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Re: How to calculate the Virtual Wall Stiffness to Simulate Concrete
Poovaiah Devenira Aug 17, 2009 2:38 PM (in response to Poovaiah Devenira)E = Elastic Modulus, G = Shear modulus
Assuming the depth (d) Assuming length, (L) The value to be entered @ Axial stiffness is E/d (lb/in^{3}) The value to be entered @ Tangential stiffness is G/L (lb/in^{3}) 
Re: How to calculate the Virtual Wall Stiffness to Simulate Concrete
Joe Galliera Sep 1, 2009 5:07 PM (in response to Poovaiah Devenira)Search in the Knowledge Base for this article:
S018797: Axial and tangential stiffness for virtual wall and drop test analyses
Basically, Axial Stiffness = E/t and Tangential Stiffness = G/t and for an isotropic material G = (E/2)(1+nu). E is elastic modulus, G is shear modulus, t is wall thickness and nu is poisson's ratio.