期刊
APPLIED SCIENCES-BASEL
卷 11, 期 5, 页码 -出版社
MDPI
DOI: 10.3390/app11052104
关键词
brittle fracture; U-notch; compressive loading; equivalent material concept (EMC); maximum tangential stress (MTS) criterion; mean stress (MS) criterion
This study investigates the fracture behavior of notched polymeric specimens under compressive stresses through experimental and theoretical methods. The use of the Equivalent Material Concept (EMC) in combination with the Maximum Tangential Stress (MTS) and Mean Stress (MS) criteria accurately predicts the load-carrying capacity of the specimens without the need for experimental calibration.
In this paper, the fracture of notched polymeric specimens under compressive stresses was investigated both experimentally and theoretically. In the experimental section, to determine the load-carrying capacity (LCC) of U-notched specimens made of general-purpose polystyrene (GPPS) and polymethyl-methacrylate (PMMA) polymers, tests were performed on notched square samples under compression, i.e., negative mode I loading. In the observation of the nonlinear behavior of the two polymers in the standard compressive tests, for the first time, the equivalent material concept (EMC) was used under compressive loading to theoretically estimate the critical stresses of the two polymers, which were shown to be significantly different from the ultimate strengths obtained from the standard compression tests. By linking the EMC to the maximum tangential stress (MTS) and mean stress (MS) criteria, the LCC of the notched specimens was predicted. The outcomes are twofold: First, MTS, MS, EMC-MTS, and EMC-MS criteria provide accurate predictions of the experimental critical loads observed in the U-notched polymeric specimens; second, the combination of the EMC with the MTS and MS criteria, allow such predictions to be obtained without any need for experimental calibration.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据