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stiffness and changes of thickness after sewing are studied. These properties will provide input data for CAD pattern design. Key words: 3D reinforcement; textile preform; bending stiffness; thickness; CAD... As an example, the following procedures demonstrate how to finish a rotor preform from carbon-PEEK fabric. 2.1 Pattern design In this process the 2-dimensional pattern will be calculated from cubic......
forging; preform design; backward tracing scheme; FEM 1 Introduction A blade is one of the most important mechanical components in aero-engine. Due to a complicated shape of workpiece and the limited workability of material, one or more preforming processes stages are typically employed to ensure high quality of the blade. Thus, preform design is one of the most important aspects in the blade......
in an optimization procedure for the preliminary preform tool design in multi-stage cold forging processes. This optimization problem aims to minimize the equivalent plastic strain and the punch force during the forging process. The preform tool shapes are represented by B-Spline curves. The vertical positions of the control points of B-Spline are taken as design variables. The evolution......
phases. The lower the density of preform , the higher the densification of C/C-SiC composites after infiltrating Si is. But the increment of the density after infiltrating Si does not monotonely increase with the open porosity of preform. The density after infiltrating Si only increases more in preform fabricated by IC although its open porosity is lower.The resin carbon in preforms is easier to react......
Ultrasonic vibrating system design and tool analysis Kei-Lin KUO Department of Vehicle Engineering, National Taipei University of Technology, Taipei 10608, China Received 2 March 2009... to optimize processing efficiency, through the use of the finite element method for design and analysis of the milling tool. In addition, changes can be made to the existing vibrating system......
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Solidification and remelting of Al through Al2O3 fibrous preform under centrifugal force HU Guo-xin(胡国新), LIU Jian-ju(刘建局), ZHANG Li-xiang(张利祥), TIAN Qin-wei(田芩蔚) School of Mechanical and Power... preform under centrifugal force field were modeled numerically. The results show that the transient solidification and remelting phenomena appear on the infiltration front and can be divided into two......
J. Cent. South Univ. Technol. (2011) 18: 153-158 DOI: 10.1007/s11771-011-0673-y Lightweight design of 45 000 r/min spindle using full factorial design and extreme vertices design methods PARK Seong-jin, LEE Choon-man, HWANG Young-kug Department of Mechanical Design and Manufacturing Engineering, Changwon National University, Changwon 641-773, Korea ? Central South University Press......
composites.The conglomera- tions are of almost sphericity after conglomerated.There are large pores among the conglomerations and small pores within them- selves in the preform according to the design...Design,preparation,and structure of particle preforms for Si3N4(P)/Si3N4 radome composites prepared using chemical vapor infiltration processYongsheng Liu Laifei Cheng Litong Zhang Yongdong Xu Yi Liu......