Experimental Mechanics

, Volume 17, Issue 4, pp 128–132 | Cite as

The dependence of crack velocity on the critical stress in fracture

The constant crack velocity was found to depend on the critical stress in fracture both for static and dynamic loading
  • F. Katsamanis
  • D. Raftopoulos
  • P. S. Theocaris


The constant velocity of crack propagation in PMMA is investigated in terms of the fracture stress for both continuously increasing loading (strain rate ė=0.59×10−4 s−1) and dynamic loading (strain rate ė=0.35 s−1). It was found that the constant crack velocity increases with increasing fracture stress and that it depends on the loading conditions (continuously increasing or dynamic loading). In particular, it was found that the increase of the constant velocity for the static loading case is higher than for the dynamic one. However, in both cases, the constant velocity reaches a limiting value for stresses higher than a certain level.


Mechanical Engineer Fluid Dynamics PMMA Loading Condition Fracture Stress 
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Copyright information

© Society for Experimental Mechanics, Inc. 1977

Authors and Affiliations

  • F. Katsamanis
    • 1
  • D. Raftopoulos
    • 2
  • P. S. Theocaris
    • 1
  1. 1.National Technical UniversityAthensGreece
  2. 2.University of ToledoToledo

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