A comparison of crack-flank displacement fitting for estimating K with a path independent integral

Autor:	D. B. Cooper, G. B. Sinclair, G. Meda
Rok vydání:	1993
Předmět:	Sequence Numerical analysis Mathematical analysis Computational Mechanics Geometry Displacement (vector) Finite element method Mechanics of Materials Modeling and Simulation Path (graph theory) Path integral formulation Point (geometry) Stress intensity factor Mathematics
Zdroj:	International Journal of Fracture. 70:237-251
ISSN:	1573-2673 0376-9429
DOI:	10.1007/bf00012937
Popis:	Predicting crack growth under cyclic loading in applications usually requires the efficient extraction of stress intensity factors from finite element analyses of mixed mode situations. Two approaches to this end are examined: one, a competitive fitting procedure using crack-flank displacement data, the other, a path independent integral which can readily distinguish between modes. A protocol is established for comparing the two on a set of about forty test problems which have exact solutions. Analysis is via quarter point elements on a common sequence of three successively refined meshes for each problem. Results show that the path independent integral is more consistently accurate and reliably convergent, yet comparable in implementation effort.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::0657e23a425b833eaa7a8aad0bf09232 https://doi.org/10.1007/bf00012937 Zobrazit plný text záznamu Full text from SpringerLink