Accession Number : ADA305039

Title :   Considerations of Crack Growth and Plasticity in Finite Element Analysis.

Corporate Author : GEORGE WASHINGTON UNIV WASHINGTON DC SCHOOL OF ENGINEERING AND APPLIED SCIENC E

Personal Author(s) : Lee, James D. ; Liebowitz, Harold

PDF Url : ADA305039

Report Date : JUL 1978

Pagination or Media Count : 42

Abstract : A finite element analysis was made of crack growth in a center-cracked specimen subjected to monotonically increasing load until the point of fast fracture. Since part of the specimen experienced unloading, the boundary value problem which was formulated was based upon incremental theory of plasticity. Experimental load and crack-size records were utilized. Linear relations between plastic energy and crack growth were observed. Fracture toughness parameters Gc, which were evaluated at the onset of unstable crack propagation, obtained from finite element analysis were in good agreement with those determined experimentally.

Descriptors :   *FRACTURE(MECHANICS), *CRACK PROPAGATION, *PLASTIC PROPERTIES, STRESS STRAIN RELATIONS, MATHEMATICAL MODELS, LOAD DISTRIBUTION, STRESS ANALYSIS, MATRICES(MATHEMATICS), FINITE ELEMENT ANALYSIS, LOADS(FORCES), STIFFNESS, CRACKING(FRACTURING), DISPLACEMENT, MODULUS OF ELASTICITY, TOUGHNESS, CORRELATION, BOUNDARY VALUE PROBLEMS, POISSON RATIO, UNLOADING.

Subject Categories : Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE