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Tensile characterization of graphene nanoplatelet/shape memory alloy/epoxy composites using digital and thermal imaging
Polymer Composites ( IF 4.8 ) Pub Date : 2020-12-02 , DOI: 10.1002/pc.25896 Ugur Kilic 1 , Sherif M. Daghash 2 , Muhammad M. Sherif 3 , Osman E. Ozbulut 1
Polymer Composites ( IF 4.8 ) Pub Date : 2020-12-02 , DOI: 10.1002/pc.25896 Ugur Kilic 1 , Sherif M. Daghash 2 , Muhammad M. Sherif 3 , Osman E. Ozbulut 1
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This article explores the tensile deformation and failure characteristics of a hybrid composite where microscale shape memory alloy (SMA) fibers and nanoscale graphene nanoplatelets (GNPs) were used to reinforce a ductile epoxy matrix. First, the GNPs were incorporated into epoxy system using a hybrid dispersion technique at various weight percentages ranging from 0.25 to 2.50 wt%. The mechanical properties of GNP composites were investigated using monotonic uniaxial tensile tests to failure and were compared to neat epoxy. The GNP concentration that resulted in highest enhancement in tensile properties of the epoxy was identified. Then, the GNP/SMA/epoxy composites were fabricated using a vacuum assisted hand lay‐up technique. The composites were reinforced with SMA fibers at 50% volume ratio and an optimal GNP concentration was added. The tensile response of the developed composites was characterized using full‐field strain measurements captured by a digital image correlation system, while simultaneously the thermal response of the composites was monitored through measurements of an infrared camera. The tensile properties, superelastic response, and failure mechanisms of the developed composites were discussed. Results shows that the developed GNP/SMA/epoxy composites exhibit excellent superelastic characteristics with a maximum strength of 533 MPa and failure elongation of 12.5%.
中文翻译：
使用数字和热成像技术表征石墨烯纳米片/形状记忆合金/环氧树脂复合材料的拉伸特性
本文探讨了混合复合材料的拉伸变形和破坏特性，其中微米级形状记忆合金（SMA）纤维和纳米级石墨烯纳米片（GNP）用于增强可延展的环氧基质。首先，使用混合分散技术将GNP以0.25至2.50 wt％的各种重量百分比掺入环氧体系中。使用单调单轴拉伸试验对GNP复合材料的力学性能进行了研究，并与纯环氧树脂进行了比较。确定了导致环氧树脂的拉伸性能最高增强的GNP浓度。然后，使用真空辅助手糊技术制造GNP / SMA /环氧树脂复合材料。用SMA纤维以50％的体积比增强复合材料，并添加了最佳GNP浓度。使用数字图像相关系统捕获的全场应变测量来表征已开发复合材料的拉伸响应，同时通过红外摄像机的测量来监控复合材料的热响应。讨论了已开发复合材料的拉伸性能，超弹性响应和破坏机理。结果表明，开发的GNP / SMA /环氧树脂复合材料具有优异的超弹性特征，最大强度为533 MPa，破坏伸长率为12.5％。讨论了复合材料的超弹性响应和破坏机理。结果表明，开发的GNP / SMA /环氧树脂复合材料具有优异的超弹性特征，最大强度为533 MPa，破坏伸长率为12.5％。讨论了复合材料的超弹性响应以及破坏机理。结果表明，开发的GNP / SMA /环氧树脂复合材料具有优异的超弹性特征，最大强度为533 MPa，破坏伸长率为12.5％。
更新日期：2020-12-02
中文翻译：
使用数字和热成像技术表征石墨烯纳米片/形状记忆合金/环氧树脂复合材料的拉伸特性
本文探讨了混合复合材料的拉伸变形和破坏特性，其中微米级形状记忆合金（SMA）纤维和纳米级石墨烯纳米片（GNP）用于增强可延展的环氧基质。首先，使用混合分散技术将GNP以0.25至2.50 wt％的各种重量百分比掺入环氧体系中。使用单调单轴拉伸试验对GNP复合材料的力学性能进行了研究，并与纯环氧树脂进行了比较。确定了导致环氧树脂的拉伸性能最高增强的GNP浓度。然后，使用真空辅助手糊技术制造GNP / SMA /环氧树脂复合材料。用SMA纤维以50％的体积比增强复合材料，并添加了最佳GNP浓度。使用数字图像相关系统捕获的全场应变测量来表征已开发复合材料的拉伸响应，同时通过红外摄像机的测量来监控复合材料的热响应。讨论了已开发复合材料的拉伸性能，超弹性响应和破坏机理。结果表明，开发的GNP / SMA /环氧树脂复合材料具有优异的超弹性特征，最大强度为533 MPa，破坏伸长率为12.5％。讨论了复合材料的超弹性响应和破坏机理。结果表明，开发的GNP / SMA /环氧树脂复合材料具有优异的超弹性特征，最大强度为533 MPa，破坏伸长率为12.5％。讨论了复合材料的超弹性响应以及破坏机理。结果表明，开发的GNP / SMA /环氧树脂复合材料具有优异的超弹性特征，最大强度为533 MPa，破坏伸长率为12.5％。
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