采用金相方法，分析晶粒尺寸和变形程度对塑性变形不均匀性的影响规律，并从晶粒的各向异性角度研究其产生的机理。
Using the metallography, the effect of grain size and strain on deformation ununiformity are investigated, and the mechanism is analyzed from the viewpoint of the anisotropy of grain.
当这种不均匀变形程度足以使土体连续性破坏时，则地裂缝便在沉降区应力集中的部位发生。
When the deformation caused by the inhomogeneous subsidence accumulates to the critical state of the soil, ground fissures will occur in the stress concentration positions.
为评价管材拉拔中的不均匀变形，提出用管材拉拔前后截面形状变化指数Q描述截面变形的不均匀性。
It is put forward in this article that the cross section deformation index Q can be used to evaluate the inhomogeneity of deformation in tube drawing.
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