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Showing results 1 to 5 of 5 Search took 0.00 seconds. Search: Posts Made By: bigphil

Forum: OpenFOAM Programming & Development December 11, 2013, 09:07

Replies: 7 Hyperelastic material Views: 3,779 Posted By bigphil Third time lucky: The displacement gradient,... Third time lucky: The displacement gradient, also known as the transpose of the Jacobian matrix (J) is grad(U): J = fvc::grad(U).T() The deformation gradient (F) is (I + J) which is (I +...

Forum: OpenFOAM Programming & Development July 21, 2012, 07:16

Replies: 7 Hyperelastic material Views: 3,779 Posted By bigphil Actually, I made a mistake, this is wrong. ... Actually, I made a mistake, this is wrong. The displacement gradient, also known as the Jacobian matrix (J) is grad(U): J = fvc::grad(U) The deformation gradient (F) is (I + J) which is (I +...

Forum: OpenFOAM Programming & Development February 14, 2012, 18:30

Replies: 7 Hyperelastic material Views: 3,779 Posted By bigphil ZKM, I have emailed you the solver and test... ZKM, I have emailed you the solver and test case. If anyone else wants it, just drop me a PM with your email. I found some code for calculating principal stresses, you could do something...

Forum: OpenFOAM Programming & Development February 11, 2012, 16:05

Replies: 7 Hyperelastic material Views: 3,779 Posted By bigphil ZKM, I have never calculated... ZKM, I have never calculated eigenvalues/principal stretches in OpenFOAM but I think the EigenSolver class can do what you want located at: $FOAM_SRC/OpenFOAM/matrices/Matrix/tools/EigenSolver ...

Forum: OpenFOAM Programming & Development February 10, 2012, 17:46

Replies: 7 Hyperelastic material Views: 3,779 Posted By bigphil Hi ZKM, You can see how other solid material... Hi ZKM, You can see how other solid material models are implemented in $FOAM_SOLVERS/newStressAnalysis/materialModels/rheologyModel/rheologyLaws, in OpenFOAM-1.6-ext. The deformation gradient...

Showing results 1 to 5 of 5

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