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万吨航空铝合金张力拉伸机结构强度分析与试验 被引量:15
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作者 蔡奎 丁华锋 +1 位作者 李大峰 刘立斌 《机械设计与制造》 北大核心 2013年第6期112-115,共4页
万吨级航空铝合金张力拉伸机是我国新研制的具有世界先进水平的铝合金板材精整设备。针对该拉伸机的结构形式及特点,对拉伸过程中力的传递进行计算,建立拉伸机关键零部件—固定机头和活动机头有限元分析模型,对拉伸过程中关键零件进行... 万吨级航空铝合金张力拉伸机是我国新研制的具有世界先进水平的铝合金板材精整设备。针对该拉伸机的结构形式及特点,对拉伸过程中力的传递进行计算,建立拉伸机关键零部件—固定机头和活动机头有限元分析模型,对拉伸过程中关键零件进行有限元分析。结果表明,拉伸机关键零部件—固定机头和活动机头的强度和刚度满足要求,最大应力小于100MPa;压套始终处于压缩状态,机架稳定性好,证明采用组合式结构的拉伸机设计合理。通过现场测试验证了有限元分析结果,证明有限元分析模型的正确性。 展开更多
关键词 张力拉伸机 固定机头 活动机头 螺栓预紧 试验测试
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Posterior dislocation of the hip with ipsilateral displaced femoral neck fracture 被引量:6
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作者 Vivek Trikha Tarun Goyal Ram K. Jha 《Chinese Journal of Traumatology》 CAS 2011年第2期104-106,共3页
Traumatic posterior dislocation of hip associated with ipsilateral displaced femoral neck fracture is a rare injury. Moreover, the management of such patients evokes strong views regarding primary replacement or prese... Traumatic posterior dislocation of hip associated with ipsilateral displaced femoral neck fracture is a rare injury. Moreover, the management of such patients evokes strong views regarding primary replacement or preserving the femoral head. We presented a case of young adult with such an injury. He was operated upon with reduction of the dislocation and fixation of femoral neck fracture with the help of cancellous screws. Two years later, the fracture had united and the patient was asymptomatic. We further proposed the mechanism of injury for such a fracture and discussed the management in the changing trauma scenario of the developing world. 展开更多
关键词 TRAUMA Hip dislocation Femoral neck fractures
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Ipsilateral fracture dislocations of the hip and knee joints with contralateral open fracture of the leg: a rare case and its management principles 被引量:5
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作者 Ramesh Kumar Sen Sujit Kumar Tripathy Vibhu Krishnan Tarun Goyal Vanyambadi Jagadeesh 《Chinese Journal of Traumatology》 CAS 2011年第3期183-187,共5页
This paper discussed the injury mechanism and management of a patient who had concomitant ipsilateral hip and knee dislocations and contralateral open leg fracture. A 32-year-old man presented with ipsilateral fractu... This paper discussed the injury mechanism and management of a patient who had concomitant ipsilateral hip and knee dislocations and contralateral open leg fracture. A 32-year-old man presented with ipsilateral fracturedislocations of the left hip (Pipkin's type IV) and knee (Moore II)joints and contralateral open fracture of the leg bones after a car accident. After emergency resuscitative measures, the hip joint was reduced and Pipkin's fracture was fixed using Ganz approach with lag screws; knee joint was reduced closely and tibial plateau fracture was stabilized with lateral buttress plate and a transarticular spanning fixator. The open fracture on the other leg was debrided and fixed with an external fixator. There was no insta-bility in both joints after fixation when he was examined under anesthesia. The fractures united after 3 months and the patient had no residual instability of hip and knee. There was no clinical or radiological evidence of osteonecrosis in the hip joint after 6 months. At one-year follow-up, he had satisfactory functional outcome with almost normal range of motion at both joints. Ipsilateral hip and knee dislocations are rare injuries and more caution is needed for early diagnosis. A timely appropriate intervention can provide good functional outcome to the patient in this situation. 展开更多
关键词 Hip dislocation Knee dislocation FRACTURES bone
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