Forcing a cool material to flow can generate excessive shear energy and localized degradation in the screw's flow channel.
强迫一种冷的材料流动会产生极大地剪切能，并在螺杆的流道中产生降解。
2
The constant shear strain point accounting for the degradation of stiffness was discussed.
对考虑刚度劣化时的常剪切应变点进行了讨论。
3
One solution is to maintain sufficient shear to wipe the metal surfaces constantly, since most polymer degradation occurs when polymer contacts metal for too long.