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Author: Dallas Glen Smith Publisher: ISBN: Category : Photoelasticity Languages : en Pages : 29
Book Description
Using an idea proposed by G.R. Irwin, equations were developed for the maximum in-plane local shearing stress Tau sub m and average fringe loop inclination Theta sub m near the crack tip in terms of the Mode 1 and Mode 2 stress intensity factors K1 and K2 and polar coordinates r and Theta measured from the crack tip. A series of photoelastic experiments was performed on specimens exhibiting various edge crack configurations in finite strips under remote tensile loading. Measurements of Tau sub m and Theta sub m were made for progressively smaller fringes and used in the above mentioned equations to solve for K1 and K2 on a digital computer. Plots of apparent K versus r/a were made and extrapolated to the crack tip to yield the true values of K1 and K2. Results compared favorably with numerical results of Wilson. New results for 'angle' cracks were also obtained. (Author).
Author: Dallas Glen Smith Publisher: ISBN: Category : Photoelasticity Languages : en Pages : 29
Book Description
Using an idea proposed by G.R. Irwin, equations were developed for the maximum in-plane local shearing stress Tau sub m and average fringe loop inclination Theta sub m near the crack tip in terms of the Mode 1 and Mode 2 stress intensity factors K1 and K2 and polar coordinates r and Theta measured from the crack tip. A series of photoelastic experiments was performed on specimens exhibiting various edge crack configurations in finite strips under remote tensile loading. Measurements of Tau sub m and Theta sub m were made for progressively smaller fringes and used in the above mentioned equations to solve for K1 and K2 on a digital computer. Plots of apparent K versus r/a were made and extrapolated to the crack tip to yield the true values of K1 and K2. Results compared favorably with numerical results of Wilson. New results for 'angle' cracks were also obtained. (Author).
Author: E.E. Gdoutos Publisher: Springer Science & Business Media ISBN: 9400919565 Category : Science Languages : en Pages : 326
Book Description
It is difficult to do justice to fracture mechanics in a textbook, for the subject encompasses so many disciplines. A general survey of the field would serve no purpose other than give a collection of references. The present book by Professor E. E. Gdoutos is refreshing because it does not fall into the esoteric tradition of outlining equations and results. Basic ideas and underlying principles are clearly explained as to how they are used in application. The presentations are concise and each topic can be understood by advanced undergraduates in material science and continuum mechanics. The book is highly recommended not only as a text in fracture mechanics but also as a reference to those interested in the general aspects of failure analysis. In addition to providing an in-depth review of the analytical methods for evaluating the fundamental quantities used in linear elastic fracture mechanics, various criteria are discussed re:O. ecting their limitations and applications. Par ticular emphases are given to predicting crack initiation, subcritical growth and the onset of rapid fracture from a single criterion. Those models in which it is assumed that the crack extends from tip to tip rely on the specific surface energy concept. The differences in the global and energy states before and after crack extension were associated with the energy required to create a unit area of crack surface. Applications were limited by the requirement of self-similar crack growth.
Author: M. A. Schroedl Publisher: ISBN: Category : Photoelasticity Languages : en Pages : 40
Book Description
A Taylor Series correction to the maximum in plane shear stress was studied as a means of extending the data zone in photoelastic determination of stress intensity factors beyond the singular region of a two degree of freedom analysis. Convergence properties were obtained by comparing with several complete two-dimensional solutions. Experiments were performed on two kinds of three-dimensional problems; plates containing surface flaws in both bending and extension. Results were analyzed by both a two degree of freedom and a Taylor Series Correction Method (TSCM). (Author Modified Abstract).
Author: Dallas Glen Smith
Author: Dallas Glen Smith
Author: Peter N. Toivonen
Author: C. Ruiz
Author: William Thor Hardrath
Author: Tae Hyun Baek
Author: Peizhong Zhang
Author: E.E. Gdoutos
Author: M. A. Schroedl
Author: Mohammad Mahinfalah
Author: Michael Andrew Schroedl