|
摘要：
|
|
根据前期所做的扁挤压整体筒[1]和双层筒[2]光弹性实验(这两个实验模型具有相同的型腔尺寸(42×20mm)和外径(104mm),因此具有可比性),旨在对这两组实验数据作一综合分析,获得双层扁挤压组合筒的装配压力的分布规律和装配面挤压力的分布规律,并利用叠加原理得到组合筒挤压时的应力场。结果分析显示,扁挤压筒组合结构与整体结构相比,有效降低了型腔长轴方向的应力集中,改善了挤压筒的受力,为扁挤压筒的结构设计和强度计算提供了一定的实验依据。
|
|
Based on the previously finished photoelastic experiments of flat extrusion integrated cylinder and double-layer cylinder(The models have the same cavity dimension(42×20mm) and maximal diameter(104mm),so they can be compared with each other).Authors analyze and synthesize these experimental data now,and get distribution regularity of extrusion load on the inner wall and stress distribution along the assembling circumference of the double-layer flat extrusion container.Additionally authors use the superposition principle to obtain stress distribution of the double-layer flat extrusion container during extruding.The results indicate that the double-layer flat extrusion container reduces the stress concentration at the ends of the long axis of the cavity more effectually than the integrated container,thus the strength of extrusion load is improved.It can also be adopted for structure design and strength computing of the flat extrusion cylinder.
|
|
基金项目：
|
|
国家自然科学基金资助项目(50075022)
|
|
作者简介：
|
|
|
|
参考文献：
|
[1]王美芹,许在文,柳兆涛,等.扁挤压筒的挤压力及应力场的光弹性分析[J].实验力学,2004,(3):376 380.
[2]许在文,王美芹,王炯华,等.整体壁板扁挤压组合筒光弹性应力分析[J].合肥工业大学学报(自然科学版),2004,27(8):891 894.
[3]王匀,刘全坤,王雷刚.整体壁板挤压模应力分析和提高强度的措施[J].力学与实践,2002,24(6):27 30.
[4]谢建新,毛倩,李静媛,等.80 MN挤压机用扁挤压筒的初步设计[J].锻压技术,1999,24(3):48 51.
[5]肖大志,何高法,雷亚,等.扁挤压筒受力的有限元分析及实验[J].金属成形工艺,2001,19(5):31 33.
[6]徐盈辉,谢水生,张学军.扁挤压筒装配应力计算与受力分析[J].稀有金属,2000,24(3):182 187.
[7]大连工学院数理力学系光测组.光弹性实验[M].北京:国防工业出版社,1978.
|
|
服务与反馈：
|
|
【文章下载】【加入收藏】
|
|
|
|
