锻压技术

超薄微尺度碳纤维/TA1复合层板的拉伸断裂行为

英文标题：Tensile fracture behavior for ultrathin micro scale carbon fibre/TA1 composite laminates

作者：郭宏王耀宋国鹏程娥赵丽滨胡宁郎利辉

分类号：TB333

出版年,卷(期):页码：2022,47(10):72-81

摘要：

基于三维Hashin失效准则、双线性牵引-分离法则、BK失效准则和韧性准则，分别定义纤维增强复合材料层、Cohesive粘结层、超薄TA1钛合金层(0.04 mm)的损伤本构模型，采用Abaqus/Explicit模块并关联VUMAT子程序，对该超薄TiGr碳纤维-钛合金层板进行准静态单向拉伸模拟，并通过准静态拉伸试验对模拟结果进行了验证，研究了超薄TiGr层板的单向拉伸变形规律。结果表明：试验和有限元模拟得到的断裂位移分别为1.60和1.53 mm，二者的相对误差为4.3%；试验与模拟的拉伸断裂缺口部位均为试件圆角区域，证明了有限元模型的准确性。并且，纤维结构对其力学性能的影响比较大：在拉伸前中期，纤维层与金属层表现出较好的协同变形能力；拉伸后期，层板出现轻微分层现象，其协同变形能力逐渐降低，最终超薄TiGr层板各组层同时断裂。

Based on 3D Hashin failure criteria,bilinear traction-separation criteria,B-K failure criteria and ductile criteria，the damage constitutive models of fiber-reinforced composite layer,Cohesive adhesive layer and ultrathin TA1 titanium alloy layer (0.04 mm) were defined respectively, and the quasi-static uniaxial tensile simulation of ultrathin TiGr laminates of carbon fiber-titanium alloy was carried out by Abaqus/Explicit module and VUMAT subroutine. Then, the simulation results were verified by quasi-static tensile test, and the uniaxial tensile deformation law of ultrathin TiGr laminates was studied. The results show that the fracture displacements obtained by test and finite element model are 1.60 and 1.53 mm, respectively. The relative error between the test and simulation results is 4.3%. Both the test and simulated tensile fracture notches are the fillet area of specimen, which proves the accuracy of the finite element model. In addition, the fiber structure has a great influence on its mechanical properties, in the early and middle stages of tensile, the fiber and metal layers show good cooperative deformation ability, while in the later stage of tensile, the laminates appear slight delamination, its cooperative deformation ability gradually decreases. Finally, all layers of ultrathin TiGr laminates are broken at the same time.

基金项目：

国家自然科学基金资助项目 (52005153)；中国博士后科学基金资助项目 (2022T150372，2021M701962)；中央引导地方科技发展项目 (206Z1803G)；材料成形与模具技术国家重点实验室开放课题研究基金 (P2021-012)

郭宏 (1998-)，男，硕士研究生,E-mail：hggh2020@126.com;通信作者：王耀 (1986-),男，博士，副教授,E-mail：bhwy2014@126.com

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