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基于位移反求加载法的高精度皮卡车架疲劳开发与验证
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作者 邓欲斌 蒋瑜 于人杰 《汽车工程学报》 2021年第2期102-106,共5页
车架是皮卡的重要总成,由于承受各种载荷冲击,所以容易产生开裂问题影响使用寿命。皮卡车架的疲劳预测选择了精度较高的基于位移反求加载法,结合试验场采集载荷谱数据与皮卡整车多体动力学模型,以相关性较高的整车内部响应信号(悬架位... 车架是皮卡的重要总成,由于承受各种载荷冲击,所以容易产生开裂问题影响使用寿命。皮卡车架的疲劳预测选择了精度较高的基于位移反求加载法,结合试验场采集载荷谱数据与皮卡整车多体动力学模型,以相关性较高的整车内部响应信号(悬架位移信号、整车轴头Z向加速度信号、转向拉杆力标定信号)为目标信号,迭代反求整车等效位移激励信号,进而分解获取车架边界载荷谱,最后基于Miner线性累积损伤理论对皮卡车架进行疲劳分析、对标及优化,优化后的实车通过台架试验验证。 展开更多
关键词 位移反求加载法 皮卡车架 疲劳开发 载荷谱 虚拟迭代
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Science and technology in high-entropy alloys 被引量:95
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作者 张蔚冉 Peter K.Liaw 张勇 《Science China Materials》 SCIE EI CSCD 2018年第1期2-22,共21页
As human improve their ability to fabricate materials, alloys have evolved from simple to complex compositions, accordingly improving functions and performances,promoting the advancements of human civilization. In rec... As human improve their ability to fabricate materials, alloys have evolved from simple to complex compositions, accordingly improving functions and performances,promoting the advancements of human civilization. In recent years, high-entropy alloys(HEAs) have attracted tremendous attention in various fields. With multiple principal components, they inherently possess unique microstructures and many impressive properties, such as high strength and hardness, excellent corrosion resistance, thermal stability, fatigue,fracture, and irradiation resistance, in terms of which they overwhelm the traditional alloys. All these properties have endowed HEAs with many promising potential applications.An in-depth understanding of the essence of HEAs is important to further developing numerous HEAs with better properties and performance in the future. In this paper, we review the recent development of HEAs, and summarize their preparation methods, composition design, phase formation and microstructures, various properties, and modeling and simulation calculations. In addition, the future trends and prospects of HEAs are put forward. 展开更多
关键词 high-entropy alloys multiple principal components microstructures and properties phase formation modeling and simulation calculations
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