Accession Number : AD0741687

Title :   Combined Mode Crack Extension in Adhesive Joints,

Corporate Author : ILLINOIS UNIV URBANA DEPT OF THEORETICAL AND APPLIED MECHANICS

Personal Author(s) : Trantina,G. G.

Report Date : NOV 1971

Pagination or Media Count : 45

Abstract : Crack extension in an adhesive system under combined mode loading is investigated. The specimens were obtained by bonding aluminum adherends with a Dow 332 epoxy resin mixed with 10% TEPA hardener and postcured at 180 F. A finite element stress analysis for a slant edge-cracked (SEN) plate furnishes the opening and shear mode stress intensity factors over a wide range of slant angles and crack lengths. By varying the angle between the adhesive layer and the load line in an SEN specimen combined mode crack extension is observed and the combined mode fracture toughness values are then determined. The effect of the location of the crack tip (center of bond or interface) IS ALSO DISCUSSED. (Author, modified-PL)

Descriptors :   (*BONDED JOINTS, CRACK PROPAGATION), STRESSES, LOADS(FORCES), FRACTURE(MECHANICS)

Subject Categories : Couplers, Fasteners, and Joints

Distribution Statement : APPROVED FOR PUBLIC RELEASE