If density window ofdrill fluid is designed by elasticity/chemistry models that think borehole wallwhere once shear damage occurs collapse immediately, the density windowwill comparatively narrow and may be not suitable to drilling.
如果用弹性力学-化学耦合模型来设计钻井液密度窗口,这种模型认为井壁一旦出现剪切破坏,就出现井垮,这样设计出的密度窗口较窄,偏向于保守,有时候给施工带来很大困难。
参考来源 - 力—化耦合作用下井眼破坏过程模拟·2,447,543篇论文数据，部分数据来源于NoteExpress
The paper studies the punch-shear damage mechanism of reinforced concrete slabs.
本文研究了钢筋混凝土板的冲切破坏机理。
The FRP rib is prevented from transverse extrusion by the steel sleeve, which avoids the extrusion damage and shear damage of the FRP rib.
通过钢管套保护FRP筋不受横向作用的挤压，避免了FRP筋发生挤压破坏和剪切破坏。
The damage processes revealed that heterogeneity is the source of nonlinear deformation, and high shear stress is the reason of shear damage.
整个损伤过程揭示了非均匀性的存在是非线性变形的根本，而高的剪应力是产生剪切损伤的根源。
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