TY - JOUR

T1 - Applying modified Weibull failure theory to bimaterial specimen under thermal loading

AU - Khandaker, M. P.H.

AU - Ekwaro-Osire, Stephen

AU - Gautam, K.

PY - 2008/3

Y1 - 2008/3

N2 - Failure of a thermally loaded bimaterial specimen was investigated in this research. A high-stress gradient due to thermal loading occurs around the free edge of the interface of the bimaterial specimen. This high-stress gradient plays an important role in the failure of the specimen. The Weibull failure theory has been shown to be unable to account for high-stress gradients in externally loaded bimaterial specimens. The objective of this work is to develop a weight function method to calculate the effective stress intensity factors in the vicinity of a high-stress gradient in a thermally loaded bimaterial specimen, and to develop a modified Weibull failure theory to handle the high-stress gradient. It was found that the modified Weibull failure theory generated monotonous trends for the probability of failure with respect to increasing Weibull moduli, as demonstrated in the literature.

AB - Failure of a thermally loaded bimaterial specimen was investigated in this research. A high-stress gradient due to thermal loading occurs around the free edge of the interface of the bimaterial specimen. This high-stress gradient plays an important role in the failure of the specimen. The Weibull failure theory has been shown to be unable to account for high-stress gradients in externally loaded bimaterial specimens. The objective of this work is to develop a weight function method to calculate the effective stress intensity factors in the vicinity of a high-stress gradient in a thermally loaded bimaterial specimen, and to develop a modified Weibull failure theory to handle the high-stress gradient. It was found that the modified Weibull failure theory generated monotonous trends for the probability of failure with respect to increasing Weibull moduli, as demonstrated in the literature.

KW - Bimaterial

KW - High-stress gradient

KW - Thermal loading

KW - Weibull failure theory

UR - http://www.scopus.com/inward/record.url?scp=44349104752&partnerID=8YFLogxK

U2 - 10.1111/j.1460-2695.2008.01225.x

DO - 10.1111/j.1460-2695.2008.01225.x

M3 - Article

AN - SCOPUS:44349104752

VL - 31

SP - 281

EP - 294

JO - Fatigue & Fracture of Engineering Materials & Structures

JF - Fatigue & Fracture of Engineering Materials & Structures

SN - 8756-758X

IS - 3-4

ER -