STUDIES ON INTERFACIAL PROPERTY OF COMPOSITE BASED ON THE SHEAR STRESS CRITERION WITH CYCLIC LOADING PROCESS
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- 英文论文题名：STUDIES ON INTERFACIAL PROPERTY OF COMPOSITE BASED ON THE SHEAR STRESS CRITERION WITH CYCLIC LOADING PROCESS
- 论文作者：Peng-yu PEI ; Wen-xue CHANG ; Hai QING ; Cun-fa GAO
- 英文论文作者：Peng-yu PEI ; Wen-xue CHANG ; Hai QING ; Cun-fa GAO ; State Key Laboratory of Mechanics and Control of Mechanical Structures ; Nanjing University of Aeronautics and Astronautics
- 年：2016
- 作者机构：State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics;
- 英文论文关键词：Residual Thermal Stress ; Reloading Process ; Maximum shear stress criterion ; Unloading Process
- 会议召开时间：2016-10-21
- 会议录名称：2016年全国压电和声波理论及器件应用研讨会论文摘要集
- 英文会议录名称：Abstract Book of 2016 Symposium on Piezoelectricity, Acoustic Waves and Device Applications
- 语种：英文
- 分类号：TB33
- 学会代码：AGLU
- 会议名称：2016年全国压电和声波理论及器件应用研讨会
- 会议地点：中国陕西西安
- 主办单位：中国力学学会、中国声学学会、IEEE UFFC分会
- 学会名称：中国力学学会
- 页数：2
- 文件大小：90k
- 原文格式：D
- 会议级别：全国
摘要
Background, Motivation and Objective It's well known that the efficiency of load transfer across the interface plays a significant role on the mechanical behavior of fiber-reinforced composites. Several experimental tests have been designed to measure the interfacial properties of composite, one of which, i.e., single fiber pullout test has been widely used to measure the interfacial strength and friction stress. The purpose of the present study is to extend the application of the single-fiber pullout test in evaluating the interfacial properties. Statement of Contribution/Methods Theoretical analyses are presented for the interfacial properties of composites based on the shear stress criterion with cyclic loading process, and also for the single-fiber pullout with unloads and reloading process based on the shear stress debonding criterion and the modified analysis of stress. The influence of radial residual thermal stress, the volume content and the fiber pullout rate on the applied stress and the relative displacement have been discussed, respectively. The influence of fiber pullout rate on interfacial frictional coefficient is also taken into consideration. Results Several numerical examples are presented based on a modified theory model for a hypothetical glass/epoxy composite system. Discussion and Conclusions The calculation results show that the relative displacement increases with the increase of the residual thermal stress under the same debonding length, and the relative displacements at u=l decreases with the increase of the fiber pullout rate while increases with the increase of fiber volume contents. It is also found that the applied stress can cause further debonding increasing with the increase of the radial residual thermal stress and the fiber volume content, while it decreases with the increase of the fiber pull-out rate.
Background, Motivation and Objective It's well known that the efficiency of load transfer across the interface plays a significant role on the mechanical behavior of fiber-reinforced composites. Several experimental tests have been designed to measure the interfacial properties of composite, one of which, i.e., single fiber pullout test has been widely used to measure the interfacial strength and friction stress. The purpose of the present study is to extend the application of the single-fiber pullout test in evaluating the interfacial properties. Statement of Contribution/Methods Theoretical analyses are presented for the interfacial properties of composites based on the shear stress criterion with cyclic loading process, and also for the single-fiber pullout with unloads and reloading process based on the shear stress debonding criterion and the modified analysis of stress. The influence of radial residual thermal stress, the volume content and the fiber pullout rate on the applied stress and the relative displacement have been discussed, respectively. The influence of fiber pullout rate on interfacial frictional coefficient is also taken into consideration. Results Several numerical examples are presented based on a modified theory model for a hypothetical glass/epoxy composite system. Discussion and Conclusions The calculation results show that the relative displacement increases with the increase of the residual thermal stress under the same debonding length, and the relative displacements at u=l decreases with the increase of the fiber pullout rate while increases with the increase of fiber volume contents. It is also found that the applied stress can cause further debonding increasing with the increase of the radial residual thermal stress and the fiber volume content, while it decreases with the increase of the fiber pull-out rate.
Background, Motivation and Objective It's well known that the efficiency of load transfer across the interface plays a significant role on the mechanical behavior of fiber-reinforced composites. Several experimental tests have been designed to measure the interfacial properties of composite, one of which, i.e., single fiber pullout test has been widely used to measure the interfacial strength and friction stress. The purpose of the present study is to extend the application of the single-fiber pullout test in evaluating the interfacial properties. Statement of Contribution/Methods Theoretical analyses are presented for the interfacial properties of composites based on the shear stress criterion with cyclic loading process, and also for the single-fiber pullout with unloads and reloading process based on the shear stress debonding criterion and the modified analysis of stress. The influence of radial residual thermal stress, the volume content and the fiber pullout rate on the applied stress and the relative displacement have been discussed, respectively. The influence of fiber pullout rate on interfacial frictional coefficient is also taken into consideration. Results Several numerical examples are presented based on a modified theory model for a hypothetical glass/epoxy composite system. Discussion and Conclusions The calculation results show that the relative displacement increases with the increase of the residual thermal stress under the same debonding length, and the relative displacements at u=l decreases with the increase of the fiber pullout rate while increases with the increase of fiber volume contents. It is also found that the applied stress can cause further debonding increasing with the increase of the radial residual thermal stress and the fiber volume content, while it decreases with the increase of the fiber pull-out rate.
引文