Bolt connections not being simulated

Anonymous

Bolt connections not being simulated

Anonymous
Not applicable

Hello,
I am trying to run a non-linear simulation of a box with a lid - the lid is held down to the box by a number of bolts. 
I set the contacts between the lid and the box to Free(as they are free to move if not bolted down since the lid "rests" on the box with a skirt around, like a shoe box) and set bolts to it around the perimeter. 
When I run the simulation with no preload to the bolts, and check Displacement results, the bolts remain stationary whilst the box and lid deform.  I am suspecting that the bolts are not being simulated.   Is this normal that the bolts do not move with the bodies during deformation, or not? 

I suspected this was because I did not add preload. When I tried to add a preload to the bolts, I get an error "Maximum number of bisections permitted reached".  
Am I doing something wrong?  Unfortunately I am not at liberty to share the model.  
Is there a tutorial/example of a simple box + lid + bolts I could follow, please? 

Thank you 🙂 

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John_Holtz
Autodesk Support
Autodesk Support

Hi @Anonymous 

 

In your first simulation, the box and lid move together, as if connected by the bolts. Is that correct?

 

The bolts are just a graphics symbol, much like a force area is a graphics symbol. Neither the bolt nor force are shown on the displaced model. You should hide the bolts so that they do not cause confusion. (If I remember correctly, Fusion does not show the results in the bolts either, which are analyzed using beam elements. If they are shown, it would be a line along the centerline of the bolt.

 

In your second simulation with the bolt preload, you should change the contact from free to separation. (Actually, separation is the correct contact type for the first analysis, too. The lid and box can separate, but they cannot pass through each other. Free would allow them to pass through each other.)

 

Let us know what you find out.

 



John Holtz, P.E.

Global Product Support
Autodesk, Inc.


If not provided already, be sure to indicate the version of Inventor Nastran you are using!

"The knowledge you seek is at knowledge.autodesk.com" - Confucius 😉
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Anonymous
Not applicable

Thank you for the reply!
Correct about the body parts moving together as if they are bolted - I thought that it might be just a bad representation however I wanted to be sure that that was the case, and not a bad set-up.

With regards to using Separation, when I tried using it the first time(without preload), I was getting an error(forgot exactly what it was), which is what led me to using Free in the first place. Tomorrow I will try to run the sim again with Separation set again and will try with and without preload and let you know.  We are yet to determine what preload, if any, to use that is why I want to keep it nil for now

Thank you once again!

Daniel

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Anonymous
Not applicable

Hi again, this morning I tried to run it with separation contacts and preload and got this error: Insufficient Element Storage Space Allocated.  I added the error log below in case it might help. It says to increase the MAXADJEDGE, something I have no idea how to do.

If I leave the sim to free contacts(without preload) will it be accurate as well, or not at all since you said they would pass through each other? When I ran it with free they deformed together, didn't intersect though.

Thank you again 🙂 

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John_Holtz
Autodesk Support
Autodesk Support

Hi Daniel,

 

Thanks for the log file. You will need to use separation contact in order to create a preload in the bolt. The analysis cannot generate any preload if the contact is free. (It would be like trying to tighten a nut when there is still a gap between the nut and washer.)

 

The error message indicates that there are too many contact elements. The only control that Fusion has to limit the number of contact elements is to specify the Maximum Activation Distance for each contact pair. Since the parts are bolted, I assume that they will not be sliding relative to each other. 🙂 Therefore, the activation distance just needs to be 1.1 to 1.2 times larger than the mesh size on the faces that contact.

 

I see one other thing in the log file. Your mesh is rather poor. The worst aspect ratio is 1.5E+5 because the longest edge (side of an element) is 0.161 m and the shortest side is 4.76E-7 m. (Wow, get out the microscope to see that one!) The ideal aspect ratio is 1. It looks like you either need a much finer mesh (before running the final analysis), or you need to remove the small feature that is causing the short edge.

 

Let us know if you have any other problems.

 



John Holtz, P.E.

Global Product Support
Autodesk, Inc.


If not provided already, be sure to indicate the version of Inventor Nastran you are using!

"The knowledge you seek is at knowledge.autodesk.com" - Confucius 😉
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Anonymous
Not applicable

Thank you so much for the help! I managed to run it with preload and separation contact, I set the activation distance to automatically.  The results make much more sense now!

With regards to the mesh, I know it is very messy but I was more focused on trying to get the set-up right first before refining the mesh, so if I run a sim it wouldn't take long since chances were the sim wouldn't be correct anyways 😄  I tried to make it a little bit more uniform however I still have some very tiny sides which I cannot get rid of, at least for now. 

The last question - another sim I have been trying to do was an event simulation(to simulate the force as an impact over time - a rather big one of 35G over 60ms) however I was getting an error  that elements are detected with a negative volume that were not deleted from the model.  I tried to see intersections between the lid and bottom and there is none.  Could it be because the lid was created by taking a "counter shape" of the bottom, and not as a solid from scratch? 

Thanks! 

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John_Holtz
Autodesk Support
Autodesk Support

Hi Daniel,

 

Good work on getting the analysis to complete by setting the activation distance to Automatic.

 

Good work on starting with a coarse mesh and planning to refine it later. Even after years of experience, it normally takes me a couple of runs to get the analysis to work like I intended (partly due to my errors, partly due to other issues.)

 

For the event simulation, the solution depends on when the negative volumes occur. The elements could start with a negative volume due to a poor mesh, or the elements could be crushed during the analysis and produce a negative volume (essentially breaking the elements). I am not sure if you can determine which one of those occurs; the output may not be specific enough if the analysis is failing. However, you can have the software remove the elements with negative volumes. "Manage > Element Deletion Criteria". If the negative volume is due to the mesh, those elements will be removed and the model has "holes" scattered throughout. (It is like a porous casting.) If the negative volume is due to the distortion, the elements are removed and the analysis continues. If enough elements are removed, then your model breaks apart and you see the pieces go flying.



John Holtz, P.E.

Global Product Support
Autodesk, Inc.


If not provided already, be sure to indicate the version of Inventor Nastran you are using!

"The knowledge you seek is at knowledge.autodesk.com" - Confucius 😉
1 Like

Anonymous
Not applicable

Hi John,

 

Thank you for your feedback! So far everything is working great.

With regards to the event simulation, I did as you said and apparently it did solve something,  because now the sim is running beyond that initial negative body error. However now I got another error about energy balance calculation yielding an NaN quantity; I am attaching as a log as well(Error).  As Fusion said, and as I suspected, the load is slightly exaggerated.  I tried using the same load  over a distributed surface instead of concentrated, yet it resulted in the same result(Error 2)Just in case, is it possible that there is another problem other than the load magnitude, please?  

Daniel

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John_Holtz
Autodesk Support
Autodesk Support

Hi,

 

I think the problem is related to the loads or the material properties, or the real part crushes beyond the capabilities of a simulation.

 

I think you are doing some type of impact. Is there a reason you are applying some type of force instead of simulating the impact? Is applying a gravity load (that is, an acceleration) more appropriate than a force load?

 



John Holtz, P.E.

Global Product Support
Autodesk, Inc.


If not provided already, be sure to indicate the version of Inventor Nastran you are using!

"The knowledge you seek is at knowledge.autodesk.com" - Confucius 😉
1 Like

Anonymous
Not applicable

The simulation should be an impact/shock load of 35Gs for 60milliseconds - assuming that the housing plus it's contents(not included) weight 700kg total, I tried to simulate a load of 35Gs (700kg * 9.81m/s2 * 35) which is 240kN and lasting 60ms(0.06s in the time varying loading) acting on the side. I set the magnitude curve as in the screenshot. Does it make sense this way, or should I simulate it taking a different approach?  

 

2030994ZB45_0-1604416515823.png

 

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Anonymous
Not applicable

I just figured I could have use a prescribed translation after some experimentation - which I believe suites my need better by using the actual acceleration caused by the shock impact over a period of time. I am trying it right now and will get back with the results. 

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Anonymous
Not applicable

quick update, I set the prescribed translation as follows:

2030994ZB45_0-1604419395122.png

 

The result was 0 for anything. No displacement, no stresses, no reaction forces.  
I used 342m/s2 derived from the 35Gs of the 700kg. i.e. 240,000N/700kg = 342m/s2 = 9.81m/s2 * 35g

I applied this on one side surface, I fixed the opposite surface so it does not move with the force.  I am attaching a screen shot of the forces of a sample model.  The intention is to simulate a shock impact where the acceleration is put.  

2030994ZB45_1-1604419587963.png

 

It seems like I totally misunderstood the concept of prescribed translation

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Anonymous
Not applicable

quick update, I set the prescribed translation as follows:

2030994ZB45_0-1604419395122.png

 

The result was 0 for anything. No displacement, no stresses, no reaction forces.  
I used 342m/s2 derived from the 35Gs of the 700kg. i.e. 240,000N/700kg = 342m/s2 = 9.81m/s2 * 35g

I applied this on one side surface, I fixed the opposite surface so it does not move with the force.  I am attaching a screen shot of the forces of a sample model.  The intention is to simulate a shock impact where the acceleration is put.  

2030994ZB45_1-1604419587963.png

 

It seems like I totally misunderstood the concept of prescribed translation and am at a loss of how to simulate what I need

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John_Holtz
Autodesk Support
Autodesk Support

Hi @Anonymous 

 

At least you got results. That is further than some people get. 🙂

 

On a more serious note, your input looks okay. I did a simple test here to confirm that prescribe acceleration works, and it moved the model. I cannot think of anything that would be preventing it from working (as long as the part has mass and the same geometry with the prescribed motion is not constrained). There may be some clue in the output file ("Results > Inspect > Solver Data > Solver Output").

 

If you don't see anything obvious, feel free to export the model ("File > Export") and attach the .f3d file to the forum.

 



John Holtz, P.E.

Global Product Support
Autodesk, Inc.


If not provided already, be sure to indicate the version of Inventor Nastran you are using!

"The knowledge you seek is at knowledge.autodesk.com" - Confucius 😉
1 Like

Anonymous
Not applicable

Hello John,

Apologies for the delay, I was away from home for a couple of days. 
Unfortunately I am not at liberty to share the exact model we are working on.
Would it be possible to upload a model of a plain box with similar conditions to how I set up the actual model, instead?

And just to clarify that I understood you well and we are on the same page, we are talking about an impact acceleration to simulate how an object would behave if it is hit from one side, and bolted from another(for example), not just how it would move freely, correct?

Kind Regards,
Daniel

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John_Holtz
Autodesk Support
Autodesk Support

Hi @Anonymous 

 

If you can replicate the issue with another model that you can share, that would be great.

 

I believe we are on the same page. I applied a prescribe translation to a face and set the type to acceleration, just like shown in your image. To test some possibilities, I did two tests: one with a model and no constraints (so the body was free to move), and one test with a constraint on the opposite side from the acceleration (so the body would be stretched by the acceleration load).



John Holtz, P.E.

Global Product Support
Autodesk, Inc.


If not provided already, be sure to indicate the version of Inventor Nastran you are using!

"The knowledge you seek is at knowledge.autodesk.com" - Confucius 😉
1 Like

Anonymous
Not applicable

Hello John,

Thank you so much for all your patience, really! 

So I tried it with a box(attaching the .f3d below) and it worked - same set-up.  I used lower acceleration since the box is smaller, and the fixed constrained points are slightly different too.
In the mean time I ran the simulation again with the original model and it yielded 0 stresses/displacements once again, which is very strange. 

Now I have deleted the old set-up and started anew.  However I noticed this time the sim is taking slightly longer, so it might actually be doing something(?), hoping for the best this time.

I would appreciate if you could tell me if my approach to setting up the test box is good to simulate a force over a period of time.  I will update you with the result of the current actual sim once it finishes too.

Kind Regards,
Daniel

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Anonymous
Not applicable

Quick update, the actual sim now resulted once again in a NaN as before.  So I am assuming the fault is in the design not being able to withstand the set load.  Although it does seem strange - for the box I used only 1/2 of the acceleration but it has thinner walls and no inner structure so should also be much weaker.

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John_Holtz
Autodesk Support
Autodesk Support

Hi,

 

I took a look at the test box. The only thing that I see is that the total event duration is set to the default (0.001 sec) but the prescribed acceleration curve is set to 0.18 sec. The analysis may run, but it only covers a very small fraction of the total analysis. (I tried running it with a total duration of 0.18 seconds but stopped it after 3 hours. With a duration of 0.001 sec, the analysis completes in under 1 minute. The time step size of 1.44E-7 implies that 0.18/1.44E-7 = 1.25 million time steps would need to be solved to get to the full duration, and that is why the analysis takes a long time to run. I see that plasticity is activated, so the time step will get smaller (more calculation steps and longer runtime!) if the part begins to yield.)

 

For the question of whether the load is a good representation of the real situation, that depends on what the real situation is. If you have a specification that says to test it for an acceleration for a certain rate, you need to duplicate what the specification means as far as where the acceleration is applied, the ramp, and so on. If you are simulating a drop test (whether dropping the box or dropping something onto the box), then that test can be setup in the event simulation.

 



John Holtz, P.E.

Global Product Support
Autodesk, Inc.


If not provided already, be sure to indicate the version of Inventor Nastran you are using!

"The knowledge you seek is at knowledge.autodesk.com" - Confucius 😉
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Anonymous
Not applicable

Aha, so that is what I was not getting at all, I assumed that the event duration would automatically be set to the duration of the prescriber translation!  And no deformation was occurring because the acceleration was set to start at 0.06s, well after the event duration ends. 

Now I extended the event duration(to 0.06s, and set the acceleration to be applied from 0 to 0.06s) but it is returning an error whenever I try to run the sim as attached in the log file.   The sim is failing almost instantly.  No specific error, just that it could not be solved.  I checked the error log myself, and I saw that it could be due to the duration time set too long(I doubt 60milliseconds would be considered too long).

Again, I adjusted the test box I had sent you, set the event duration to match the one for my model and so far it is running with no issues, at least it has been running for much longer than the other before it returned the error.   Once again I am at a loss, to see two same set-ups behaving differently/returning different errors.  

With regards to what I am after with this is basically to simulate a box(that houses a component in a vehicle) for an impact shock - one requirement is, for instance, 25G for 60milliseconds half sine (there are various ones though).  I decided to constrain the side opposite to where the acceleration is applied because I took the assumption that the box cannot move there since it will be held in place by the vehicle - not going into the detail of how the vehicle itself would behave on that end.  

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We use HubSpot to send you more timely and relevant email content. To do this, we collect data about your online behavior and your interaction with the emails we send. Data collected may include pages you’ve visited, trials you’ve initiated, videos you’ve played, purchases you’ve made, your IP address or device ID, email open rates, links clicked, and others. HubSpot Privacy Policy
Twitter
We use Twitter to deploy digital advertising on sites supported by Twitter. Ads are based on both Twitter data and behavioral data that we collect while you’re on our sites. The data we collect may include pages you’ve visited, trials you’ve initiated, videos you’ve played, purchases you’ve made, and your IP address or device ID. This information may be combined with data that Twitter has collected from you. We use the data that we provide to Twitter to better customize your digital advertising experience and present you with more relevant ads. Twitter Privacy Policy
Facebook
We use Facebook to deploy digital advertising on sites supported by Facebook. Ads are based on both Facebook data and behavioral data that we collect while you’re on our sites. The data we collect may include pages you’ve visited, trials you’ve initiated, videos you’ve played, purchases you’ve made, and your IP address or device ID. This information may be combined with data that Facebook has collected from you. We use the data that we provide to Facebook to better customize your digital advertising experience and present you with more relevant ads. Facebook Privacy Policy
LinkedIn
We use LinkedIn to deploy digital advertising on sites supported by LinkedIn. Ads are based on both LinkedIn data and behavioral data that we collect while you’re on our sites. The data we collect may include pages you’ve visited, trials you’ve initiated, videos you’ve played, purchases you’ve made, and your IP address or device ID. This information may be combined with data that LinkedIn has collected from you. We use the data that we provide to LinkedIn to better customize your digital advertising experience and present you with more relevant ads. LinkedIn Privacy Policy
Yahoo! Japan
We use Yahoo! Japan to deploy digital advertising on sites supported by Yahoo! Japan. Ads are based on both Yahoo! Japan data and behavioral data that we collect while you’re on our sites. The data we collect may include pages you’ve visited, trials you’ve initiated, videos you’ve played, purchases you’ve made, and your IP address or device ID. This information may be combined with data that Yahoo! Japan has collected from you. We use the data that we provide to Yahoo! Japan to better customize your digital advertising experience and present you with more relevant ads. Yahoo! Japan Privacy Policy
Naver
We use Naver to deploy digital advertising on sites supported by Naver. Ads are based on both Naver data and behavioral data that we collect while you’re on our sites. The data we collect may include pages you’ve visited, trials you’ve initiated, videos you’ve played, purchases you’ve made, and your IP address or device ID. This information may be combined with data that Naver has collected from you. We use the data that we provide to Naver to better customize your digital advertising experience and present you with more relevant ads. Naver Privacy Policy
Quantcast
We use Quantcast to deploy digital advertising on sites supported by Quantcast. Ads are based on both Quantcast data and behavioral data that we collect while you’re on our sites. The data we collect may include pages you’ve visited, trials you’ve initiated, videos you’ve played, purchases you’ve made, and your IP address or device ID. This information may be combined with data that Quantcast has collected from you. We use the data that we provide to Quantcast to better customize your digital advertising experience and present you with more relevant ads. Quantcast Privacy Policy
Call Tracking
We use Call Tracking to provide customized phone numbers for our campaigns. This gives you faster access to our agents and helps us more accurately evaluate our performance. We may collect data about your behavior on our sites based on the phone number provided. Call Tracking Privacy Policy
Wunderkind
We use Wunderkind to deploy digital advertising on sites supported by Wunderkind. Ads are based on both Wunderkind data and behavioral data that we collect while you’re on our sites. The data we collect may include pages you’ve visited, trials you’ve initiated, videos you’ve played, purchases you’ve made, and your IP address or device ID. This information may be combined with data that Wunderkind has collected from you. We use the data that we provide to Wunderkind to better customize your digital advertising experience and present you with more relevant ads. Wunderkind Privacy Policy
ADC Media
We use ADC Media to deploy digital advertising on sites supported by ADC Media. Ads are based on both ADC Media data and behavioral data that we collect while you’re on our sites. The data we collect may include pages you’ve visited, trials you’ve initiated, videos you’ve played, purchases you’ve made, and your IP address or device ID. This information may be combined with data that ADC Media has collected from you. We use the data that we provide to ADC Media to better customize your digital advertising experience and present you with more relevant ads. ADC Media Privacy Policy
AgrantSEM
We use AgrantSEM to deploy digital advertising on sites supported by AgrantSEM. Ads are based on both AgrantSEM data and behavioral data that we collect while you’re on our sites. The data we collect may include pages you’ve visited, trials you’ve initiated, videos you’ve played, purchases you’ve made, and your IP address or device ID. This information may be combined with data that AgrantSEM has collected from you. We use the data that we provide to AgrantSEM to better customize your digital advertising experience and present you with more relevant ads. AgrantSEM Privacy Policy
Bidtellect
We use Bidtellect to deploy digital advertising on sites supported by Bidtellect. Ads are based on both Bidtellect data and behavioral data that we collect while you’re on our sites. The data we collect may include pages you’ve visited, trials you’ve initiated, videos you’ve played, purchases you’ve made, and your IP address or device ID. This information may be combined with data that Bidtellect has collected from you. We use the data that we provide to Bidtellect to better customize your digital advertising experience and present you with more relevant ads. Bidtellect Privacy Policy
Bing
We use Bing to deploy digital advertising on sites supported by Bing. Ads are based on both Bing data and behavioral data that we collect while you’re on our sites. The data we collect may include pages you’ve visited, trials you’ve initiated, videos you’ve played, purchases you’ve made, and your IP address or device ID. This information may be combined with data that Bing has collected from you. We use the data that we provide to Bing to better customize your digital advertising experience and present you with more relevant ads. Bing Privacy Policy
G2Crowd
We use G2Crowd to deploy digital advertising on sites supported by G2Crowd. Ads are based on both G2Crowd data and behavioral data that we collect while you’re on our sites. The data we collect may include pages you’ve visited, trials you’ve initiated, videos you’ve played, purchases you’ve made, and your IP address or device ID. This information may be combined with data that G2Crowd has collected from you. We use the data that we provide to G2Crowd to better customize your digital advertising experience and present you with more relevant ads. G2Crowd Privacy Policy
NMPI Display
We use NMPI Display to deploy digital advertising on sites supported by NMPI Display. Ads are based on both NMPI Display data and behavioral data that we collect while you’re on our sites. The data we collect may include pages you’ve visited, trials you’ve initiated, videos you’ve played, purchases you’ve made, and your IP address or device ID. This information may be combined with data that NMPI Display has collected from you. We use the data that we provide to NMPI Display to better customize your digital advertising experience and present you with more relevant ads. NMPI Display Privacy Policy
VK
We use VK to deploy digital advertising on sites supported by VK. Ads are based on both VK data and behavioral data that we collect while you’re on our sites. The data we collect may include pages you’ve visited, trials you’ve initiated, videos you’ve played, purchases you’ve made, and your IP address or device ID. This information may be combined with data that VK has collected from you. We use the data that we provide to VK to better customize your digital advertising experience and present you with more relevant ads. VK Privacy Policy
Adobe Target
We use Adobe Target to test new features on our sites and customize your experience of these features. To do this, we collect behavioral data while you’re on our sites. This data may include pages you’ve visited, trials you’ve initiated, videos you’ve played, purchases you’ve made, your IP address or device ID, your Autodesk ID, and others. You may experience a different version of our sites based on feature testing, or view personalized content based on your visitor attributes. Adobe Target Privacy Policy
Google Analytics (Advertising)
We use Google Analytics (Advertising) to deploy digital advertising on sites supported by Google Analytics (Advertising). Ads are based on both Google Analytics (Advertising) data and behavioral data that we collect while you’re on our sites. The data we collect may include pages you’ve visited, trials you’ve initiated, videos you’ve played, purchases you’ve made, and your IP address or device ID. This information may be combined with data that Google Analytics (Advertising) has collected from you. We use the data that we provide to Google Analytics (Advertising) to better customize your digital advertising experience and present you with more relevant ads. Google Analytics (Advertising) Privacy Policy
Trendkite
We use Trendkite to deploy digital advertising on sites supported by Trendkite. Ads are based on both Trendkite data and behavioral data that we collect while you’re on our sites. The data we collect may include pages you’ve visited, trials you’ve initiated, videos you’ve played, purchases you’ve made, and your IP address or device ID. This information may be combined with data that Trendkite has collected from you. We use the data that we provide to Trendkite to better customize your digital advertising experience and present you with more relevant ads. Trendkite Privacy Policy
Hotjar
We use Hotjar to deploy digital advertising on sites supported by Hotjar. Ads are based on both Hotjar data and behavioral data that we collect while you’re on our sites. The data we collect may include pages you’ve visited, trials you’ve initiated, videos you’ve played, purchases you’ve made, and your IP address or device ID. This information may be combined with data that Hotjar has collected from you. We use the data that we provide to Hotjar to better customize your digital advertising experience and present you with more relevant ads. Hotjar Privacy Policy
6 Sense
We use 6 Sense to deploy digital advertising on sites supported by 6 Sense. Ads are based on both 6 Sense data and behavioral data that we collect while you’re on our sites. The data we collect may include pages you’ve visited, trials you’ve initiated, videos you’ve played, purchases you’ve made, and your IP address or device ID. This information may be combined with data that 6 Sense has collected from you. We use the data that we provide to 6 Sense to better customize your digital advertising experience and present you with more relevant ads. 6 Sense Privacy Policy
Terminus
We use Terminus to deploy digital advertising on sites supported by Terminus. Ads are based on both Terminus data and behavioral data that we collect while you’re on our sites. The data we collect may include pages you’ve visited, trials you’ve initiated, videos you’ve played, purchases you’ve made, and your IP address or device ID. This information may be combined with data that Terminus has collected from you. We use the data that we provide to Terminus to better customize your digital advertising experience and present you with more relevant ads. Terminus Privacy Policy
StackAdapt
We use StackAdapt to deploy digital advertising on sites supported by StackAdapt. Ads are based on both StackAdapt data and behavioral data that we collect while you’re on our sites. The data we collect may include pages you’ve visited, trials you’ve initiated, videos you’ve played, purchases you’ve made, and your IP address or device ID. This information may be combined with data that StackAdapt has collected from you. We use the data that we provide to StackAdapt to better customize your digital advertising experience and present you with more relevant ads. StackAdapt Privacy Policy
The Trade Desk
We use The Trade Desk to deploy digital advertising on sites supported by The Trade Desk. Ads are based on both The Trade Desk data and behavioral data that we collect while you’re on our sites. The data we collect may include pages you’ve visited, trials you’ve initiated, videos you’ve played, purchases you’ve made, and your IP address or device ID. This information may be combined with data that The Trade Desk has collected from you. We use the data that we provide to The Trade Desk to better customize your digital advertising experience and present you with more relevant ads. The Trade Desk Privacy Policy
RollWorks
We use RollWorks to deploy digital advertising on sites supported by RollWorks. Ads are based on both RollWorks data and behavioral data that we collect while you’re on our sites. The data we collect may include pages you’ve visited, trials you’ve initiated, videos you’ve played, purchases you’ve made, and your IP address or device ID. This information may be combined with data that RollWorks has collected from you. We use the data that we provide to RollWorks to better customize your digital advertising experience and present you with more relevant ads. RollWorks Privacy Policy

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