Representation of the high-temperature crack tip fields using reference stress concepts

Autor:	M. S. Habibullah, A.R.S. Ponter
Rok vydání:	2006
Předmět:	Engineering drawing Engineering Field (physics) business.industry Mechanical Engineering Crack tip opening displacement Mechanics Physics::Geophysics Crack closure Creep Reference stress Mechanics of Materials Thermal Exponent General Materials Science business Representation (mathematics)
Zdroj:	Fatigue Fracture of Engineering Materials and Structures. 29:389-399
ISSN:	1460-2695 8756-758X
DOI:	10.1111/j.1460-2695.2006.00999.x
Popis:	In a previous paper, it was shown that an estimation approach to crack tip properties under cyclic creep loading conditions was described, using a methodology based on the linear matching method (LMM). The calculations revealed the possibility of obtaining the crack tip parameters, C* (n), for cracked structures subjected to both mechanical loads and temperatures, using the HRR field criterion as the crack tip condition. In this paper, those calculated values of C* (n) are re-interpreted and presented in terms of the reference stresses, insensitive to the constitutive models and creep exponent. These reference stress values are compared with those currently used for life assessment of high-temperature plant, showing that current practice is significantly conservative for thermal loading.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::972c215ccc7c7688ad8cdc9c0a51d7f7 https://doi.org/10.1111/j.1460-2695.2006.00999.x Zobrazit plný text záznamu Plný text ve formátu PDF