Abstract
The transient response of the dynamic-tear-test specimen of a brittle material, Homalite-100, was investigated by dynamic photoelasticity and dynamic finite-element method. The dynamic stress-intensity factors obtained from dynamic photoelasticity and dynamic finite-element analyses were in reasonable agreement with each other. The dynamic finite-element analysis also showed that the dynamic-fracture-initiation toughness could be determined from the dynamicstrain response of a strain gage located near the crack tip in conjunction with a simple static analysis. Dynamic-fracture-toughness vs. crack-velocity relation was also obtained.
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Abbreviations
- K ID :
-
plane-strain dynamic (or fast)-fracture toughness
- G ID :
-
plane-strain dynamic-energy-release rate =\(\frac{{K_{ID}^2 (1 - v^2 )}}{E}\) whereA(c) is dynamic correction factor described in Ref. 5
- K Id :
-
plane-strain fracture toughness under dynamic loading, i.e., dynamic-initiation fracture toughness
- K IC :
-
plane-strain fracture toughness under static loading, i.e., standard ASTM designation
- K Im :
-
minimum dynamic resistance of a rapidly propagating crack expressed in terms of dynamic fracture toughness
- a :
-
crack length
- c :
-
crack velocity
- b :
-
DTT-specimen depth
- E, v, f, p, c 1,c 2 andc p :
-
are defined in Table 1
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Mall, S., Kobayashi, A.S. & Urabe, Y. Dynamic photoelastic and dynamic finite-element analyses of dynamic-tear-test specimens. Experimental Mechanics 18, 449–456 (1978). https://doi.org/10.1007/BF02324280
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DOI: https://doi.org/10.1007/BF02324280