Boundary conditions in terms of integrated forces and moments
Hello, I am interested in simulating with COMSOL (version 4.2a) the following (I think) simple and rather academic elasticity problem. Let us consider a cylindrical rod (3D system with axis along Z),...
View ArticleRe: Boundary conditions in terms of integrated forces and moments
Hi, The problem is not well posed. There is an infinite number of stress distributions which will fulfill your six equations. As an example, any shear stress distribution having sxz(X)=-sxz(-X) will...
View ArticleRe: Boundary conditions in terms of integrated forces and moments
Hi All Its clear that there will be infinite number of stress distributions which satisfy the required conditions. But I think by Saint-Venant’s principle the strain, stress and displacements caused by...
View ArticleRe: Boundary conditions in terms of integrated forces and moments
Hi again, I agree in a sense with both Henrik and Heruy. An elasticity problem in a finite body requires a pointwise specification of the applied loads to be well posed, but it is also true that...
View ArticleRe: Boundary conditions in terms of integrated forces and moments
Hi Alberto, In case that the local solution is not important, I would recommend using the rigid connector. Another approach could be to enter boundary loads like Fz=A+B*X+C*Y and then determine the...
View ArticleBoundary conditions in terms of integrated forces and moments
Hello, I am interested in simulating with COMSOL (version 4.2a) the following (I think) simple and rather academic elasticity problem. Let us consider a cylindrical rod (3D system with axis along Z),...
View ArticleRe: Boundary conditions in terms of integrated forces and moments
Hi, The problem is not well posed. There is an infinite number of stress distributions which will fulfill your six equations. As an example, any shear stress distribution having sxz(X)=-sxz(-X) will...
View ArticleRe: Boundary conditions in terms of integrated forces and moments
Hi All Its clear that there will be infinite number of stress distributions which satisfy the required conditions. But I think by Saint-Venant’s principle the strain, stress and displacements caused by...
View ArticleRe: Boundary conditions in terms of integrated forces and moments
Hi again, I agree in a sense with both Henrik and Heruy. An elasticity problem in a finite body requires a pointwise specification of the applied loads to be well posed, but it is also true that...
View ArticleRe: Boundary conditions in terms of integrated forces and moments
Hi Alberto, In case that the local solution is not important, I would recommend using the rigid connector. Another approach could be to enter boundary loads like Fz=A+B*X+C*Y and then determine the...
View ArticleBoundary conditions in terms of integrated forces and moments
Hello, I am interested in simulating with COMSOL (version 4.2a) the following (I think) simple and rather academic elasticity problem. Let us consider a cylindrical rod (3D system with axis along Z),...
View ArticleRe: Boundary conditions in terms of integrated forces and moments
Hi, The problem is not well posed. There is an infinite number of stress distributions which will fulfill your six equations. As an example, any shear stress distribution having sxz(X)=-sxz(-X) will...
View ArticleRe: Boundary conditions in terms of integrated forces and moments
Hi All Its clear that there will be infinite number of stress distributions which satisfy the required conditions. But I think by Saint-Venant’s principle the strain, stress and displacements caused by...
View ArticleRe: Boundary conditions in terms of integrated forces and moments
Hi again, I agree in a sense with both Henrik and Heruy. An elasticity problem in a finite body requires a pointwise specification of the applied loads to be well posed, but it is also true that...
View ArticleRe: Boundary conditions in terms of integrated forces and moments
Hi Alberto, In case that the local solution is not important, I would recommend using the rigid connector. Another approach could be to enter boundary loads like Fz=A+B*X+C*Y and then determine the...
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