球圧子押込みによるセラミック被膜表面のリングクラックの発生

概要

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An elastic-plastic finite element analysis is presented for the axisymmetric problem of frictionless indentation of an elastic sphere into a half-space with a ceramic coating. The analysis is performed for a variety of combinations of material properties, i. e. elastic modulus, strain-hardening exponent and yield stress, for both the coating and the substrate. Results for stresses on the surface and residual stresses after unloading are presented. The effect of elastic moduli, strain-hardening exponents and yield stresses of the coating and substrate on the stresses is examined in detail. Finally, the ring crack initiation on the ceramic coating surface is discussed, emphasizing especially the critical load for the ring crack initiation.
一般社団法人日本機械学会の論文
1998-01-25