jacobian in fea

Second derivatives of displacement field ABAQUS

Submitted by rpenidef on Mon, 11/09/2015 - 15:45

Hello everyone,

I need to compute the second derivatives of displacement field in ABAQUS, in the integration point of quadratic elements if it is possible. I thought about using USDFLD subrutine, but I am stuck with getting the Jacobian matrix that couples the isoparametric space with the physical space in ABAQUS. GETVRM is what everyone suggests to get variables from abaqus, however I did not find the definitions of JMAC, JMATYP... so I do not know what I can get from that subrutine exactly.

Query -Jacobian ratio

Submitted by veeru on Mon, 05/21/2012 - 14:22

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jacobian in fea

How does the fea softwares calculate the JACOBIAN RATIO...., please explain with example.

jacobian

Submitted by kapornith on Wed, 11/09/2011 - 06:51

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jacobian in fea

Dear Experts,

I have a bit of confusion regarding jacobian interpretation in finite element analysis.What does Jacobian signifies here? Is this just a transformation matrix between two sets of co-ordinate systems or is it a measure of the deforamtion (streching/shearing) of a mesh element?

Any particlar citation for reference?

Regards

Kapil Sharma

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