基于三维断裂理论的DX 001有机玻璃表面裂纹疲劳扩展模拟与实验研究  

Simulation and experimental study on fatigue propagation of DX 001 plexiglass surface crack based on three-dimensional theory

作　　者：戴美想[1] 李业媛 俞哲 于培师 Dai Meixiang;Li Yeyuan;Yu Zhe;Yu Peishi(Jiangsu Productivity Promotion Center, Jiangsu Nanjing, 210042,China;School of Mechanical Engineering, Jiangnan University, Jiangsu Wuxi, 214122,China)

机构地区：[1]江苏省生产力促进中心,江苏南京210042 [2]江南大学机械工程学院,江苏无锡214122

出　　处：《机械设计与制造工程》2021年第11期107-111,共5页Machine Design and Manufacturing Engineering

基　　金：中国博士后科学基金资助项目(2018M630513)。

摘　　要：针对有机玻璃结构在服役中易产生表面裂纹而导致结构破坏的问题,首先利用标准试件测定该材料在不同应力比下的裂纹扩展数据,基于三维裂纹扩展理论得到该材料几何、应力比无关的真实扩展速率。然后利用专业裂纹分析软件对典型疲劳载荷下的三维表面裂纹扩展进行预测研究。最后基于精密加工技术制备含三维表面裂纹试件,进行不同载荷下的疲劳扩展实验,验证了模拟预测寿命和裂纹形貌的准确性。To assess the structural damage caused by surface cracks in a plexiglass structure,the crack propagation data of the material under different stress ratio are measured by using standard specimens,and the true crack growth rate of the material is obtained based on the three-dimensional fracture theory.The professional crack analysis software is used to predict the three-dimensional surface crack propagation under typical fatigue load.The specimens with three-dimensional surface cracks are prepared based on precision machining technology,and the fatigue growth experiments under different loadings are carried out to verify the accuracy of simulation and prediction of life and crack morphology.

关 键 词：三维理论 表面裂纹 疲劳扩展寿命 有机玻璃 

分 类 号：TH122[机械工程—机械设计及理论] O346[理学—固体力学]