共搜索到2382条信息,每页显示10条信息,共239页。用时:0小时0分0秒341毫秒
boundary structures of 2060-T8 alloy during bending were investigated by backscattered electron imaging, electron backscattered diffraction, and misorientation axes maps. Experimental result shows that typical dislocation boundary structures, which depend on grains’ orientation, are formed in grains during bending. The microstructure of type A is mainly observed in grains near brass, copper......
error was proposed to calculate the centre distance of hob and workpiece spindle of large-scale numerical control (NC) gear hobbing machine, and then a set of experimental system was established... studied after testing a certain type large-scale NC gear hobbing machine, obtaining the curve of relationship between thermal error and machining temperature ultimately. The average value of theory......
An Investigation on Rotating Bending Fatigue Behavior of Nanostructured Low-Temperature Bainitic SteelB.R.Shendy1,B.Avishan3,S.Yazdani11. Faculty of Materials Engineering,Sahand University... of nanostructured,low-temperature bainitic steels,where rotating bending fatigue tests were conducted on samples isothermally transformed at 300,250,and200 °C,after which,fracture surfaces were examined using......
The Influence of Mineral Admixtures on Bending Strength of Mortar on the Premise of Equal Compressive Strength王强,阎培渝Department of Civil Engineering, Tsinghua University摘 要:The influence of mineral admixtures on bending strength of mortar on the premise of equal compressive strength was investigated. Three mineral admixtures (fly ash, ground granulated......
混凝土(NC)作为接缝的2组拼接箱梁模型的试验研究.研究结果表明:拼缝采用MC时,拼接段开裂后呈现多缝开裂破坏模式,破坏荷载比大于采用NC连接的破坏荷载比;MC接缝的裂缝宽度超过0.2 mm时仍缓慢增长且刚度逐步下降;而NC接缝的裂缝宽度超过0.2 mm时急剧增长且变形亦急剧增长,构件很快破坏;MC接缝比NC接缝具有更好的抗裂,变形和传力性能. 关键词:拼接箱梁;碱式硫酸镁水泥混凝土;破坏荷载比... magnesium sulfate cement concrete(MC) when it was used in bridge widening, two specimens of widened box girders with MC and normal Portland cement concrete (NC) as joint materials were studied......
analysis of different configurations of hollow and of PMI foam-filled A-stringers/A-formers under axial compression load and bending moment.In this connection the Finite-Element-Analysis (FEA) program... on the loading conditions,e.g.bending moment and axial compression,as well as the geometry of the A-profile. 关键词:A-stringer; A-former; foam-filled; hollow; axial compression; bending moment; [全文内容正在添加中] ......
......
Stress and Springback Analyses of API X70 Pipeline Steel Under 3-Roller Bending via Finite Element MethodWenbo Zhao1,T.Warren Liao11. Department of Mechanical and Industrial Engineering,Louisiana State University摘 要:3-Roller bending is a widely applied manufacturing process, particularly in structural steel pipe industry.However, due to the difficulty......
Tensile properties and microstructure of AZ31B magnesium alloy sheet processed by repeated unidirectional bending HUANG Guang-sheng(黄光胜)1,2, LI Hong-cheng(李红成)1,2, SONG Bo(宋 波)1,2, ZHANG Lei(张 雷...; Abstract: The mechanical properties of the AZ31B magnesium alloy sheet processed by repeated unidirectional bending (RUB) with a basal pole tilted in the rolling......
Bending and Twisting Springback Prediction in the Punching of the Core for a Lattice Truss Sandwich StructureWenchun JIANG,Bin YANG,Xuewei GUAN,Yun LUOState Key Laboratory of Heavy Oil Processing... the homogenous sheet. Not only bending springback, but also a twisting springback along the truss is generated because of the non-uniform distribution of the bending stress along the truss length. The plate......