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物体破裂,多为结构变松之结果,物体结构变松多导源於软性流动中两组X型扭面,(在平而上为Luders’line),此两组扭面可视为流面(flow planes),因流体本身内无张应力,故恒有一组发育而成流层。
The rupture of the object is mostly the result of structural looseness. The object structure becomes loose and leads to two sets of X-shaped kinks in the soft flow (Luders’line on the flat side). The kinked surfaces of the two groups can be regarded as the flow surface (flow planes), because there is no tension in the fluid itself, so there is a group of constant development of the stratosphere.