The caustics method in combination with high speed photography was employed to study velocity- and acceleration-effects on the dynamic stress intensity factor of fast cracks in glassy polymers. Instantaneous crack velocity as well as its acceleration were expressed as a function of the crack length by using polynominals of the sufficiently higher order. It is shown that the dynamic stress intensity factor depends not only on the crack velocity but also on crack acceleration, and that the accelerating crack has smaller value of the stress intensity factor than the decelerating crack with the same velocity.
|Pages||29. 1-29. 4|
|Publication status||Published - Dec 1 1985|
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