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CFRP/铝合金叠层结构动态钻削力预测研究 被引量:8
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作者 于海夫 薛惠峰 《机械科学与技术》 CSCD 北大核心 2017年第1期68-73,共6页
建立了CFRP(carbon fiber reinforced plastics)/铝合金叠层结构制孔轴向力分阶段预测模型,提出一种面向分阶段的钻削过程描述方法。阐述了CFRP与铝合金的叠层方式,根据钻削过程中钻头所处位置确定不同的钻削阶段;在钻削过程分析的基础... 建立了CFRP(carbon fiber reinforced plastics)/铝合金叠层结构制孔轴向力分阶段预测模型,提出一种面向分阶段的钻削过程描述方法。阐述了CFRP与铝合金的叠层方式,根据钻削过程中钻头所处位置确定不同的钻削阶段;在钻削过程分析的基础上,通过解析建模方法给出了叠层结构动态轴向力预测方法,并详细分析了模型公式中积分限的计算方法;进行了叠层结构制孔实验,测量分阶段的瞬时制孔轴向力。通过对比发现提出的预测模型与实验值吻合较好,能够准确预测CFRP/铝合金叠层结构制孔轴向力。 展开更多
关键词 钻削力 预测模型 制孔实验
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Selective electroreduction of carbon dioxide to formic acid on electrodeposited SnO_2@N-doped porous carbon catalysts 被引量:5
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作者 Lu Lu Xiaofu Sun +4 位作者 Jun Ma Qinggong Zhu Congyi Wu Dexin Yang Buxing Han 《Science China Chemistry》 SCIE EI CAS CSCD 2018年第2期228-235,共8页
Electrocatalytic reduction of CO_2 is a promising route for energy storage and utilization. Herein we synthesized SnO_2 nanosheets and supported them on N-doped porous carbon (N-PC) by electrodeposition for the first ... Electrocatalytic reduction of CO_2 is a promising route for energy storage and utilization. Herein we synthesized SnO_2 nanosheets and supported them on N-doped porous carbon (N-PC) by electrodeposition for the first time. The SnO_2 and N-PC in the SnO_2@N-PC composites had exellent synergistic effect for electrocatalytic reduction of CO_2 to HCOOH. The Faradaic efficiency of HCOOH could be as high as 94.1% with a current density of 28.4 mA cm-2 in ionic liquid-MeCN system. The reaction mechanism was proposed on the basis of some control experiments. This work opens a new way to prepare composite electrode for electrochemical reduction of CO_2. 展开更多
关键词 CO2 reduction electrocatalyst ionic liquid porous carbon green chemistry
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