Computing the inverse Jacobian exactly with automatic differentiation, instead of by Taylor series, lets the Q1STc+ element pass the membrane patch test that Q1STc fails and improves mesh-distortion behavior.
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An enhanced single Gaussian point continuum finite element formulation using automatic differentiation
Computing the inverse Jacobian exactly with automatic differentiation, instead of by Taylor series, lets the Q1STc+ element pass the membrane patch test that Q1STc fails and improves mesh-distortion behavior.