Effective Young's modulus used by comsol for simple uniform loading
Hi, I have some fundamental problem with the solid mechanics problem. I have a square and would like to exert uniform load on the top surface. The simulated results give the correct y-stress (which is...
View ArticleRe: Effective Young's modulus used by comsol for simple uniform loading
It sounds like your pen-and-paper calculations assume plane stress. Your file is set up in plane strain. Once you switch to plane stress, you do get a y strain of -8.46e-6. Jeff
View ArticleRe: Effective Young's modulus used by comsol for simple uniform loading
Hi Jeff, Changing to plane stress works for the strains. However, the x-stress result is still wrong. In theory, it should be x-strain multiply by E, which should yield about 9000Pa, but the result i'm...
View ArticleRe: Effective Young's modulus used by comsol for simple uniform loading
Please check out this link for the relation between stresses and strains in plane stress: en.wikipedia.org/wiki/Hooke%27s_law#Plane_stress . Theoretically, Sigma_xx should be exactly zero. COMSOL...
View ArticleRe: Effective Young's modulus used by comsol for simple uniform loading
Hi Jeff, I'm a little confused. I agree with the z-stress (sigma33) to be zero which is the case in the sim. and also the link that you provided. However, x-stress should not be zero (sigma11), which...
View ArticleRe: Effective Young's modulus used by comsol for simple uniform loading
If you compute the expression at the link above you will find that it results in Sigma_xx=0. This is also trivial if you think about it: your model is invariant in the x direction so if you imagine...
View ArticleRe: Effective Young's modulus used by comsol for simple uniform loading
hi Jeff, Thanks. I understand that now.
View ArticleEffective Young's modulus used by comsol for simple uniform loading
Hi, I have some fundamental problem with the solid mechanics problem. I have a square and would like to exert uniform load on the top surface. The simulated results give the correct y-stress (which is...
View ArticleRe: Effective Young's modulus used by comsol for simple uniform loading
It sounds like your pen-and-paper calculations assume plane stress. Your file is set up in plane strain. Once you switch to plane stress, you do get a y strain of -8.46e-6. Jeff
View ArticleRe: Effective Young's modulus used by comsol for simple uniform loading
Hi Jeff, Changing to plane stress works for the strains. However, the x-stress result is still wrong. In theory, it should be x-strain multiply by E, which should yield about 9000Pa, but the result i'm...
View ArticleRe: Effective Young's modulus used by comsol for simple uniform loading
Please check out this link for the relation between stresses and strains in plane stress: en.wikipedia.org/wiki/Hooke%27s_law#Plane_stress . Theoretically, Sigma_xx should be exactly zero. COMSOL...
View ArticleRe: Effective Young's modulus used by comsol for simple uniform loading
Hi Jeff, I'm a little confused. I agree with the z-stress (sigma33) to be zero which is the case in the sim. and also the link that you provided. However, x-stress should not be zero (sigma11), which...
View ArticleRe: Effective Young's modulus used by comsol for simple uniform loading
If you compute the expression at the link above you will find that it results in Sigma_xx=0. This is also trivial if you think about it: your model is invariant in the x direction so if you imagine...
View ArticleRe: Effective Young's modulus used by comsol for simple uniform loading
hi Jeff, Thanks. I understand that now.
View ArticleEffective Young's modulus used by comsol for simple uniform loading
Hi, I have some fundamental problem with the solid mechanics problem. I have a square and would like to exert uniform load on the top surface. The simulated results give the correct y-stress (which is...
View ArticleRe: Effective Young's modulus used by comsol for simple uniform loading
It sounds like your pen-and-paper calculations assume plane stress. Your file is set up in plane strain. Once you switch to plane stress, you do get a y strain of -8.46e-6. Jeff
View ArticleRe: Effective Young's modulus used by comsol for simple uniform loading
Hi Jeff, Changing to plane stress works for the strains. However, the x-stress result is still wrong. In theory, it should be x-strain multiply by E, which should yield about 9000Pa, but the result i'm...
View ArticleRe: Effective Young's modulus used by comsol for simple uniform loading
Please check out this link for the relation between stresses and strains in plane stress: en.wikipedia.org/wiki/Hooke%27s_law#Plane_stress . Theoretically, Sigma_xx should be exactly zero. COMSOL...
View ArticleRe: Effective Young's modulus used by comsol for simple uniform loading
Hi Jeff, I'm a little confused. I agree with the z-stress (sigma33) to be zero which is the case in the sim. and also the link that you provided. However, x-stress should not be zero (sigma11), which...
View ArticleRe: Effective Young's modulus used by comsol for simple uniform loading
If you compute the expression at the link above you will find that it results in Sigma_xx=0. This is also trivial if you think about it: your model is invariant in the x direction so if you imagine...
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