Accession Number : ADA114525

Title :   Dynamic Crack Branching - A Photoelastic Evaluation,

Corporate Author : WASHINGTON UNIV SEATTLE DEPT OF MECHANICAL ENGINEERING

Personal Author(s) : Ramulu,M ; Kobayashi,A S ; Kang,B S -J

PDF Url : ADA114525

Report Date : May 1982

Pagination or Media Count : 34

Abstract : A necessary and sufficient condition for crack branching based on a crack branching stress intensity factor, K sub Ib, accompanied by a minimum characteristic distance of r sub c is proposed. This crack branching criterion is evaluated by dynamic photoelastic experiments involving crack branching of six single-edged notch specimens and six wedge-loaded rectangular double cantilever beam specimens. Consistent crack branching at K sub Ib = 2.04 Mpa(sq. rt. m) and r sub c equal 1.3 mm verified this crack branching criterion. The crack branching angle predicted by this crack branching criterion agreed well with those measured in the crack branching experiments. (Author)

Descriptors :   *Crack propagation, *Dynamics, *Photoelasticity, *Test and evaluation, Consistency, Stress concentration, Intensity, Cantilever beams, Standards, Theory, Literature surveys

Subject Categories : Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE