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Model-based parameter identification of comprehensive friction behaviors for giant forging pressLI Yi-bo(李毅波), PAN Qing(潘晴), HUANG Ming-hui (黄明辉) (State Key Laboratory of High Performance Complex... velocity.Key words:friction; forging press; modified model; LuGre model; parameter identification......
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J. Cent. South Univ. (2018) 25: 1746-1754 DOI: https://doi.org/10.1007/s11771-018-3865-x Parameter sensitivities analysis for classical flutter speed of a horizontal axis wind turbine blade GAO...-Verlag GmbH Germany, part of Springer Nature 2018 Abstract: The parameter sensitivities affecting the flutter speed of the NREL (National Renewable Energy Laboratory) 5-MW baseline HAWT (horizontal......
J. Cent. South Univ. (2012) 19: 816-823 DOI: 10.1007/s11771-012-1077-3 Numerical and experimental evaluation on methods for parameter identification of thermal response tests WANG Feng-hao(王沣浩)1...., Ltd., Shanghai 200063, China ? Central South University Press and Springer-Verlag Berlin Heidelberg 2012 Abstract: Several parameter identification methods of thermal response test were evaluated......
by hyperbolic sine equation including Arrhenius term. Key words: aluminum alloy 7050; hot compression deformation; Zener-Hollomon parameter; deformation apparent activation energy ...,应力-应变曲线出现锯齿形波动,呈不连续动态再结晶特征；7050铝合金高温塑性变形时的流变行为可用包含Arrhenius项参数Z的双曲正弦函数描述. 关键词:7050铝合金；热压缩变形；Zener-Hollomon参数；变形激活能 中图分类号:TG146.2 文献标识码:A ......
J. Cent. South Univ. (2019) 26: 852-864 DOI: https://doi.org/10.1007/s11771-019-4054-2 Flow measurement and parameter optimization of right-angled flow passage in hydraulic manifold block HU Jian... image relocimetry; right-angled flow passage; parameter optimization Cite this article as: HU Jian-jun, CHEN Jin, QUAN Ling-xiao, KONG Xiang-dong. Flow measurement and parameter optimization of right......
喷射成形Al-22Si-5Fe合金的热变形行为及组织稳定性蔡元华1,梁瑞光2,苏占培2,张济山0(1.北京市北京科技大学新金属材料国家重点实验室2.山东省济宁市任城区农业机械管理局)摘 要:采用Gleeble-1500热模拟试验机在变形温度为573-723K,应变速率为0.005-0.05 s-1,最大变形量为30%的条件下对喷射成形Al-22Si-5Fe合金进行热模拟实验,同时利用OM和XRD对其组织稳定性进行了研究.结果表明,过共晶Al-22Si-5Fe合金的热变形行为同样可用包含Zener-Hollomon参数的模型来处理;低温变形时,沉积合金的变形激活能与纯Al的自扩散激活能一致,较高温度下的变形激活能明显高于纯Al的自扩散激活能,说明沉积合金中大量的第二相对变形会产生显著的影响;较低温加热时,沉......
-strain equation of 2197 Al-Li alloy is obtained: (14) Fig.6 Relationship between flow stress and Zener-Hollomon parameter The peak flow stress can be expressed by Z parameter: ... with the increase of deformation temperature and increases with the increase of strain rate. 2) The flow stress of 2197 Al-Li alloy during hot deformation can be expressed by a Zener-Hollomon parameter......
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