Inventor: Difference between assembled part and single part in Stress Analysis

[Anonymous]

Good Morning guys,

I have a question on how inventor works as a assembled part. 

Giving an example of a box, I can decide to assemble 6 parts to produce a box. Other way around is single part(simply done with extrusion and shell command).

What are the difference of these and how it will affect the stress analysis. 

How about weldment that was suppose to be there? 

What is the best method to design your machine in engineering industry? 

Thank you 

---

@Anonymous,

marius.gildehaus has edited your subject line for clarity
Original: Difference between assembled part and single part

---

[IgorMir]

Are you studying toward diploma in Engineering? I hope so. The question you have asked requires a course in engineering discipline to answer.

Cheers,

Igor.

[Anonymous]

I have graduated with engineering degree. working in a firm now 

[johnsonshiue]

Hi! Inventor is trying to simulate real world conditions. So, for a given material, a shelled body is definitely structure-wise stronger than a 5-sided box of the same material. In an assembly, Inventor simulate the condition via Contact, meaning the mesh elements between two bodies touching each other but they are not merged together.

I think you should create your design and set up your simulation as close to real world as possible. If you are designing a 5-sided box, you should not use a shelled box to simulate and vice versa.

Many thanks!

[Anonymous]

Thank you johnson,

As of you mentioned that the i should try to simulate so close to the real world, Do i have to assemble with weldment? will the additional procedure,weldment, after constraining all the parts together, make a difference in future analysis? 

Thank you 

[johnsonshiue · Accepted solution]

Hi! As I mentioned earlier, you should construct your model as close as real world. If you will weld the box, you should create weld beads.

Many thanks!

[Anonymous]

Thanks alot !!