Study on crack of sheet metal in the multi-point forming;
薄板多点成形中的拉裂现象研究
Contrast study of crack on sheet metal under flexible and rigid blank holders in multi-point forming;
柔性和刚性压边方式防止薄板多点成形拉裂的对比分析
Prediction of wrinkling and crack during multi-point drawing forming process for rectangle cup with conical walls;
斜壁盒形件多点拉延成形过程中起皱与拉裂预测
Finite Element Analysis of Fractures in the Process of Digital Multi-point Forming for Retiary Sheet Metal;
带孔网板数字化多点成形过程中拉裂缺陷的有限元分析
The fracture of sheets is caused by the instability of loading.
将Hill集中性失稳理论和Swift分散性失稳理论应用到各向同性板料的失稳判定,将Marciniak和Kuczynski的凹槽损伤失稳理论应用到正交各向异性板料的失稳判定,对冲压成型中板料在不同时刻的稳定性进行数值化描述,并运用计算机仿真技术进行直观的表现来预测拉裂;将开发的仿真系统用于汽车翼子板冲压工艺分析,准确地预测了可能出现拉裂的部位。
Wrinkling and fracture are the major defects in sheet metal forming,and the blank-holder force(BHF) is an important technologic parameter controlling the forming of sheet metal.
在板材成形中,起皱和拉裂是主要缺陷,而压边力是控制板材成形的重要工艺参数。
The paper introduces the debugging process of die and analyzes the reason and preventive measures of dangerous surface cracking and wrinkling in sheet metal forming.
对地板左 \右侧第二横梁外部零件进行拉深成形工艺分析 ,设计了拉深模具结构 ,介绍了模具的调试过程 ,分析薄板料的拉深成形危险断面变薄拉裂及起皱产生的原因和采取的预防措施。
For the wrinkling and cracking problems of automobile covering panel subjected to stamping process,the stamping simulation of the automobile covering panel were carried out based on Dynaform5.
针对汽车覆盖件冲压成形后会出现起皱、拉裂等各种缺陷问题,以汽车覆盖件中最常用的内衬板为研究对象对其进行冲压仿真。
Cause and precaution of 5052 alloy s small slab drawing breakage;
5052铝合金扁锭铸造拉裂原因及预防措施
With regard to produce drawing breakage defect YQ450NQR1 second characters steel,By the fact that the surface defect does appearance,observation,metallographic examination and relevance handicraft inquire into analysis,Find out the drawing breakage defect producing cause and bring forward the measure governing method and taking precautions against.
对于产生拉裂缺陷的YQ450NQR1高强度耐大气腐蚀乙字钢,通过表面缺陷行貌观察、金相检验和相关工艺调查分析,找出拉裂缺陷产生原因并提出治理方法和预防措施。
Simulating tension crack of rock masses by block element method;
岩体结构拉裂的块体单元法模拟
Wrinkle and tension crack may occur in the stamping process of bucket, a curved surface part.
针对曲面冲压件畚斗冲压成形过程中易起皱和拉裂的问题,采用弹塑性有限元法,利用Dynaform模拟分析,对畚斗成形过程及影响成形质量的5个主要工艺参数进行模拟和正交试验优化,获得了最佳工艺参数组合,最后利用试验对数值模拟结果验证。
Effects of interfacial IMC on tensile fracture behavior of Sn-3.0Ag-0.5Cu solder joints on copper substrates;
界面金属间化合物对铜基Sn-3.0Ag-0.5Cu焊点拉伸断裂性能的影响
Thermographic detection method of tensile fracture process for cracked metal specimens;
含裂纹金属拉伸断裂过程的热像检测方法
Characteristics analysis of acoustic emission signals from steel specimens under tensile fracture and fatigue crack condition
钢制试件拉伸断裂及疲劳开裂声发射特征分析
The central section was severely shattered.
中间部分严重拉裂。
intracratonic rift-style basin
克拉通内裂谷型盆地
Rifted (extensional, passive) continental margins
断裂（拉张、被动）型大陆边
Glass always fails in tension.
玻璃总是在拉伸中断裂。
Failure Analysis of 30Cr2Ni2Mo Rod
30Cr2Ni2Mo拉杆断裂失效分析
Transverse crack analysis of SWRH 82B wire rod drawing
SWRH82B盘条拉拔横裂纹分析
Dynamic Split Tension Strength of Marble and the Properties of Crack Initiation and Crack Propagation under Dynamic Split Tests;
大理岩动态劈裂拉伸强度和裂纹起裂扩展特性
The country is disunifying; Yugoslavia broke apart after 1989.
这个国家正在分裂；1989年以后南斯拉夫分裂了。
Model YG026 T Electronic Table Fabric Strength Tester is used for testing the breaking strength and breaking elongation.
用于织物的抗拉伸断裂强力及断裂伸长的测定。
To measure tensile strength and breaking elongation of single yarn.
测定单根纱线的抗拉断裂强力断裂伸长。
To measure tensile strength and breaking elongation of single yard.
测定单根纱线的抗拉断裂强力和断裂伸长。
Characteristics analysis of acoustic emission signals from steel specimens under tensile fracture and fatigue crack condition
钢制试件拉伸断裂及疲劳开裂声发射特征分析
The modified tensile stress crack propagation criterion and influence of cranny hydraulic pressure on crack propagation
修正的拉应力裂纹扩展准则及裂隙水压对裂纹扩展的影响
FRACTURE MECHANISM ANALYSIS OF TENSION ROCKER BEARING CABLES AT THE SUBSIDIARY PIER IN A PC CABLE-STAYED BRIDGE
PC斜拉桥辅助墩拉力摆断裂的成因分析
Study on Cable Breakage and Fracture of Long-span Cable-stayed Bridge
对大跨径斜拉桥拉索破损断裂性能的研究
Research on Dynamic Simulation Methodology for Cable Loss of Cable-Stayed Bridges
斜拉桥拉索断裂损伤的动力过程模拟方法研究
Study of the Effects of the Breaking of Cables on the Dynamic Performance of Cable-stayed Bridges
斜拉索断裂对斜拉桥动力性能的影响研究
PALEOEARTHQUAKE STUDIES ALONG NALINLAKA FAULT OF LATE PLEISTOCENE IN LHASA,TIBET
拉萨那林拉卡断裂带晚第四纪古地震研究