静力荷载作用下微观负泊松比锚杆的本构模型
Constitutive Model of Micro Negative Poisson's Ratio Anchor Bolts under Static Loading
张伟 1赵亮 2陈峰 3陶志刚 4崔龙飞5
作者信息
- 1. 河南科技大学土木建筑学院,河南洛阳 471023
- 2. 河南科技大学土木建筑学院,河南洛阳 471023;南阳理工学院河南省冲击与工程结构灾害动力学国际联合实验室,河南南阳 474150
- 3. 南阳理工学院河南省冲击与工程结构灾害动力学国际联合实验室,河南南阳 474150
- 4. 中国矿业大学(北京)力学与建筑工程学院,北京 100083
- 5. 洛阳爱众人力资源服务有限公司工程技术部,河南洛阳 471000
- 折叠
摘要
微观负泊松比(NPR)锚杆具有高应力和高均匀延伸的力学特性,但其本构模型的研究还不够深入.故对此开展了静力荷载作用下微观NPR锚杆的拉伸试验,研究了静力拉伸过程中微观NPR锚杆的应变场演化规律,得到了静力荷载作用下微观NPR锚杆的应力-应变关系曲线.基于试验结果,建立了微观NPR锚杆的本构模型,并将该本构模型嵌入到ABAQUS有限元软件中,开展了静力荷载作用下微观NPR锚杆的数值分析.对比试验结果和数值分析的结果可以看出,两者具有较好的一致性,表明所建立的本构模型能够较好地表现微观NPR锚杆的力学特性.
Abstract
Micro negative poisson's rotio(NPR)anchor bolts have mechanical properties of high stress and high uniform extension,however,the study of its constitutive modelling has not been particularly in-depth.Therefore,the tensile test of micro NPR anchor bolts under static loading was carried out,the strain field evolution law of micro NPR anchor bolts during static tensile was investigated,and the stress-strain relationship curve of micro NPR anchor bolts was obtained.Based on the experimental results,the constitutive model of the micro NPR anchor bolts was established,and the constitutive model was embedded into the ABAQUS finite element software,the numerical analyses of micro NPR anchor bolts under static loading were carried out.Comparison of the experimental results and the results of numerical analyses shows that they are in good agreement,indicating that the established constitutive model can better represent the mechanical properties of micro NPR anchor bolts.
关键词
微观NPR锚杆/静力拉伸/本构模型Key words
micro-NPR/static tensile/constitutive model引用本文复制引用
基金项目
国家自然科学基金(42377154)
河南省科技攻关项目(232102320238)
出版年
2024
国家科技期刊平台
NSTL
万方数据