Determination of the dynamic stress intensity factors, KId and KIId, for a mixed-mide propagating crack

The dynamic propagation problem of a mixed-mode crack was studied by means of the experimental method of caustics. The initial curve and caustic equations were derived under the mixed-mode dynamic condition. A multi-point measurement method for determining the dynamic stress intensity factors, KId and KIId, and the position of the crack tip was developed. Several other methods were adopted to check this method, and showed that it has a good precision. Finally, the dynamic propagating process of a mixed-mode crack in a three-point bending beam specimen was investigated with our method.EI中国科学引文数据库(CSCD)03244-252