Results 1 to 10 of about 262,794 (131)

高强钢高强度螺栓摩擦型连接预紧力松弛试验研究

Jianzhu Gangjiegou Jinzhan
预紧力大小是影响高强度螺栓摩擦型连接承载性能的关键因素之一，而高强度螺栓的预紧力会随时间增加逐渐衰减。为研究钢材强度等级、螺栓等级、孔型与表面处理方式对高强钢高强度螺栓摩擦型连接预紧力松弛的影响以及探究高强度螺栓长时间下的松弛率，文中进行了55组单栓预紧力松弛试验，分别监测了高强度螺栓紧固后24 h内或100 h内的预紧力松弛演化过程。试验结果表明：接触面采用涂层处理会增大高强钢高强度螺栓摩擦型连接的预紧力松弛率，当涂层过厚时，螺栓紧固后24 h内松弛率最大可达10%以上 ...
高飞, 卞卡, 陈俊波
doaj  

特高压支柱绝缘子连接螺栓组布设分析

Dianci bileiqi, 2007
对于多元件组合的棒形支柱绝缘子,在进行元件逐一强度试验时,能达到设计要求;而组合为整体后再进行强度试验时,在中间元件结合部位则会出现弯曲溃坏。通过对连接螺栓组建立受力模型并进行力学分析,以额定机械扭转负荷为8 kN.m,额定机械弯曲负荷为135kN.m的绝缘子做实例分析,确定了其附件安装孔中心圆直径为400mm,安装孔数为8个;连接螺栓直径为24mm,连接螺栓性能等级为8.8级,保证了绝缘子的设计要求。结果表明,逐一进行连接螺栓组的计算是必要的,同时还须充分考虑产品零件准备、试制、试验和装配等环节的匹配。
陈子岩
doaj  

[Transcutaneous osseointegration for amputees: foundational principles and current concepts]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Jason S H, S Robert R, Taylor J R, Zhu Y.   +3 more
europepmc   +1 more source

[Application of Ilizarov soft-tissue distraction technique in chronic limb wounds following popliteal artery injury]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Wang H, Zhu G, Liu H, Zhu Y.
europepmc   +1 more source

[Research progress of tibial plateau fracture associated with proximal fibular fracture]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Yang J, Zheng Z.
europepmc   +1 more source

[Biomechanical analysis of a novel bridging plate for treating Rockwood III acromioclavicular joint dislocation]. [PDF]

Nan Fang Yi Ke Da Xue Xue Bao
Chen Y, Zhang G, Li S, Luo N, Zhang Y.
europepmc   +1 more source

[Current status and future directions of stability reconstruction following spinal tumor resection]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Zhou J, Dong J.
europepmc   +1 more source

[Research progress in treatment of Garden type <b>Ⅳ</b> femoral neck fractures in young adults]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Chen T, Qi B, Xu Z, Xu Y.
europepmc   +1 more source

基于组件法的栓焊节点高温力学模型

Jianzhu Gangjiegou Jinzhan
钢框架梁柱连接节点的高温力学性能是影响火灾下钢框架结构抗连续倒塌性能的关键因素之一。基于组件法，将栓焊节点分解为翼缘拉压组件、连接板螺栓孔承压组件、螺栓受剪组件、梁腹板螺栓孔承压组件和螺栓滑移组件等基本组件，并分别对各组件的等效弹簧力学模型开展理论推导，最终建立了栓焊节点高温组件模型。基于已开展的栓焊节点抗火试验，构建了节点整体受力分析杆系模型，并通过对比有限元结果和试验结果，验证了组件模型的有效性和准确性。研究结果表明 ...
李永梅, 丁润民, 刘美景, 范圣刚   +3 more
doaj  

[Recent advances in application of venous superdrainage in perforator flaps]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
He A, Ba L, Wei Z.
europepmc   +1 more source