返回Google圖書搜尋

Method for Predicting J-R Curves from Charpy Impact Energy

H. TadaPC. GioielliJD. LandesL. LoushinPC. Paris

出版	ASTM International, 2000
URL	http://books.google.com.hk/books?id=i4l9zgEACAAJ&hl=&source=gbs_api

註釋In this paper a mechanistic rationale for the fracture process is applied to the CVN impact test so that the J-R curve fracture toughness could be estimated for materials that have only a CVN energy value as the fracture toughness characterization. The method assumes that the fit to the J-R curve can be given a standard form by assuming that the product of J and the tearing modulus, T, is a constant. Given this standard fitting form, the CVN energy is used to estimate a point on the J-R curve. Using this single point and the constant J x T product, the J-R curve is estimated with the two-parameter power law fit specified in ASTM standards. The procedure is applied to metals that undergo purely ductile fracture, that is, those that have CVN energy that would be characterized as "upper shelf" or 100% shear.