The last two factors induce borehole instability both by affecting stress distribution around wellbore and material properties of rock.
但后两者都是影响井壁应力分布和岩石力学性能而造成井壁不稳定。
Considering the judgment of dynamic instability of truss structures, a stress rate method for dynamic instability analysis of truss structures was proposed.
针对结构动力失稳的判定问题，提出了一种适用于杆系结构动力稳定分析的应力变化率法。
Objective To discuss the significance of stress roentgenogram on diagnosis of chronic instability of lateral ankle and. bring forward the radiology diagnosis criteria.
目的探讨应力位片在慢性外踝关节不稳定诊断中的意义，提出影像学的定量诊断方法。
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