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: 1672-7207(2005)03-0486-05 Automatic formation method of prospecting lineprofile map based on drill hole database CHEN Jian-hong, ZHOU Zhi-yong, CHEN Gang, GU De-sheng (School of Resources..., including incline drill hole calculating, simple type ore body linking and manually aided drawing of fault, etc. In the end, the formations of straight and non-straight drill hole type prospecting line......
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; 文献标志码:A Application of deep hole drilling technique on stress measurement of aluminum alloy component LIAO Kai, LIU Yi-peng, CHANG Xing-yu, ZHAO Qing (School of Mechanical and Electronic... the component. The deep hole drilling (DHD) technique is a effective method to determine the stress within complicated engineering components. The mechanism of DHD and simulation experiment process were......
prepared by straight cylindrical pin and threaded cylindrical pin. The effect of rotational speed and welding speed on the hole defect was investigated, and the microstructure of the FSW joint was observed. The results show that when the straight cylindrical pin is used at an inappropriate ratio of rotational speed to welding speed, continuous hole (or tunnel) at the bottom of advancing side forms......
method based on the size of hydrolysis hole was described here, but this method was not very accurate that could only be used in preliminary screening. To further improve the accuracy, a micro-plate...-mannanase; Pichia pastoris; high-production strains; hydrolysis hole screening method; micro-plate screening method......
A novel hole cold-expansion method and its effect on surface integrity of nickel-based superalloyXian Cao1,Ping Zhang1,Shuang Liu1,Xue-Lin Lei1,Run-Zi Wang1,Xian-Cheng Zhang2,Shan-Tung Tu11. Key... around the hole wall is one of the key parameters to ensure the optimized performance of hole components for nickel-based superalloy. The novel hole cold expansion technique introduced in this work......
基于应力和变形值最小的复合材料含孔板孔形参数有限元优化 李成1,铁瑛1 (1.郑州大学机械工程学院,河南郑州,450001) 摘要:本文基于对复合材料孔板主承力接触区的有限元强度分析结果,利用APDL参数化有限元分析技术,以孔板第一主应力Sl和X方向上的变形UX的最大值作为目标函数,对孔形参数进行优化.设计出基于应力和变形最小的开口形状,并得出了孔形参数与应力,变形之间的相互关系. 关键词:复合材料; 开孔板; 孔形; 应力; 变形; composite materials; plate with hole; hole shape; stress and displacement; APDL; [全文内容正在添加中] ......
low-cycle fatigue of GH4169 alloy with hole structure[J]. The Chinese Journal of Nonferrous Metals, 2021, 31(3): 691-698. DOI: 10.11817/j.ysxb.1004.0609.2021-35943 疲劳失效是影响飞行器服役安全的重大问题.据报道[1],疲劳失效占发动机系... Sheet fatigue specimens with central hole (Unit: mm) 采用MTS-810液压伺服试验机测试了4种状态下的疲劳性能,温度为600 ℃,应力为820 MPa,频率为4 Hz,应力比R=0.1；采用PROTO LXRD的Mn Kα靶测试了在600 ℃时效1,10,20,50,100,200和500 h后的残余应力场,衍射角为152°.测试时,据孔边......
Numerical simulation of parallel hole cut blasting with uncharged holesShijie Qu Xiangbin Zheng Lihua Fan Ying Wang School of Civil and Environmental Engineering,University of Science and Technology Beijing,Beijing 100083,China摘 要:<正>The cavity formation and propagation process of stress wave from parallel hole cut blasting was simulated......
of the drilled holes. Key words: Al 1050 sheet; pulsed Nd?YAG laser; process parameters; drilled hole formation; temperature distribution; optimal drilling condition ... of the hole and crumbling of the cut section, induced by direct contact of tools with the sheet metal [3, 5]. The merits of a Nd?YAG laser, including a high energy density, distinguished focusing......
