南京理工大学学报（自然科学版）2024，Vol.48Issue(2)：141-147,7.DOI:10.14177/j.cnki.32-1397n.2024.48.02.003
刚性弹侵彻缩比实验尺寸效应分析
Analysis of size effect for scaled penetration test of rigid projectiles
徐天涵 1谢方 2何勇3
作者信息
- 1. 陆军工程大学爆炸冲击防灾减灾国家重点实验室,江苏南京 210007
- 2. 武汉理工大学道路桥梁与结构工程湖北省重点实验室,湖北武汉 430070
- 3. 南京理工大学工程安全防护技术研究所,江苏南京 210094
- 折叠
摘要
Abstract
The size effect of scaled penetration tests is an important issue affecting the application of the test results.In order to improve the accuracy of scaled test results converting to prototype tests,by analyzing the theoretical formula of penetration depth of rigid projectile,the main factors causing size effect are clarified.The experimental determination methods of diameter coefficient and other key parameters in penetration depth formula are given.The theory and method of converting the results of model tests to prototype test are given.The results show that for rate-dependent materials,strain rate leads to the size effect.For rate-independent materials,the scale itself also leads to size effect,which is essentially due to the size effect in the development of medium failure.The smaller the scale,the more obvious the size effect.The size effect is also related to the properties of the material and the diameter of the prototype projectile.For the experiment with a scale of 0.1,for safety reasons,the diameter coefficient is taken as 1.3.The material parameters related to the size effect can be obtained by two sets of penetration tests with different scales.关键词
刚性侵彻/缩比实验/尺寸效应/弹径系数Key words
rigid penetrating/scaled tests/size effect/projectile-diameter factor分类
建筑与水利引用本文复制引用
徐天涵,谢方,何勇..刚性弹侵彻缩比实验尺寸效应分析[J].南京理工大学学报（自然科学版）,2024,48(2):141-147,7.
