: These elements are known to "lock" (over-stiffen) when simulating nearly incompressible materials or bending deformations, leading to results that underestimate true solutions.
: TET4 elements can only represent a constant strain state, which often requires a very fine mesh discretization for accurate results. tet4.rar
Papers discussing TET4 elements generally address the following characteristics: : These elements are known to "lock" (over-stiffen)