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首页> 外文期刊>Journal of Materials Engineering and Performance >Ball Indentation Analysis of a Tough Polymer Sheet
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Ball Indentation Analysis of a Tough Polymer Sheet

机译：韧性聚合物片材的球压痕分析

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摘要

The ball indentation process of tough polymer sheet clamped at its periphery has various particular response characteristics. These characteristics of the polymer sheet have been discussed in comparison to the ductile metal sheet undergoing a similar indentation process. The ball indentation process of polymer sheet is also mathematically analyzed to evaluate fracture toughness and distribution of the energy used. This analysis is useful for designers to foresee the pre-and post-peak load response and possible aftermath. The information and results presented may be useful to meet some particular design and utility demands. Data for a number of tests was recorded and analyzed and it was observed that a particular load and corresponding displacement, fracture first begins within the dimple. The fracture toughness and energy used were calculated using a mathematical model developed for computations. The energy-based equations of Rigid-Plastic Fracture Mechanics have been used for computational model for steel balls indentation, perforation, and fracture propagation. The dependence of various parameters on the indenting ball diameter and bearing of the anisotropy due to sheet extrusion is elaborated.
机译：夹持在其外围的硬质聚合物片材的球压痕过程具有各种特殊的响应特性。与经历类似压痕过程的可延展金属板相比，已经讨论了聚合物板的这些特性。还对聚合物片材的球压痕过程进行了数学分析，以评估断裂韧性和所用能量的分布。该分析对于设计人员预测峰前和峰后的负载响应以及可能的后果很有用。呈现的信息和结果对于满足某些特定的设计和实用程序需求可能很有用。记录并分析了许多测试的数据，观察到特定的载荷和相应的位移首先在凹坑内开始断裂。使用开发用于计算的数学模型计算断裂韧性和能量。刚塑性断裂力学的基于能量的方程已用于钢球压痕，穿孔和断裂扩展的计算模型。阐述了各种参数对压入球直径和由于片材挤出而引起的各向异性的依赖性。

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