Xiulin Zheng

TL;DR: In this paper, a unified model for predicting the notch strength and the fracture toughness, K IC, is given and checked on the basis of summarizing the recent research, where the crack initiation at notch tip may be assumed to occur due to the fracture of the hypothetical material element located at notch root.

TL;DR: In this paper, a simple formula for fatigue crack propagation (FCP), the derivation of which is based on the modified static fracture model, can give a good fit to the FCP test results of metals where FCP occurs due to the striation mechanism.

TL;DR: Based on the irreversible thermodynamics and orthogonal flow rule, a microdamage evolution equation is first formulated, taking advantage of the specific free energy and plastic potential with internal variables.

TL;DR: In this article, new procedures are developed to determine the probability distribution of fatigue strength and the expressions of P-S-N curves and the dispersion of fatigue life and fatigue strength are discussed.

TL;DR: In this article, the fatigue life of an old bridge on the line from Beijing to Shenyang, which was constructed in 1920s and replaced in 1980s, has been experimentally determined by using specimens with the original rivet central holes and the key-hole CT specimens without the damaged surface layer.