Volume dilatation in a polycarbonate blend at varying strain rates
Volume dilatation in a polycarbonate blend at varying strain rates
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不同应变率下聚碳酸酯共混物的体积膨胀
DOI：
10.1140/epjst/e2012-01598-x
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
F. Huberth
中科院分区：
文献类型：
--
作者：
S. Hiermaier;F. Huberth
受冲击载荷的聚合物在其弹性、塑性和破坏行为中表现出各种应变率相关的机械性能。与纯晶体材料相比，聚合物材料的体积在不可逆变形下会发生显著变化。在本文中，进行单轴拉伸试验，以测量在聚碳酸酯-丙烯腈-丁二烯-苯乙烯（PC-ABS）Bayblend T65的膨胀。在0.1和500 [mm/s]的变形速度下测量膨胀的累积。用一对两个高速摄像机进行仪器化，观察样品中的体积段。将体积变化量化为节段的变形体积和初始体积之间的关系。实验结果表明，测量的折射率对本构模型具有重要意义。这是特别证明了通过比较应力应变关系来自两个相机的角度与等容关系的基础上单表面观察相同的实验。
Impact loaded polymers show a variety of strain-rate dependent mechanical properties in their elastic, plastic and failure behaviour. In contrast to purely crystalline materials, the volume of polymeric materials can significantly change under irreversible deformations. In this paper, uni-axial tensile tests were performed in order to measure the dilatation in the Polycarbonate-Acrylnitril-Butadien-Styrol (PC-ABS) Bayblend T65. The accumulation of dilatation was measured at deformation speeds of 0.1 and 500 [mm/s]. Instrumented with a pair of two high-speed cameras, volume segments in the samples were observed. The change in volume was quantified as relation between the deformed and initial volumes of the segments. It was observed that the measured dilatations are of great significance for the constitutive models. This is specifically demonstrated through comparisons of stress-strain relations derived from the two camera-perspectives with isochoric relations based on single-surface observations of the same experiments.