Low Velocity Impact Behaviors of Composite Structures with Embedded Shape Memory Alloy Films

Abstract

The ability of shape memory alloy (SMA) film embedding within the structures for improving the damage resistance of composite structures after a low velocity impact is numerically investigated. The pseudoelastic characteristics of an SMA film are applied to dissipate high levels of energy after the impact. The 2-D incremental formulation of the SMA model is developed and implemented in the finite element program, ABAQUS using the user defined material subroutine to consider the effect of SMA films on dissipating the impact energy of the composite structures. The composite damage model based on the ChangChang failure criteria with the delamination criterion is applied. The finite element simulation of the low velocity impact behaviors of the SMA hybrid composite is performed using the ABAQUS/Explicit. Nomenclature T X = tensile strength in the fiber direction T Y = tensile strength in the transverse direction C Y = compressive strength in the transverse direction T Z = tensile strength in the through thickness direction 12 S = shear strength in the fiber and transverse direction 31 S = shear strength in the through thickness and fiber plane f S = shear strength involving fiber failure 23 m S = shear strength for matrix cracking in the transverse and through thickness plane 23 l S = shear strength for delamination in the transverse and through thickness plane