摘要
基于断裂力学理论,采用实验为基本研究手段,结合数字图像相关技术和断裂试验,研究UPVC板材在冲击荷载作用下的断裂性能。结果表明,在相同的冲击能作用下,复合型裂纹启裂的时间比纯Ⅰ型裂纹的启裂时间早;纯Ⅰ型裂纹的扩展速度大于复合型裂纹的扩展速度,两种裂纹的扩展速度都随裂纹扩展量的增加而逐渐减小,纯Ⅰ型裂纹按照纯Ⅰ型扩展路径扩展,复合型裂纹按照复合型扩展路径扩展并受Ⅰ型主导;将数字图像技术应用于冲击荷载作用下的断裂问题是切实可行的。
Based on the theory of fracture mechanics,the fracture properties of UPVC sheets under impact load were studied by means of experiments,combined with digital image correlation technology and fracture tests.The results are as follows:Under the same impact energy,the crack initiation time of mixed mode crack is earlier than that of pure mode I crack.The growth speed of pure mode I crack is higher than that of composite crack,and the growth speed of both types of cracks decreases with the increase of crack growth.The pure mode I crack propagates along the pure mode I propagation path.The mixed mode crack propagates along the mixed mode propagation path and is dominated by mode I.It is feasible to apply digital image technology to fracture under impact load.
作者
吕婧
王磊
LYU Jing;WANG Lei(School of Intelligent Manufacturing,Qingdao Huanghai University,Qingdao 266500,Shandong,China;Ceyear Technologies Company Limited,Qingdao 266500,Shandong,China)
出处
《科技和产业》
2023年第14期271-274,共4页
Science Technology and Industry
基金
青岛黄海学院校级课题(2021KJ11)。
