The effect of stress concentration on the fracture and deformation characteristics of ceramics and metals

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088 ‡aASD TDR 63-380
100 1 ‡aWeiss, Volker, ‡d1930- ‡eauthor.
245 1 4 ‡aThe effect of stress concentration on the fracture and deformation characteristics of ceramics and metals / ‡cV. Weiss, J. Sessler, K. Grewal and R. Chait.
264 1 ‡aWright-Patterson Air Force Base, Ohio : ‡bDirectorate of Materials and Processes, Aeronautical Systems Division, Air Force Systems Command, United States Air Force, ‡c1963.
300 ‡avii, 58 pages : ‡billustrations, tables ; ‡c28 cm.
336 ‡atext ‡btxt ‡2rdacontent
337 ‡aunmediated ‡bn ‡2rdamedia
338 ‡avolume ‡bnc ‡2rdacarrier
490 0 ‡aASD technical documentary report ; ‡v63-380
500 ‡a"(Prepared under Contract No. AF 33(616)-7609 by Syracuse University, Syracuse, New York)."
500 ‡a"Project No. 7350, Task No. 735003."
500 ‡a"April 1963."
504 ‡aIncludes bibliographical references (pages 21-23).
520 3 ‡aThe effects of non-uniform stress distributions on fracture strength were studied on four mate rials that exhibit brittle behavior; Wesgo AL995, Mykroy 750 and 1100 (ceramics) and Plexiglas (acrylic plastic). Analysis of the results of both notch tensile and bend tests on these materials indicate that fracture in ceramic materials can be explained by a maximum fracture stress concept provided that the inherent inhomogeneity of these materials is considered in the analysis. Weibull's statistical theory of fracture appears to be ap plicable to the analysis of inhomogeneity. The be havior of Plexiglas is similar to that previously observed for high strength metals. Studies of plastic flow in metallic flat notch tensile speci mens indicate that the distribution of the princi pal longitudinal strain across the notch section is related to the distribution of the longitudinal elastic stress raised to the power b, where b is primarily a function of the strain hardening ex ponent of the material. Also, Neuber's conclusion that K sub t represents the geometric mean of the true stress and true strain concentration factors in pure shear seems generally applicable to the plane stress tension case.
538 ‡aMode of access: Internet.
583 1 ‡awill digitize ‡c20200828 ‡zQueued for digitization August 28, 2020 ‡5miu ‡2pda
650 0 ‡aMetals ‡xFracture.
650 0 ‡aMetals ‡xFatigue.
650 0 ‡aCeramic materials ‡xFracture.
650 0 ‡aCeramic materials ‡xFatigue.
650 0 ‡aStrains and stresses.
650 0 ‡aFracture mechanics.
710 1 ‡aUnited States. ‡bAir Force. ‡bSystems Command. ‡bAeronautical Systems Division. ‡bDirectorate of Materials and Processesd States. ‡eissuing agency.
710 2 ‡aSyracuse University, ‡esponsor.
730 0 ‡aTechnical Report Archive & Image Library (TRAIL)
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