Download e-book for iPad: Mixed-Mode Crack Behavior (ASTM Special Technical by Keith John Miller and David L. McDowell, editors

By Keith John Miller and David L. McDowell, editors

ISBN-10: 0803126026

ISBN-13: 9780803126022

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Extra resources for Mixed-Mode Crack Behavior (ASTM Special Technical Publication, 1359)

Example text

In the following sections, we will validate our proposal for pure Mode I, Mode II, and Mode III cases, separately, after which the mixed Mode I/[I case will be presented. A Mode I Crack The stress fields near a crack tip under Mode I loading conditions can be obtained from Eq I by setting K~ and K m to zero. Using the procedure for the MHSC, CHAO AND ZHU ON DESCRIBING MODES I, II, AND III 47 . Crack FIG. " Note that angle 0"* (or 0") corresponds to a shear (or tensile) failure. 0%0 -3KI 0 . 385.

And Schwalbe, K. -H. "Geometry and Size Effects on J-R and 8-R Curves Under Plane Stress Conditions," Fracture Mechanics: Fifteenth Symposium, ASTM STP 833, R. J. , American Society for Testing and Materials, Philadelphia, 1984, pp. 577-605. [11] Schwalbe, K. -H. " Fracture Mechanics: 26th Volume, ASTM STP 1256, W. G. Reuter, J. H. Underwood, and J. C. , American Society for Testing and Materials, Philadelphia, 1995, pp. 763-778. [12] Schwalbe, K. : Einftihrung des Engineering Treatment Model (ETM) und dessen Anwendung auf experimentelle Ergebnisse und einen Satz Finite Element Rechnungen, GKSS-Research Center, Geesthacht, Germany, GKSS 93/E/72, 1993.

Within the framework of an engineering approach the measurement of the fracture parameter should not be too difficult either. On the basis of our experiments and literature data it will be shown that the crack tip displacement vector ~v measured at fixed location near the fatigue crack tip fulfills the requirements previously mentioned. Moreover, it is demonstrated that ~ is more appropriate to characterize mixed-mode ductile fracture than the usually used J-integral. In the second part of the paper a simple method for estimating the 8v driving force under mixed Mode I/II loading conditions is presented.

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Mixed-Mode Crack Behavior (ASTM Special Technical Publication, 1359) by Keith John Miller and David L. McDowell, editors


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