Y. Wang
,
J. Chen
,
H.B. Li
,
null
金属学报(英文版)
An improved interface cohesive zone model is
developed for the simulation of interface contact, under mixed-mode
loading. A new debonding initiation criterion and propagation of
debonding law, taking into account the pressure stress influence on
contact shear strength, is proposed. The model is implemented in a
finite-element program using subroutine VUINTER of ABAQUS Explicit.
An edge-notch four-point bending process and laminated vibration
damping steel sheet punch forming test are simulated with the
improved model in ABAQUS Explicit. The numerical predictions agree
satisfactorily with the corresponding experimental results.
关键词:
Cohesive zone model
,
null
,
null
,
null
曹德胜
,
任成祖
,
张立峰
,
李远辰
,
李巾锭
宇航材料工艺
doi:10.12044/j.issn.1007-2330.2017.02.005
连续纤维增韧陶瓷基复合材料制备过程中因纤维与基体线胀系数失配会产生热残余应力,从而导致纤维脱粘、基体开裂等现象,严重影响复合材料力学性能.本文针对CVI工艺制备的单向C/SiC复合材料,建立“纤维-界面-基体”单胞物理模型,基于细观力学分析方法对热残余应力分布规律进行预测,采用ABAQUS对材料制备过程进行数值模拟,揭示了界面厚度、纤维体积分数、制备温度等参数对纤维、基体热残余应力分布的影响规律,分析了热残余应力对复合材料力学性能的影响.研究结果能够为C/SiC复合材料的设计、分析及微纳力学性能试验提供理论支持.
关键词:
C/SiC复合材料
,
单胞模型
,
热残余应力
,
数值模拟
,
内聚力模型
