基于线弹性断裂力学ABS树脂断裂行为分析表征
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摘要
通过系列不同的丙烯腈-丁二烯-苯乙烯共聚物(ABS)树脂缺口冲击实验,运用线弹性断裂力学理论对实验数据进行分析和表征,以确定在ABS树脂实际的使用或加工过程中,试样形状对材料性能的影响。实验结果表明:冲击功随缺口深度、跨距的增加而降低,随缺口底部曲率半径、厚度的增大而增大;临界能量释放率随缺口深度、曲率半径、厚度的增大而增大,随跨距的增大而降低。材料的力学行为受到材料几何形状的影响,冲击功、临界能量释放率受形状、缺陷影响。
The experimental data were analyzed and characterized based on linear elastic fracture mechanics theory to determine the effect of sample shape on material properties during the actual use or processing of acrylonitrile butadiene styrene(ABS) resin,through a series of different notch impact test of the ABS resin.The experimental results show that the impact energy decreased with the increasingly notch depth and span; and increased with the increasingly curvature radius and thickness. The critical energy release rate raised with the increasingly notch depth, the curvature radius and the thickness; and decreased with the increasingly span.The mechanical behavior of the material was affected by the geometry of the material. The impact energy and critical energy release rate were affected by the shape and defects.
The experimental data were analyzed and characterized based on linear elastic fracture mechanics theory to determine the effect of sample shape on material properties during the actual use or processing of acrylonitrile butadiene styrene(ABS) resin,through a series of different notch impact test of the ABS resin.The experimental results show that the impact energy decreased with the increasingly notch depth and span; and increased with the increasingly curvature radius and thickness. The critical energy release rate raised with the increasingly notch depth, the curvature radius and the thickness; and decreased with the increasingly span.The mechanical behavior of the material was affected by the geometry of the material. The impact energy and critical energy release rate were affected by the shape and defects.
引文
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[5] GRIFFITH A A.The phenomena of rupture and flow in solids[J].Philosophical Transactions of the Royal Society of London,Series A,Containing Papers of A Mathematical or Physical Character,1921,221:163-198.
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[7] 文阳阳,国凤林.改进的Irwin模型及裂尖塑性区对断裂行为的影响[J].力学季刊,2018,39(3):513-522.
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