研削加工におけるセラミックスのき裂発生, 進展の解析

概要

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A simulation of crack behavior from the initiation to the extension in the brittle work material has been made to appreciate abrasion process in which single abrasion in term of rigid grain was assumed. Non-linear 2-dimensional finite element analysis satisfying a modified point matching condition to the contact problems was carried out. The effects of the grain tip geometry with angular as well as circular on the stress distributions of the work material were also investigated. The calculation suggests that when the grain should penetrate into the work and move stepwise in the lateral direction, the crack might initiate at the maximum principal stress(σ_1) location opposite to the grain moving direction, extending perpendicular to the stress(σ_1). It was also indicated that the capability of specifying the location of crack should decrease in case of tip worn grain under the constant depth of cut, because relatively low stress distribution around the grain was obtained.
公益社団法人精密工学会の論文
1991-08-05