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The structural changes around a crack tip in a high density polyethylene were investigated by means of scanning synchrotron microfocus small-angle X-ray scattering technique.The scattering data confirm the process of craze structure development near a crack tip based on the evolution of voids.In addition,it was found that the main stress in the plastic zone near a crack tip exhibited a gradient distribution with respect to its strength and direction.The whole damaged area showed a strain distribution indicating a flow behavior toward the crack tip.
The structural changes around a crack tip in a high density polyethylene were investigated by means of scanning synchrotron microfocus small-angle X-ray scattering technique. The scattering data confirm the process of craze structure development near a crack tip based on the evolution of voids. In addition, it was found that the main stress in the plastic zone near a crack tip showed a gradient distribution with respect to its strength and direction. The whole damaged area showed a strain distribution indicated a flow behavior toward the crack tip.