Measurement of Residual Stres in Injection‐Molded Ceramics

Abstract

This paper discribes the adaptation of the layer removal method for the measurement of residual stresses in the plane of a plate for a ceramic injection molding suspension. The latter contained 56 vol% alumina in a polypropylenebased organic vehicle. A strain gauge method was used to measure curvatures. The experimental precautions are discussed and the errors evaluated. The method is applied to conventional moldings made at high and low pressures, to annealed moldings, and to moldings made with a heated sprue.