tang

附注

the partitioning of the original matrices is only a device to facilitate matrix manipulations and does not change any results.

tang

附注

tang

附注

in linear finite element analysis three assumption is assumed: 1.strain-displacement matrix B is assumed to be constant 2.constant stress-stain matrix c 3.the boundary conditions remain unchanged

tang

附注

why use logarithmic strain? is the almansi strain ok?

tang

附注

in new-raphson method the most important point is the correct calculation of F from U and the evaluation of the tangent stiffness matrix is also important

tang

附注

tensor decomposition can be accomplished in any other admissible coordinate system.