00000nam 2200000zi 4500 9.869842 CaOODSP 20221107162947 m o d f cr nn||||||||| 190313t19691969oncad ob f000 0 eng d CaOODSP eng rda CaOODSP eng fre n-cn--- M38-1/201-1969E-PDF M38-1/201 Trudeau, L. P., author. Shear lips, zero isoclinics, and fracture / L.P. Trudeau, Physical Metallurgy Division. Ottawa : Department of Energy, Mines and Resources, Mines Branch, January 1969. ©1969 1 online resource (iv, 11 pages) : illustrations, charts. text txt rdacontent computer c rdamedia online resource cr rdacarrier Research report ; R 201 Cover title. Digitized edition from print [produced by Natural Resources Canada]. Includes bibliographical references (page 11). "Examination of "shear lip" contours formed in the process of fracture under tensile stress shows that they regularly start at 60 degrees to the flat part of the fracture. These well-defined contours might be expected to have a mechanical cause that predicts their form more closely than the common assertion that they are 45-degree shear fractures. It is suggested that the "shear lips" are actually zero isoclinic contours characterized by zero shear. This hypothesis is physically plausible because the oblique part of the fracture could occur with purely normal displacements in the same way as the flat part of the fracture is formed. An equation for the elastic zero-isoclinic contour is presented, and also experimental evidence,in support of the proposal, obtained from tensile tests and tests with birefringent plastic on steel crack-notch toughness specimens"--Abstract, page i. Includes abstract in French. gccst Metals Canada. Department of Energy, Mines and Resources. Canada. Mines Branch. Canada. Physical Metallurgy Division. Research report (Canada. Mines Branch) R 201. (CaOODSP)9.855660 PDF 2.89 MB https://publications.gc.ca/collections/collection_2019/rncan-nrcan/m38-1/M38-1-201-1969-eng.pdf