Kolsky Compression Bar Experiments on Brittle Materials
Kolsky Compression Bar Experiments on Brittle Materials
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DOI：
10.1007/978-1-4419-7982-7_3
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发表时间：
2011
期刊：
影响因子：
--
通讯作者：
Weinong W. Chen;B. Song
中科院分区：
文献类型：
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作者：
Weinong W. Chen;B. Song
许多脆性材料以接近线性弹性的方式变形，直到在小应变下破坏。作为Kolsky-bar实验中的试样，这些材料对由于杆不对准或非平行加载表面引起的应力集中非常敏感。为了使线弹性试件在恒定应变率下变形，需要恒定应力率的加载脉冲。本章介绍了脆性试样的特点，介绍了必要的修改，以达到所需的和有效的测试条件的试样上的柯尔斯基杆，并概述了柯尔斯基压杆实验的设计与一步一步的例子脆性材料。
Many brittle materials deform in a manner of nearly linear elasticity until failure at small strains. As specimens in Kolsky-bar experiments, these materials are extremely sensitive to stress concentrations due to bar misalignment or non-parallel loading surfaces. To deform a linear elastic specimen at a constant strain rate, a loading pulse with constant stress rate is needed. This chapter describes the characteristics of brittle specimens, introduces the modifications to Kolsky bar necessary to achieve the desired and valid testing conditions on the specimen, and outlines the design of Kolsky compression bar experiments on brittle materials with step-by-step examples.