查询词典 tension fracture

Methods Analyze the biomechanical stability of the fixed humeral fracture with corner lock plate and LC-DCP plate by three methods:tension test,bending test and torsion test.

采用8具新鲜的成人肱骨标本进行实验应力分析，比较成角锁定钢板和传统LC-DCP钢板固定肱骨中段骨折在不同载荷下的强度、刚度和稳定性的差异性以及应力遮挡的结果。

Methods Analyze the biomechanical stability of the fixed humeral fracture with corner lock plate and LC-DCP plate by three methods:tension test,bending test and torsion test.

结果 成角锁定钢板的一系列生物力学性能优于传统LC-DCP钢板，在强度、刚度、应力遮挡率上具有较大的优势，两者均差异有显著性（P.05）。

The main research tasks and results are as follows:(1) Through comparing the stress intensity factor of compact tension specimen calculated by finite element software with the theoretical value, the feasibility of calculating fracture parameters of crack tip in ABAQUS software was verified.(2) The relationship between the elastic modulus of the material and research scale was studied based on deriving the cohesive stress theory and other relevant theories. And the elastic modulus of the material on meso-scale was determined.(3) Global model and sub-model of the finite element were built in th...e macro-scale, and stress-strain field nearby the crack tip was analyzed, and the results show that the detailed stress-strain in the crack tip could be obtained by using the sub-model technique.(4) In meso-scale, the crack growth model was also established by assuming the crack propagating along the grain boundary, and the detailed stress-strain field in the crack tip was obtained.(5) The effect of crack length on Von Mises stress, and maximum principal stress and strain was analyzed in meso-scale when equivalent KI equals 30MPa.m1/2. And the results show that except for crack tip area, the stress-strain distribution in whole specimen is not affected.

主要完成研究内容和取得成果如下：(1)利用有限元软件计算出紧凑拉伸试样的裂纹尖端应力强度因子KI值，其结果与理论值一致，从而验证了利用ABAQUS计算裂纹尖端相关断裂参量的可行性；(2)在研究内聚应力等相关理论的基础上，推导出了研究尺度与材料弹性模量的近似关系，并确定了介观尺度上的弹性模量；(3)在宏观尺度上建立了全局有限元计算模型和子模型，得到了裂纹尖端应力应变场分布，结果表明利用子模型技术获得比较准确的裂纹尖端应力应变场分布是可行的；(4)在介观尺度上利用平均晶粒尺度的方式建立了裂纹沿晶扩展模型，得到了裂纹尖端断裂过程区的微观应力应变场；(5)当应力强度因子为30MPa.m1/2时，分析了介观尺度上在裂纹沿晶扩展过程中裂纹长度对Mises应力、最大主应力和应变的影响，结果表明，裂纹扩展长度对试样整体应力应变分布影响不大，而对裂纹尖端区域有较大影响；(6)介。。。

On the other hand, the slip-oil steady pin bolt and slip-oil system separated tank valve were endured by action of tension or repeated stress, and then the fatigue and fracture failure will be occurred.

另滑油泵稳梢螺栓及柴油系统用柴油隔舱阀，因零组件所处环境，均受长期拉伸或反覆应力之影响，造成疲劳破断或裂缝。

The VCL method and the displacement method are used to calculate the Stress Intensity Factors of semi-elliptical surface crack at the root of pipe screws, on the basis of which a simplified calculating model for screws contact is put forward so as to analyse the fracture intensity for oil drill pipe screw coupling. For the semi-elliptical surface crack with different shape and deep ratio at the root of female and male screws and the corner of male flange, the SIF has been studied systemically under inter-pressure, tension, bend and torsion loads and the approximate formulas encluding the structure parameters of oil drill pipe screw coupling, deep ratio and the shape parameters of surface crack are developed.

对工程实际中的多种石油钻杆接头螺纹连接件，就公螺纹齿根、母螺纹齿根、公螺纹台阶转角处存在的不同形状、不同厚度比的半椭圆表面裂纹，在拉伸、内压、弯曲、扭转多种载荷作用下的应力强度因子作了系统研究，在大量有限元计算基础上，建立了包含接头结构参数、裂纹形状、厚度比在内的近似计算公式。

Both olecranon steel plate and tension band are the effective treatments of olecranon fracture and should be used according to specific case.

尺骨鹰嘴钢板和张力带都是治疗尺骨鹰嘴骨折的有效方法，可根据具体情况选择使用。中国论文联盟http：//www.lwlm.com

Both olecranon steel plate and tension band are the effective treatments of olecranon fracture and should be used according to specific case.

尺骨鹰嘴钢板和张力带都是治疗尺骨鹰嘴骨折的有效方法，可根据具体情况选择使用。转载于中国论文联盟 http：//www.lwlm.com

Both olecranon steel plate and tension band are the effective treatments of olecranon fracture and should be used according to specific case.

尺骨鹰嘴钢板和张力带都是治疗尺骨鹰嘴骨折的有效方法，可根据具体情况选择使用。中国诺宇综合网http：//www.siaaa.com

The stress redistributions induced by the fracture of some fibers and matrix elements for unidirectionally fiber-reinforced composites subjected to axial tension at cryogenic temperature were studied.

研究了在低温情形下受纵向拉伸荷载作用的单向纤维增强复合材料由部分纤维及基体断裂所导致的应力重新分布。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。