Experimental verification of yield strength of polymeric line contact structures
Experimental verification of yield strength of polymeric line contact structures
复制标题
聚合物线接触结构屈服强度的实验验证
DOI：
10.1016/j.polymertesting.2017.08.012
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发表时间：
2017
期刊：
影响因子：
5.1
通讯作者：
Ma Shaopeng
中科院分区：
文献类型：
--
作者：
Zhu Haibin;He Zhifeng;Zhao Yingtao;Ma Shaopeng
高分子线接触结构在工程应用中的应用越来越广泛，因此确定结构的屈服强度具有重要意义。然而，试验研究表明，目前工程上对屈服强度的预测相对于结构的实际屈服行为提供了保守的结果。在本研究中，提出了一种更准确的线接触结构屈服强度的评估，更重要的是，这种评估得到了基于光学全场测量的一系列专门设计的线接触测试的验证。具体地，通过在不同加载水平下加载和卸载聚合线接触结构来检验该评估的有效性，并且通过对由不同聚合物材料制成的线接触结构进行单一加载直到发生显著的整体塑性变形来验证其准确性。实验结果证实，这种屈服强度评估方法能够准确地确定线接触结构的屈服行为。
Polymeric line contact structures are increasingly being used in engineering applications, so that the determination of the yield strength of the structures is of great importance. However, experimental investigation has shown that the current prediction of the yield strength in engineering provides conservative results relative to the actual yield behaviour of the structures. In the present study, a more accurate assessment for the yield strength of a line contact structure is proposed and, more importantly, this assessment was verified by a series of specially designed line contact tests based on optical full-field measurements. Specifically, the validity of this proposed assessment was examined by loading and unloading a polymeric line contact structure at different loading levels, and its accuracy was validated by singly loading line contact structures made from different polymeric materials until the occurrence of significant global plastic deformation. The experimental results confirmed that this proposed yield strength assessment enables accurate determination of the yield behaviour of line contact structures.