Fracture of Concrete Subjected to Impact Loading

材料科学 夏比冲击试验 灰浆 强度因子 复合材料 断裂力学 裂纹扩展阻力曲线 结构工程 裂缝闭合 增长率 脆性 断裂(地质)
作者
Reji John,Surendra P. Shah
出处
期刊:Cement Concrete and Aggregates 卷期号:8 (1): 24-32 被引量:26
标识
DOI:10.1520/cca10050j
摘要

To evaluate the response of concrete structures subjected to impact or impulsive loading, it is essential to know how cracks propagate under such dynamic loading conditions. Single-edge notched beams were subjected to varying rates of loading to establish the stress intensity factor K1 versus crack velocity V relationship for mortar and concrete. Impact tests were performed using a modified instrumented Charpy test system. During loading, the rate of crack growth was obtained using special brittle Krak gages. Results indicate the following: (1) For a given strain rate the extent of pre-peak crack growth is larger for concrete than for mortar, and the amount of pre-peak crack growth decreases with increase in strain-rate. (2) Decrease in pre-peak nonlinearity at higher strain rates is probably caused by the decrease in amount of slow (pre-peak) crack growth. Hence, the linear-elastic fracture mechanics (LEFM) approach at high rates may be valid. (3) To obtain realistic size independent value of stress intensity factor, slow crack growth should be included in the calculation for cement composites. (4) The relationship between log K1 and log V is nonlinear especially at the higher rates of loading, for both mortar and concrete.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
PDF的下载单位、IP信息已删除 (2025-6-4)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
爱啥啥完成签到,获得积分10
1秒前
nanchuangjiao完成签到,获得积分20
1秒前
Rose林完成签到,获得积分10
1秒前
如此纠结完成签到,获得积分10
1秒前
2秒前
汉堡包应助健康好运和采纳,获得10
2秒前
一二三四完成签到,获得积分10
2秒前
2秒前
清新的篮球完成签到,获得积分10
2秒前
2秒前
上官若男应助yatudouya采纳,获得10
2秒前
3秒前
穆佳琴完成签到,获得积分20
3秒前
3秒前
3秒前
非常发布了新的文献求助10
4秒前
活泼纲完成签到,获得积分10
4秒前
qi发布了新的文献求助10
4秒前
王志松发布了新的文献求助10
5秒前
稳重十三完成签到,获得积分10
5秒前
xxxx完成签到,获得积分10
5秒前
6秒前
风中的寄风完成签到,获得积分10
6秒前
6秒前
开心的眼睛完成签到,获得积分10
7秒前
lucy发布了新的文献求助20
7秒前
7秒前
SciGPT应助科研通管家采纳,获得10
8秒前
ll应助科研通管家采纳,获得10
8秒前
量子星尘发布了新的文献求助10
8秒前
打打应助科研通管家采纳,获得10
8秒前
彭于晏应助科研通管家采纳,获得10
8秒前
在水一方应助科研通管家采纳,获得10
8秒前
ll应助科研通管家采纳,获得10
8秒前
苏卿应助科研通管家采纳,获得30
8秒前
8秒前
9秒前
9秒前
9秒前
9秒前
高分求助中
A new approach to the extrapolation of accelerated life test data 1000
Cognitive Neuroscience: The Biology of the Mind 1000
Technical Brochure TB 814: LPIT applications in HV gas insulated switchgear 1000
ACSM’s Guidelines for Exercise Testing and Prescription, 12th edition 500
Picture Books with Same-sex Parented Families: Unintentional Censorship 500
Nucleophilic substitution in azasydnone-modified dinitroanisoles 500
不知道标题是什么 500
热门求助领域 (近24小时)
化学 材料科学 医学 生物 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 遗传学 基因 物理化学 催化作用 冶金 细胞生物学 免疫学
热门帖子
关注 科研通微信公众号,转发送积分 3970240
求助须知:如何正确求助?哪些是违规求助? 3514997
关于积分的说明 11176725
捐赠科研通 3250268
什么是DOI,文献DOI怎么找? 1795244
邀请新用户注册赠送积分活动 875725
科研通“疑难数据库(出版商)”最低求助积分说明 805004