期刊文献+
共找到5篇文章
< 1 >
每页显示 20 50 100
Forming Condition and Geology Prediction Techniques of Deep Clastic Reservoirs 被引量:2
1
作者 QIAN Wendao YIN Taiju +4 位作者 ZHANG Changmin HOU Guowei HE Miao Xia Min Wang Hao 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 2017年第S1期255-256,共2页
1 Introduction As new exploration domain for oil and gas,reservoirs with low porosity and low permeability have become a hotspot in recent years(Li Daopin,1997).With the improvement of technology,low porosity and low
关键词 LI forming Condition and Geology Prediction techniques of Deep Clastic Reservoirs
下载PDF
Three-Dimensional Rigid-Plastic FEM Simulation of Bulk Forming Processes with New Contact and Remeshing Techniques 被引量:1
2
作者 Debin Shan and Youngsuk Kim School of Mechanical Engineering, Kyungpook National University, Taegu 702-70 1, South Korea Hyunsoo Kim Graduate School of Mechanical Engineering, Kyungpook National University, Taegu 702-701, South Korea E-mail: shandb@public 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2001年第3期329-332,共4页
Some techniques such as die surface description, contact judgement algorithm and remeshing are proposed to improve the robustness of the numerical solution. Based on these techniques, a three-dimensional rigid-plastic... Some techniques such as die surface description, contact judgement algorithm and remeshing are proposed to improve the robustness of the numerical solution. Based on these techniques, a three-dimensional rigid-plastic FEM code has been developed. Isothermal forging process of a cylindrical housing has been simulated. The simulation results show that the given techniques and the FEM code are reasonable and feasible for three-dimensional bulk forming processes. 展开更多
关键词 Three-Dimensional Rigid-Plastic FEM Simulation of Bulk forming Processes with New Contact and Remeshing techniques FEM Simulation
下载PDF
Plasma Spray Forming
3
作者 FANG Jian-cheng 1, XU Wen-ji 2, SHI Yu-ying 1 (1.College of Mechanical Engineering and Automation, HQU, Quanzhou 362011, China 2.School of Mechanical Engineering, DUT, Dalian 116023, China) 《厦门大学学报(自然科学版)》 CAS CSCD 北大核心 2002年第S1期33-34,共2页
In the course of plasma spray, the plasma jet is comprehensively functioned by such effects as thermal pinch, magnetic pinch and mechanical compression and the flow is jetting at a high speed, the energy is concentrat... In the course of plasma spray, the plasma jet is comprehensively functioned by such effects as thermal pinch, magnetic pinch and mechanical compression and the flow is jetting at a high speed, the energy is concentrated and its center temperature is so high as to reach upwards of 15 000 ℃ which is capable of melting various kinds of materials inclusive of ceramic, it has a broad applied prospects in the fields of automobile, electronics, telecommunications, medical treatment, air navigation & space navigation and light industries etc because of being able to rapid fabricate thin-walled metals, ceramics and alloy parts thereof, metal moulds, functionally gradient material moulds and so on, and it has become a research spotlight for the scholars. The technology of plasma spray forming (PSF) is introduced, and the two different kinds of technique presented in this paper are studied. Some typical links in the course of technical process is also analyzed, including original prototype fabrication and surface treatment, post-treatment of formed workpiece and demoulding methods. When spraying, it should select the appropriate making methods of prototype according to the dimensions, shapes and forming accuracy as required by the formed parts. At the same time, it should be paid to the characteristic of the material for the prototype. The main purpose of surface treatment of the prototype is to raise the quality of formed parts and ensure the integrity demoulding of the coating. The method of the prototype’s surface treatment is closely related to the demoulding method, which is mainly comprised of destructive demoulding, non-destructive demoulding and composite demoulding, and is key technology in PSF. In order to eliminate these intrinsic defects and improve its performance, the fabricated parts can be given the necessary post-treatment so as to further raise the mechanical strength and surface quality. There are many methods for the post-treatment such as chemical reinforcment, metal melt-infiltration, laser-melting and self-propagating high-temperature synthesis, etc., all these methods can decrease the porosity and raise the quality of coating and service performance; whereas the finishing machining can improve the surface roughness of spray formed parts. In the course of spray forming, affected by such complex and complicated factors as electric field, the entangled ambient gas and introduced powder, as a result, it shall induce the instability of the spray condition and affect the forming quality. This paper has, on the basis of large quantity of experiments, analyzed every links in the course of PSF, summarized and evaluated the main factors affecting on the quality of formed parts, such as prototype characteristic, characteristic of plasma jet, powder characteristic, spray gun and spray parameters. The experiments prove that the process of PSF is simple and the cost is lower in rapid tooling with complex and complicated fine patterns, and PSF is apt to form special-shape and thin-walled parts made of some protective materials so as to protect those fragile workpieces. Therefore PSF is a new technology with broad and brilliant prospects of development. 展开更多
关键词 PLASMA spray forming forming technique
下载PDF
Nanometeric hydroxyapatite in situ formed in demineralized bone matrix by electrochemical technique
4
《Chinese Journal of Biomedical Engineering(English Edition)》 2001年第3期130-132,共3页
关键词 BONE Nanometeric hydroxyapatite in situ formed in demineralized bone matrix by electrochemical technique DBM
下载PDF
The review forms of the Appraisal Activities of the Products,Techniques and Applications Projects of BIRTV
5
《现代电视技术》 2004年第S1期152-154,共3页
关键词 The review forms of the Appraisal Activities of the Products techniques and Applications Projects of BIRTV
下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部