Paper Title:
Microstructural Parameters in the Theory of Critical Distances

The work described below investigates, for the first time, the link between microstructural parameters such as grain size and the length constant L which is known as the critical distance. L is frequently used in the prediction of failure processes such as brittle fracture and fatigue, initiated at stress concentration features such as notches. Values of L were calculated using data from the literature on the effect of short cracks and notches in steels and ceramics. In some cases, simple relationships could be established between L and the grain size, or other microstructural features. Sometimes L was found to be much larger than anything in the microstructure and appeared to be related to the size of the damage zone at failure.

Materials Science Forum (Volumes 567-568)
Edited by
Pavel Šandera
D. Taylor, "Microstructural Parameters in the Theory of Critical Distances", Materials Science Forum, Vols. 567-568, pp. 23-28, 2008
Online since
December 2007
Authors: Jae Hoon Kim, Duck Hoi Kim, Nam Su Rho, Young Shin Lee, Song Heo Koo, Soon Il Moon
Abstract:The objective of this study is to evaluate the mechanical properties of static, quasidynamic and dynamic fracture toughness of glass-filled...
Authors: Min Chul Kim, Jae Bong Lee, Yong Jun Oh, Bong Sang Lee
Abstract:The critical fracture stresses (σ* f(sp)) in various low alloy steels for a reactor pressure vessel(RPV) were evaluated by a small punch...
Authors: Yan Hua Zhao, Hua Zhang, Wei Dong
Abstract:The wedge splitting (WS) test is now a promising method to perform stable fracture mechanics tests on concrete-like quasi brittle materials....
Authors: Fang Juan Qi, Jian Li, Zhi Juan Yang, Min Fang
Mechanical Behavior & Fracture
Abstract:Investigation shows that one of the failure modes of HDPE pipe is the crack slowly grows across the thick direction and leads to failure at...
Authors: Alberto Sapora, Pietro Cornetti, Alberto Carpinteri, Donato Firrao
Chapter 5: Synthesis and Characterization of Materials
Abstract:The coupled Finite Fracture Mechanics (FFM) criterion is applied to investigate brittle fracture in rounded V-notched samples under mode I...