在地震前，产生前兆的源非常复杂，大多数情况下可能并非脆性破裂，而是塑性蠕滑或者有流体的参与。
Before earthquakes, the sources of precursors could be very complicated. They might be produced by plastic creep or can attribute to liquids but not crisp fracture in most cases.
文中将偏磨油管的破裂强度问题看作失稳问题，应用弹塑性有限元方法分析了偏磨油管的破裂强度。
We regarding resistancial intensity of lopsided abrasion vitta as destruction question, applying elastoplastic finite element method to analyzed the lopsided abrasion vitta′s resistancial intensity.
模型考虑容器壳体材料的弹性、 塑性变形，适用于容器外壳在塑性变形范围内发生破裂的问题。
The elastic-plastic deformation of the vessel shell is taken into account in the model to suit for the crack problem of the vessel shell in the plastic deformation range.
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