Off-Axis Tensile Test and Numerical Simulation of Unidirectional Thermoplastic Composite Laminates

Off-Axis Tensile Test and Numerical Simulation of Unidirectional Thermoplastic Composite Laminates

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As a high-performance thermoplastic composite material, AS4/PEEK has been widely used in aerospace, military, automotive, and other fields.After conducting the off-axial tensile test of unidirectional AS4/PEEK laminates jilungin dreaming tea with different angles, the relevant stress-strain curves and tensile strengths, as well as fracture plane angles are obtained.In simulation, a 3D elastic-plastic model where the parameters are determined by trust-region reflective algorithm is used to describe the nonlinear mechanical behavior of AS4/PEEK laminates.In combination with the LaRC05 criterion and the crack zone theory, a user material subroutine VUMAT based on Abaqus is developed and applied to the numerical simulation of off-axis tensile test.The numerical results show that the 3D elastic-plastic damage constitutive model can accurately simulate the plastic effect of AS4/PEEK laminates and the tensile strength predicted by the numerical method agrees well merrick backcountry wet cat food with those from the test.

The proposed 3D elastic-plastic damage model provides an accurate and effective method for the comprehensive analysis of plastic deformation and damage of thermoplastic composites.