Jan 15, 2018
024: Non-Linearity: Material Nonlinearity
Introduction
Linear elastic FE analysis is based on linear constitutive stress-strain equations
in which the terms of material matrix D are expressed as functions of constant values of modulus of elasticity and Poisson’s ratio. The constant D matrix leads to a constant stiffness matrix K, which is for strain-displacement relationship
given by
Departure from linear elasticity implies that the…
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