三维正交机织复合材料在重复低速冲击下的有限元仿真  

Finite Element Simulation of 3D Orthogonal Woven Composites under Repeated Low-Velocity Impact

作　　者：祝泽彬 应志平[1] 

机构地区：[1]浙江理工大学机械工程学院,浙江 杭州

出　　处：《建模与仿真》2023年第3期2049-2059,共11页Modeling and Simulation

摘　　要：为了建立碳纤维三维正交机织复合材料(3DOWCs)在重复低速冲击下的有限元仿真,本工作将仿真与实验进行比较,以验证仿真的有效性。通过在自制的3D机织机上制造了3DOWCs板件,并对其进行50 J重复低速冲击试验,获得断裂形貌与力学曲线。使用多步骤方法模拟重复冲击的试验,冲击过程中引入重启动技术与人工阻尼。建立了多尺度的有限元模型,并将增强丝束材料属性与损伤模式集成至ABAQUS/Explicit用户定义材料子程序(VUMAT)中,3DOWCs损伤模型包含基于位移的失效模型与三维Hashin失效准则,以模拟3DOWCs在重复低速冲击载荷的损伤演化。使用对称边界条件,建立了1/4有限元模型,以减少计算成本。与实验结果相比,首次冲击的力学曲线、三次冲击的峰值力、损伤分布的连续性验证了该模型的有效性。In order to establish the finite element simulation of carbon fiber 3D orthogonal woven composites (3DOWCs) under repeated low-velocity impact, this work compares the simulation with the exper-iment to verify the effectiveness of the simulation. 3DOWCs plates were manufactured on a home-made 3D woven machine and subjected to 50 J repeated low-velocity impact tests, and the fracture morphology and mechanical curves were obtained. The multi-step method is used to simu-late the repeated impact test, and the restart technology and artificial damping are introduced in the impact process. A multi-scale finite element model is established, and the material properties and damage modes of the reinforced tow are integrated into the ABAQUS/Explicit user defined material subroutine (VUMAT). The 3DOWCs damage model includes a displacement-based failure model and a 3D Hashin failure criterion to simulate the damage evolution of 3DOWCs under the re-peated low-velocity impact load. Using symmetric boundary conditions, a 1/4 finite element model is established to reduce the calculation cost. Compared with the experimental results, the validity of the model is verified by the mechanical curve of the first impact, the peak force of the third impact and the continuity of the damage distribution.

关 键 词：三维正交机织复合材料 重复冲击 有限元仿真 低速冲击 断裂形貌 用户定义 计算成本 失效模型 

分 类 号：TB3[一般工业技术—材料科学与工程]