干旱区生态环境知识资源中心(Arid): 沙漠砂混凝土动态力学性能数值模拟

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	沙漠砂混凝土动态力学性能数值模拟
其他题名	Numerical simulation of dynamic mechanical behaviors of desert sand concrete
	刘海峰; 王亿颖; 宋建夏
来源期刊	水利学报
ISSN	0559-9350
出版年	2016
卷号	47 期号:4 页码:493-500,508
中文摘要	沙漠砂混凝土动态力学性能非常复杂,利用SHPB进行沙漠砂混凝土动态冲击压缩试验,分析冲击速度对沙漠砂混凝土动态性能影响规律。编写沙漠砂混凝土圆形骨料随机分布程序,运用ANSYS/LS-DYNA软件对试件尺寸、冲击速度、粗骨料体积含量和粗骨料颗粒大小不同沙漠砂混凝土动态破坏过程进行模拟,分析试件尺寸、冲击速度、粗骨料体积含量和粗骨料颗粒大小对沙漠砂混凝土动态力学性能的影响规律。数值模拟表明:沙漠砂混凝土具有明显尺寸效应;随着粗骨料颗粒最小粒径增大,沙漠砂混凝土峰值应力逐渐减小;随着粗骨料颗粒最大粒径增大,沙漠砂混凝土峰值应力呈先增大后减小趋势;随着粗骨料体积含量增大,沙漠砂混凝土峰值应力呈先增大后减小趋势,数值模拟结果为沙漠砂混凝土优化设计提供依据。
英文摘要	The dynamic mechanical behaviors of desert sand concrete are very complicated. 74mm-diameter Split Hopkinson pressure bar (SHPB) was used to study the mechanical behaviors of desert sand concrete under various impact speeds in this paper. The influence of impact speed on the dynamic mechanical behav? iors of desert sand concrete was analyzed. A circular aggregate random distribution program was designed to simulate the dynamic failure process of desert sand concrete with different specimen dimension, impact speed,particle size of coarse aggregate and volume fraction of coarse aggregate by means of ANSYS/LS-DY? NA software. The influences of specimen dimension,impact speed,particle size of coarse aggregate and vol? ume fraction of coarse aggregate on the dynamic mechanical behaviors of desert sand concrete were ana? lyzed. Numerical simulation shows that desert sand concrete has obvious size effect. With the increase of the minimum value of particle size of coarse aggregate,the peak stress of desert sand concrete declines. Whereas,with the increase of the maximum value of particle size of coarse aggregate,the peak stress of desert sand concrete increases firstly,then declines. The peak stress of desert sand concrete increases first? ly,and then declines with the volume fraction of coarse aggregate,which provides basis for optimization and design of desert sand concrete.
中文关键词	沙漠砂混凝土 ; 动态力学性能 ; 数值模拟 ; 峰值应力 ; 冲击速度
英文关键词	desert sand concrete dynamic mechanical behavior numerical simulation peak stress im? pact speed
语种	中文
国家	中国
收录类别	CSCD
WOS类目	MECHANICS
WOS研究方向	Mechanics
CSCD记录号	CSCD:5704584
来源机构	宁夏大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/234916
作者单位	宁夏大学土木与水利工程学院, 银川, 宁夏 750021, 中国
推荐引用方式 GB/T 7714	刘海峰,王亿颖,宋建夏. 沙漠砂混凝土动态力学性能数值模拟[J]. 宁夏大学,2016,47(4):493-500,508.
APA	刘海峰,王亿颖,&宋建夏.(2016).沙漠砂混凝土动态力学性能数值模拟.水利学报,47(4),493-500,508.
MLA	刘海峰,et al."沙漠砂混凝土动态力学性能数值模拟".水利学报 47.4(2016):493-500,508.