摘要
应力-应变特性是聚脲金属复合层板疲劳强度设计和分析的基础,因此提出了聚脲金属复合层板应力-应变特性仿真及验证方法。在复合层板有限元模型的聚脲层和金属层之间插入cohesive单元模拟两者之间的脱粘工艺;在拉伸试验的基础上,采用Ogden二阶超弹性模型建立聚脲本构模型,并分别建立金属弹、塑性和损伤阶段的本构模型,将建立的本构模型及参数应用于有限元模型中完成仿真。结果表明:试验与仿真应力-应变曲线的弹性模量、屈服强度和抗拉强度误差均在5%以内。两者的吻合程度较好,验证了建立的聚脲金属复合层板应力-应变特性仿真及验证方法的有效性。
The stress-strain characteristics are the basis for the fatigue strength design and analysis of polyurea metal composite laminates.Therefore,a simulation and verification method for the stress-strain characteristics of polyurea metal composite laminates is proposed.Inserting cohesive elements between the polyurea layer and the metal layer in the finite element model of composite laminates to simulate the debonding process between the two;on the basis of tensile testing,an Ogden second-order hyperelastic model was used to establish a constitutive model for polyurea,and constitutive models for metal elasticity,plasticity,and damage stages were established separately.The established constitutive models and parameters were applied to the finite element model for simulation.The results show that the errors in elastic modulus,yield strength,and tensile strength of the stress-strain curves in the experiment and simulation are all within 5%.The good agreement between the two validates the effectiveness of the established simulation and verification method for the stress-strain characteristics of polyurea metal composite laminates.
作者
邹喜红
张艺巍
袁冬梅
向刚
谭云龙
邱伟本
王秦锋
熊锋
ZOU Xihong;ZHANG Yiwei;YUAN Dongmei;XIANG Gang;TAN Yunlong;QIU Weiben;WANG Qinfeng;XIONG Feng(Key Laboratory of Advanced Manufacturing Technology for Automotive Components of Ministry of Education,Chongqing University of Technology,Chongqing 400054,China;Chongqing Qingyan Ligong Automotive Testing&Service Co.,Ltd.,Chongqing 401329,China)
出处
《兵器装备工程学报》
北大核心
2025年第7期303-311,共9页
Journal of Ordnance Equipment Engineering
基金
国家自然科学基金项目(52202437)。
关键词
聚脲金属
复合层板
本构模型
应力-应变曲线
仿真验证
polyurea metal
composite layer board
constitutive model
stress-strain curve
simulation verification
