ISSN:
1573-2673
Keywords:
dynamic crack propagation
;
stress intensity factor
;
crack velocity
;
a cceleration
;
polymers
;
PMMA
;
expoxy
;
caustic method.
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Abstract Dynamic crack propagations in PMMA and epoxy specimens were studied using the method of caustics in combination with a Cranz-Schardin type high-speed camera. Single-edge-cracked tensile specimens were fractured under pin-loading conditions so that cracks could experience acceleration, deceleration and re-acceleration stages in one fracture process. The dynamic stress intensity factor K ID, crack velocity a and acceleration a were evaluated in the course of crack propagation to examine the effects of a and a on K ID. Results showed that a and a were important factors in changing the values of K ID, and for constant a the decelerating crack had a larger value of K ID than the accelerating or re-accelerating crack. Also, it was found that K ID could be expressed as two parametric functions of and a for PMMA and epoxy specimens.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1007387417517
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