Experimental Mechanics

, Volume 23, Issue 4, pp 431–437 | Cite as

Further studies on dynamic crack branching

  • M. Ramulu
  • A. S. Kobayashi
  • B. S. J. Kang
  • D. B. Barker


The newly derived dynamic-crack-branching criterion with its modifications is verified by the dynamicphotoelastic results of dynamic crack branchings in thinpolycarbonate, single-edged crack-tension specimens. Successful crack branching was observed in four specimens and unsuccessful branching in another. Crack branching consistently occurred when the necessary conditions ofK I =K I b =3.3 MPa\(\sqrt m\) and the sufficiency condition ofr o =r c =0.75 mm were satisfied simultaneously. In the unsuccessful branching test, the necessary condition was not satisfied sinceK I was always less thanK I b .


Mechanical Engineer Fluid Dynamics Dynamic Crack Sufficiency Condition Successful Crack 
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Copyright information

© Society for Experimental Mechanics, Inc. 1983

Authors and Affiliations

  • M. Ramulu
    • 1
  • A. S. Kobayashi
    • 1
  • B. S. J. Kang
    • 1
  • D. B. Barker
    • 2
  1. 1.Department of Mechanical EngineeringUniversity of WashingtonSeattleUSA
  2. 2.Department of Mechanical EngineeringUniversity of MarylandCollege ParkUSA

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