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


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a114525.pdf


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