###
DOI:
工程科学与技术:2008,40(1):38-43
本文二维码信息
码上扫一扫!
高温后大理岩动态劈裂试样的破坏应变
(四川大学 建筑与环境学院,四川 成都 610065)
Failure Strain of Brazilian Disc Samples of Marble after High Temperature Under Dynamic Split Tests
摘要
图/表
参考文献
相似文献
附件
本文已被:浏览 1461次   下载 5
投稿时间:2007-01-12    
中文摘要: 巴西圆盘是用于测定大理岩等脆性材料拉伸性质的一种常用试样,为了研究温度对岩石在动态拉伸条件下破坏应变的影响规律,利用直径100 mm的分离式Hopkinson压杆对一系列大理岩巴西圆盘进行了动态劈裂试验,通过粘贴在试样中心处的应变片,得到了不同类型的试样在不同应变率下的破坏应变。结果表明,随着应变率的增加,破坏应变随之增加,但是没有经过高温处理(A类)和经过50 ℃恒温处理(50A类)岩石的增幅比较缓慢,经过100 ℃恒温处理(100A类)岩石的增幅则比较明显,且显著大于A类和50A类岩石;岩石在经过50
Abstract:Brazilian disc is popular sample used for the measurement of tensile properties of brittle materials like marble. In order to study the laws of the failure strains after temperature treatment under dynamic tension, the dynamic split tests of a series of Brazilian disc of marble were performed using split Hopkins pressure bar(SHPB) of 100 mm diameter. The failure strains of all types of samples in different strain rate were obtained with strain gauges stuck on the center of the sample and the test results indicated that the failure strains of all types of samples are increased with the increment of the strain rate, and the failure strains of marble without heat treatment (type A) and those with a constant temperature treatment at 50 ℃(type 50A) are increased slightly while those with a constant temperature treatment at 100 ℃(type 100A) are increased remarkably and the increment is bigger than that of type A and type 50A. The failure strains of the samples with a constant temperature treatment at 50 ℃ are similar with those without any heat treatment, and after the constant temperature treatment at 100 ℃ the failure strains are more than those of the others types. The failure strains and the strain rates are increased gradually with the increment of projectile speed, and when the speeds are in the same level, the failure strains and the strain rates of the samples with the constant temperature treatment at 100 ℃ are higher than those of the others, and the difference between them are increased gradually with the increment of the speed.
文章编号:20080108     中图分类号:    文献标志码:
基金项目:国家自然科学基金资助项目(10472075);国家自然科学基金重大资助项目(50490272)
作者简介:
引用文本:
宋小林 ,王启智,谢和平.高温后大理岩动态劈裂试样的破坏应变[J].工程科学与技术,2008,40(1):38-43.
.Failure Strain of Brazilian Disc Samples of Marble after High Temperature Under Dynamic Split Tests[J].Advanced Engineering Sciences,2008,40(1):38-43.