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- It is based on a database of past PDC bits.In the databased,it includes bit type,average shear stress of well which bit was used in,cost per unit length. 该方法以一个建成的PDC钻头使用资料库为基础 ,该数据库包括钻头型号、所钻井段地层的平均剪切强度、单位进尺钻井成本等指标。
- Finding the relationship of the flux, reflux, average shear rate, and average shear stress with some parameters, such as rotating speed, pressure difference, stagger and clearance. 讨论了各个参数(螺杆转速、压差、错列角、螺杆和机筒间隙)对流量、回流量、平均剪切速率、平均剪切应力的影响。
- average shear stress 平均剪应力
- Critical resolved shear stress (O’crss). 临界分剪切应力。
- The statistical results show that the average, the range of change, and the changing rate were augmented with ECP, i.e. the phasic characteristics of shear stress were increased. 统计结果表明:体外反搏使剪切应力的平均值、变化范围及变化速度都发生了变化,即增加了血流和剪切应力的脉动性。
- The statistic results show that average,range of change and changing rate were augmented with ECP,i.e.the phasic characteristics of shear stress were increased. 统计结果表明:不同压力作用下体外反搏使剪切应力脉动性的改变是不同的。
- The interfacial shear stress is a constant proportion of the bottom shear. 交界面的剪力与底部剪力之比是常数。
- The process does not affect the shear stresses. 这样的处理并不影响剪应力。
- The statistic results show the average,range of change and changing rate were changed with acute myocardial ischemia and ECP,i.e.the phasic characteristics of shear stress were changed. 结果表明:急性心肌缺血和体外反搏可以使剪切应力的平均值、变化范围和变化速率发生变化,即改变了剪切应力的脉动性。
- average shearing stress 平均剪应力
- The cross_sectional average shear rate or the shear rate at the pipe wall in turbulent flow was unreasonably used to evaluate shear history in pipe flow. 以往用截面平均剪切率或湍流时的管壁剪切率衡量流体管流的剪切历史,有不当之处。
- According to the twin shear stress theory, this paper improves on Duncan Model. 根据双剪应力理论对邓肯模型进行了修正。
- Tensile stress and shear stress are transferred by PBL shear connectors. 计算得到钠-混凝土接头的最不利荷载组合内力。
- A fluid is a substance that deforms continuously under an applied shear stress. 液体在剪应力作用下不断变形??
- The main shear stress and its hydraulic system, calculation and research. 主要对其剪切力和液压系统进行计算和研究。
- Thus fluid shear stress has been considered one of the atherogenic factors. 在动物研究中还发现切应力与内皮细胞增生程度有关。
- With gob span increasing, equivalent shear stress in basic roof increases. 随着采空区跨度的不断增加,基本顶等效剪力不断增大。
- According to the relationship between energy dissipation rate and shear rate,average shear rate to evaluate the shear action for annular pipe flow is obtained by using energy dissipation rate. 根据能量耗散率与剪切率的关系,采用体积平均能量耗散率计算环空管流的平均剪切率,以此来评价环空管流的剪切作用。
- The results show that strength of NEPE solid propellant under multi-axis stress state is related to strain;octahedral shear stress nonlinearly increases with the average main stress. 研究表明,多轴应力状态下NEPE固体推进剂强度与应力相关,八面体剪应力随平均主应力的增加呈非线性增加;
- Draw the element for maximum shear stress and mark values of all stresses. 画出最大剪应力的单元体并标出全部应力值。