Advances in Material Engineering and Mechanical Engineering by Edited by Liang Gao PDF

By Edited by Liang Gao

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Results analysis The load capacity. The analytical results of yield load, ultimate load and the ductility are showed in table 1. The ductility coefficient µ is calculated by the ratio of ultimate displacement δu to yield displacement δy[7]. Table 1.The analytical results of shearwalls. Specimen Crack load Yield load Ulitimate load Numbers Fc[KN] Fy[KN] Fu[KN] BSWA-00-40 BSWA-10-40 BSWA-15-40 BSWA-20-40 BSWA-10-30 BSWA-10-70 120 150 185 210 120 230 275 315 350 300 280 385 300 335 365 355 319 445 The load value of shearwalls about the first series show that the crack load, yield load and ultimate load of shearwalls increase with the increase of the volume fractions of steel fibers.

Rare Metals Letters , 2004 , 23 (5) : 15220 (in Chinese). [2] BOUTROS M K. Testing and verification of the model[J]. Thin-Walled Structures, 1999, 33: 69-82. [3] ARMAS AF, HERENU S, BOLMARO R,et al. Cyclic softening mechanisms of zircaloy-4[J]. J Nucl Mater, 2004, 326: 195-200. [4] DENG Aiming, YANG Hongya, LI Yuanrui, et al. Low-cycle fatigue of thin-walled tube of Ti alloy in high temperature environment[J]. Journal of University of Science and Technology Beijing, 2001, 23: 71-72(in Chinese).

The rate of response and the control accuracy are the key of controlling the HDBS. The HDBS under the PWM high speed on/off has the excellent rate of response and the control accuracy, which has great prospects in petroleum drilling Engineering. Model of HDBS Controlled by the PWM Valve Model of Braking Process. The hydraulic cylinder controlled by the proportional valve is usually modeling by linear analyzing the flow though the port of the control valve. The flow though the PWM high speed on/off valve [3] automatically is linear the duty ratio of valve port at the pressure point [4,5,6].

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Advances in Material Engineering and Mechanical Engineering by Edited by Liang Gao

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