As shown by the study,being acted by alternating stress,bolt strength is deficiency as leads to failure.
针对球磨机运转时中空轴联接螺栓常发生断裂的实际问题,根据线弹性理论,对Φ3×11m磨机的中空轴联接螺栓进行力学分析,研究其应力分布规律,研究表明:联接螺栓在循环的交变应力作用下,强度明显不足,必然会引起断裂。
Based on Miner s fatigue theory and Whler s safe boundary,the authors investigated into the conductor fatigue test method under the compound alternating stress and life prediction method for overhead transmission lines.
以Miner疲劳理论及W hler安全边界曲线为基础 ,探讨了复合交变应力条件下的导线疲劳试验方法与架空输电线路的寿命估算方法。
In this non-impact working condition,the description of pump valve\'s motion characteristic was perfected,and the harmfulness of accelerating pump valve\'s failure by stress concentration under alternating stress was considered.
该条件完善了泵阀运动特性的描述,考虑了应力集中在交变应力作用下对加速泵阀失效所带来的危害性,将无冲击条件应用于泵阀设计,对延长泵阀的使用寿命有一定的指导意义。
Resulted by the action of alternative temperature,the pipeline of thermodynamics system will generate a kind of alternative stress,the metal in the focus region of thermal stress will wear out up to crack.
热力系统管道在交变温度作用下会产生交变应力、热应力集中区域金属易造成疲劳 ,当疲劳到达极限值时产生破坏 ,形成裂纹。
In this paper, the characteristics and the modes of the cracks in chair slide in a BJ2021 jeep were analysed It is shown that the cracks are characterized by typical fatigue, the bad fixation and the alternative stresses are responsible for the fracture of slid
结果表明， 座椅滑道失效模式为典型的疲劳断裂， 其原因系座椅支架固定不牢， 在运行过程中断裂处出现交变应力作用所
However, the study based on alternative stress, including ultrasound and sound, on the impact of disease resistance in crop is reported seldom.
目前国内外主要集中于光、磁、电、声波对农作物的生长发育、产量影响的研究,而基于超声波、声波等交变应力对农作物抗病影响的研究很少见于报道。
Objective To investigate the effects of time varied stress on the proliferation of myoblast in rats and provide the basic experimental data for the remodeling of tissue in functional orthopaedics.
目的探讨不同交变应力作用下,大鼠翼外肌成肌细胞增殖活性的变化,为交变应力下翼外肌组织的改建提供必要的基础实验数据。
Objective To investigate the effects of time varied stress on the shape-alteration of myoblast in rats and to provide a theoretic base to determine the mechanics of myoblast in orthodontic therapy.
目的评价不同交变应力作用下大鼠翼外肌成肌细胞的形态学改建,从而探讨矫形治疗中成肌细胞的改建机制。
The results show that one of the main reasons that multiplayer films are strengthened and having superhardness is the alternating stress field resulted from coherent strain of interface or other causes.
结果认为 ,界面共格应变或其他原因所导致的交变应力场对薄膜造成的强化作用是纳米多层膜产生超硬效应的主要原因之一 。
The strengthening of Cu/Ni multilayers arises from the constraint of the alternating stress field on glide dislocations in multilayers, which includes image forces due to modulus difference across an interface, and the stress of misfit dislocations due to lattice mismath at the interfaces.
Cu／Ni多层膜的强化作用来自于多层膜结构中交变应力场对位错运动的约束,该交变应力场主要包括两部分：在共格界面处由于剪切模量差而导致的镜像力,以及多层膜内由于晶格常数差而形成失配位错网的应力,如果位错在膜层内运动的临界应力值小于交变应力场的约束,位错会被限制在单层膜内运动,多层膜被强化；反之,则位错很容易通过界面到达临近的膜层,多层膜开始出现弱化,交变应力场的变化幅值与多层膜的调制波长相关,理论计算结果表明,Cu／Ni多层膜的临界调制波长为1。
Alternating stress produced by alternating dynamic ice force evidently results in the partial fatigue failure.
交变冰力引起的结构交变应力必将导致结构的局部疲劳损伤。
A Research on Failure Mechanism of Drilling String in Interaction of Stresses and Corrosion;
交变应力和腐蚀交互作用下钻柱失效机理研究
They are fatigue cracks which is mainly caused by alternating stress.
叶片裂纹是疲劳裂纹,主要由交变应力引起。
Study of Alternative Stress-induced Resistance to Rice Sheath Blight (Rhizoctonia Solani)
交变应力诱导水稻纹枯病抗性的实验研究
Under act of the alternating thermal stress, thermal fatigue is one of theprimary invalidity forms of cast iron workpiece.
在热交变应力的作用下，热疲劳是铸铁工件的主要失效形式之一。
Metal fatigue strength test under symmetrical cycled intertransform stress;
对称循环交变应力作用下金属材料的疲劳强度实验研究
Effect of oscillation shear stress on endothelial cells in cell culture system
体外细胞培养装置评估交变应力对内皮细胞的影响
Application of HVAC Variable-freguency Control Technology in Fossil-fual Power Plants
高压交流变频调速技术在火力发电厂的应用
Research on the Performance of Welding Residual Stress under the Effect of Alternate Loadings;
焊接残余应力场在交变载荷作用下的特性研究
Study on the Excavation-deformation Behavior and Lining Stress of Deep Buried Cross Tunnel;
深埋交叉隧道开挖变形行为及衬砌应力研究
Research on Performance of Welding Residual Stress under the Effect of Alternate Loadings;
交变载荷作用下焊接残余应力场的特性研究
The Hybrid Stress Finite Element Method for 3D Elastic-Plastic Large Deformation Analysis
三维弹塑性有限变形问题的杂交应力元法
PERFORMANCE ANALYSIS OF 3D HYBRID STRESS ELEMENTS WITH A BASIC DEFORMATION-BASED APPROACH
三维杂交应力元性能分析的基本变形模式方法
Relationship between changes of osmotic adjustment ability of wheat under drought and cold cross-stress and cross-adaptation
干旱-低温交叉逆境下小麦渗透调节能力的变化与交叉适应的关系
temperature-stress-strain diagram
温度-应力-应变图
The Analysis of Aerated Bias Tyre s Interlaminar Shear Stress and the Study of the Material Parameters Influence on the Tyre;
斜交轮胎充气状态下的层间剪应力分析及材料特性参数对轮胎应力、应变影响的研究
In this paper the stress and deformation in a orthotropic hybrid laminated beam are studied.
本文研究了正交各向异性混杂叠层梁的应力与变形计算。
The Research and Design of Wave Controllable Pressure Alternating System Based on Fuzzy Adaptive PID Control;
基于模糊自适应PID控制的可控波形压力交变系统研究与设计