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首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >Elastic and residual stresses around ball indentations on glasses using a micro-photoelastic technique
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Elastic and residual stresses around ball indentations on glasses using a micro-photoelastic technique

机译：使用微光弹性技术在玻璃球凹痕周围产生弹性和残余应力

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摘要

In this study, elastic and residual stresses around ball indentations on soda-lime silicate and silica glasses were measured using a micro-photoelastic imaging system and diamond indenters with different tip radii. Elastic stresses during ball indentation can be compared with classical Hertzian analytical solutions. As a result, it is found that the elastic stresses obtained from birefringence data are in good agreement with the analytical solutions calculated only from elastic moduli and Poisson's ratio of glass and of diamond. The residual stresses have been estimated assuming that the residual stresses satisfy the linear elastic constitutive law. These residual stresses around the indentation imprint without any cracks are compared with the estimated stresses using Yoffe's model and the morphology of subsequent cracks.
机译：在这项研究中，使用微光弹性成像系统和具有不同尖端半径的金刚石压头，测量了钠钙硅酸盐和二氧化硅玻璃上的球形压痕周围的弹性应力和残余应力。球压痕过程中的弹性应力可以与经典的Hertzian分析解决方案进行比较。结果，发现从双折射数据获得的弹性应力与仅由玻璃和金刚石的弹性模量和泊松比计算的解析解非常吻合。假设残余应力满足线性弹性本构律，则可以估算残余应力。使用Yoffe模型和后续裂纹的形态，将压痕上没有任何裂纹的残余应力与估计应力进行比较。

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