Results 31 to 40 of about 14,851 (148)
Jianzhu Gangjiegou Jinzhan, 2023 对304D不锈钢螺栓和QN1701端板攻丝连接与传统不锈钢螺栓连接的受力性能进行对比试验，研究单向受拉、单向受剪以及拉-剪复合受力状态下连接的破坏形态、受力机理和极限承载能力。试验结果表明：单向受拉时，不锈钢螺栓端板攻丝连接的极限承载力和变形与传统连接方式基本一致，但为避免发生垫片引起的连接失效，连接件开孔不应过大，且不应使用空腔墩头螺栓；单向受剪时，即使最小厚径比为0.67时，仍能满足栓杆剪断而攻丝板牙体无明显变形的破坏形态要求，考虑到试件表面未经处理，摩擦力失效快，不适用于摩擦型连接设计；拉 ...
卢倍嵘 +6 more
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, 2019 现代建筑中，组合结构的应用越来越普遍，为充分挖掘组合结构中材料的优越性能，对其受力机理及构造措施进行的研究。本文以 RCS 组合框架结构节点受力类型作为切入点，对钢筋混凝土柱—钢框梁受力机理进行分析和其构造措施进行论述，以及简单阐述美国、日本等国家的构造措施，以期为后续 RCS 组合框架结构在实际工程中的运用提供参考。
志勇 杨, 秀勇 岳
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Rare Metals, EarlyView.ABSTRACT The development of high‐performance and stable electrocatalysts for oxygen reduction reaction (ORR), oxygen evolution reaction (OER), and hydrogen evolution reaction (HER) plays a critical role in advancing clean energy technologies, including metal‐air batteries and hydrogen production through overall water splitting.
Chen‐Yu Cai +4 more
wiley +1 more source
, 2014 The artilce can be viewed at: http://www.tcea168.com.tw/075366270/images/files/10956.pdf建造業作為全球碳排放的主要來源之一，在 全球節能減排的趨勢下將發揮舉足輕重的作 用。近年來，爲了推行綠色環保建築，各國 都在積極地發展綠色建築評審標準和認證體 系。然而，這些標準和認證體系很少提及建 築材料和建築設備在生命週期內的碳排放量。 由於缺乏相關的量化和評核基準，建造業在 減少能耗 ...
He, Q, Ng, TST, Zou, W
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Rare Metals, EarlyView.ABSTRACT The evolution of the γ′−Ni3(Al, Ti) phase in superalloys is governed by a coupled coalescence‐ripening mechanism driven by elemental diffusion. In this study, thermal exposure experiments were performed at 750°C and 800°C for durations ranging from 100 to 20,000 h.
Zhaotian Wang +5 more
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Rare Metals, EarlyView.ABSTRACT High‐entropy alloys (HEAs) have attracted considerable interest from researchers owing to their tunable chemical compositions, exceptional structural stability, and promising catalytic properties. However, their large‐scale application is often hindered by complex manufacturing techniques and poor durability.
Sheng Guo +9 more
wiley +1 more source
Jianzhu Gangjiegou Jinzhan, 2018 圆钢管桁架在主管内填筑混凝土,可有效提高其承载力。为了获得圆钢管混凝土桁架K形节点受力性能和承载力计算方法,研究了在受拉或受压支管处K形节点的失效模式和破坏机理;基于圆钢管混凝土K形节点在不同失效模式下的破坏机理和受力状态,分别对支管截面形式为圆形或矩(方)形的圆钢管混凝土K形节点建立合理的简化计算模型,推导出不同失效模式下K形节点极限承载力计算公式,并给出相应的极限承载力建议公式。试验验证了圆钢管混凝土K形节点的试验值与计算值吻合较好,研究表明圆钢管混凝土K形节点的极限承载力计算公式的准确性 ...
王静峰, 邓权, 邢文彬
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Rare Metals, EarlyView.ABSTRACT The development of sodium‐ion batteries (SIBs) is limited by slow charge transfer kinetics and large material volume changes caused by the large radius of Na+. Leveraging the excellent physicochemical properties and unique heterostructures of metal selenides, ultrafine hetero‐CuFeSe2‐CoSe2 nanoparticles are in situ wrapped by ...
Ying Zhu +5 more
wiley +1 more source
Shiyou jixie, 2014 弹性爪机构是海上完井滑套开关工具中最重要的部件，其力学性能稳定性对于作业成败至关重要。基于受力分析和有限元模拟，建立开关工具弹性爪力学理论模型和三维有限元分析模型，研究弹性爪结构应力分布与作业性能。基于受力理论分析可知，弹性爪机构最大轴向拉力为4 116 N，最大应力为675 MPa；基于有限元模拟计算，弹性爪机构最大轴向拉力为3 924 N，最大应力747 MPa，弹性爪结构强度满足要求。功能试验结果表明，理论计算方法存在一定的误差，有限元模拟结果相对比较精确和可靠 ...
刘传刚 +4 more
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