The present study aims to investigate the fiber bridging phenomenon in the fracture of a composite sheet reinforced with shape memory alloy wires undergoing transformation-induced plasticity in pseudoelastic loading. To this end, the Entchev-Lagoudas thermomechanical model is used, and the necessary equations to describe the adiabatic conditions of nitinol fibers are extracted considering the transformation-induced plasticity. The formulation needed for the numerical implementation of the constitutive model of the shape memory alloy is then developed using the convex cutting plane algorithm. The force effect of the bridging fibers on the crack edges of the composite specimen is applied directly, and the extended finite element method is used to study the fracture of the cracked composite specimen. The present research examines the effects of temperature conditions, fiber volume fraction, matrix material, and residual stresses on the results.

本研究旨在研究形状记忆合金丝增强的复合板在伪弹性载荷下发生相变诱发塑性断裂时的纤维桥接现象。为此，使用 Entchev-Lagoudas 热机械模型，并考虑到相变诱导的塑性，提取了描述镍钛诺纤维绝热条件的必要方程。然后使用凸切割平面算法开发形状记忆合金本构模型的数值实现所需的公式。直接应用桥接纤维对复合材料试件裂纹边缘的受力效应，采用扩展有限元法对复合材料试件的断裂进行了研究。