界面厚度对双丝拉拔混凝土力学性能的影响
发布时间：2018-12-25 19:27
【摘要】：考虑三维状态下界面、钢丝和混凝土基体三相材料物理力学参数的介观非均匀分布,利用有限元软件建立了双丝拉拔混凝土三维模型,研究了界面厚度对双丝拉拔混凝土力学性能的影响及界面的作用机理,获得试件声发射演化过程图和声发射-位移-荷载曲线,得到峰值荷载、韧性和声发射耗散总能量随界面厚度变化的曲线.研究结果表明,试件的界面越厚,界面传递应力的能力越强,平均界面剪切强度越大,双丝发生脱黏的时间也越晚.此外,适当增加界面的厚度有利于提高双丝试件的拉拔强度和韧性.
[Abstract]:Considering the mesoscopic non-uniform distribution of the physical and mechanical parameters of the three-phase material of steel wire and concrete matrix under the three-dimensional state, a three-dimensional model of double-wire drawing concrete is established by using the finite element software. The influence of interface thickness on mechanical properties of double-wire drawn concrete and the mechanism of interface are studied. The acoustic emission evolution process diagram and acoustic emission displacement-load curve of the specimen are obtained, and the peak load is obtained. The curves of toughness and total energy dissipation of acoustic emission with interface thickness. The results show that the thicker the interface, the stronger the ability of transmitting stress, the greater the average interfacial shear strength, and the later the time of debonding occurs. In addition, the tensile strength and toughness of the double wire specimens can be improved by increasing the thickness of the interface.
【作者单位】： 广州大学土木工程学院;
【基金】：国家自然科学基金资助项目(51678170,51278136) 广州市科技创新平台资助项目(15180005)~~
【分类号】：TU528
本文编号：2391538
[Abstract]:Considering the mesoscopic non-uniform distribution of the physical and mechanical parameters of the three-phase material of steel wire and concrete matrix under the three-dimensional state, a three-dimensional model of double-wire drawing concrete is established by using the finite element software. The influence of interface thickness on mechanical properties of double-wire drawn concrete and the mechanism of interface are studied. The acoustic emission evolution process diagram and acoustic emission displacement-load curve of the specimen are obtained, and the peak load is obtained. The curves of toughness and total energy dissipation of acoustic emission with interface thickness. The results show that the thicker the interface, the stronger the ability of transmitting stress, the greater the average interfacial shear strength, and the later the time of debonding occurs. In addition, the tensile strength and toughness of the double wire specimens can be improved by increasing the thickness of the interface.
【作者单位】： 广州大学土木工程学院;
【基金】：国家自然科学基金资助项目(51678170,51278136) 广州市科技创新平台资助项目(15180005)~~
【分类号】：TU528
【相似文献】
相关硕士学位论文 前1条
1 曾向荣;间距和埋深对双丝拉拔过程影响的细观力学研究[D];广州大学;2016年
，本文编号：2391538
本文链接：https://www.wllwen.com/kejilunwen/huagong/2391538.html
