| 杨立云*,杨仁树,许鹏.爆炸载荷下非透明介质断裂的焦散线实验方法[J].实验力学,2012,27(6):757~763 |
| 爆炸载荷下非透明介质断裂的焦散线实验方法 |
| Experimental Method of Caustics for Non-transparent Medium Fracture under Blasting Load |
| 投稿时间：2012-03-29 修订日期：2012-06-20 |
| DOI： |
| 中文关键词: 爆炸载荷 焦散线 非透明介质 人造石 聚氯乙烯 |
| 英文关键词:blasting load caustics non-transparent medium artificial stone polyvinylchloride (PVC) |
| 基金项目:国家自然科学煤炭联合基金重点项目(No.51134025)和中央高校基本科研业务费项目(No.2011QL06)资助 |
|
| 摘要点击次数: 1206 |
| 全文下载次数: 814 |
| 中文摘要: |
| 首次把焦散线实验方法应用于非透明介质在爆炸载荷作用下的断裂问题的研究。在采用DDGS-Ⅱ型多火花式高速摄影和反射式焦散线光路系统基础上,改进了镜面移植的试件加工方法,实现了较大面积的镜面移植;设计了可多角度调节的爆炸加载架,引进切槽控制爆破技术,满足了爆生裂纹穿过镜面区的要求和摄影记录测量要求。并应用该实验方法,进行了两种非透明介质(人造石和PVC)爆炸致裂的焦散线实验,得到爆生裂纹在人造石和PVC试件扩展过程中不同时刻的焦散线照片,分析了人造石试件中爆生裂纹的运动学和力学行为特征。爆炸加载反射式焦散线实验方法拓展了焦散线实验的应用范畴,为研究非透明介质的爆炸动态断裂问题提供了方法。 |
| 英文摘要: |
| Using DDGS-Ⅱ multi-spark high speed photography and reflected caustics optical path, experimental caustics method is firstly applied to fracture study in non-transparent medium under blasting load. Larger area mirror transplanting was achieved based on improving mirror-transplanting method for specimen fabrication. Based on introducing notch-controlled blasting technology and designing a blast loading frame with multi-angle adjusting function, blast-induced-crack propagating path can be controlled to pass through the mirror area and can be recorded successfully by high speed photography. Using this method, fracture in two non-transparent mediums (artificial stone and PVC) was studied successfully and photos describing blast-induced-crack propagation in artificial stone and PVC specimens at different moments were obtained. Kinematics and mechanical behavior characteristics of blast-induced-crack in artificial stone specimen were analyzed. Experimental method of caustics for non-transparent medium fracture under blasting load expands the application of caustics and is helpful to the study of fracture in non-transparent medium under blasting load. |
| 查看全文 下载PDF阅读器 |
| 关闭 |
|
|
|
|
|
