Different compressive & tensile moduli

[briand]

I am needing to predict deflection in various composite geometries.  Material properties are typically known from data sheets and testing.

The tensile and compressive moduli are often different and this can have a significant effect on part deflection.

Unfotunately ASCD has only one input for E11, and does not have different inputs for +E11 and -E11.

If you could inlcude these inputs on the next version of the software that would be really helpful.

[lissacoffey]

Tangent and secant modulus of elasticity are equal, up to the proportional limit of a material. Depending on the type of loading represented by the stress-strain diagram, modulus of elasticity may be reported as: compressive modulus of elasticity (or modulus of elasticity in compression); flexural modulus of elasticity (or modulus of elasticity in flexure); shear modulus of elasticity (or modulus of elasticity in shear); tensile modulus of elasticity (or modulus of elasticity in tension); or torsional modulus of elasticity (or modulus of elasticity in torsion). Modulus of elasticity may be determined by dynamic testing, where it can be derived from complex modulus. Modulus used alone generally refers to tensile modulus of elasticity. Shear modulus is almost always equal to torsional modulus and both are called modulus of rigidity. Moduli of elasticity in tension and compression are approximately equal and are known as Young's modulus. Modulus of rigidity is related to Young's modulus by the equation  E = 2G(r+1)   where E is Young's modulus (psi), G is modulus of rigidity (psi) and r is Poisson's ratio. Modulus of elasticity also is called elastic modulus and coefficient of elasticity.       

Thanks

lissacoffey

website

2015 PDSU Win7 x64 Dell Z620 Xeon 3.7GHz 32GB Nvidia Quadro K5000