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| 1 | 模拟引潮力作用下岩石破坏前兆的实验研究——加卸载响应比(LURR)理论和能量加速释放(AER)显示文摘大地震前加卸载响应比升高和能量加速释放这2种现象可以用来对地震进行中期预报。同时,加卸载响应比升高和能量加速释放有相同的物理机制。实验对于揭示地壳岩石的变形和破坏规律是非常重要的。在三轴应力条件下进行了岩石破坏声发射实验,声发射技术是研究岩石变形破坏微观机理的重要手段。为了模拟日月引潮力对地球的加载和卸载作用,在一常数加载率的轴向压力作用下,叠加上微小的正弦扰动,力求能够模拟地下岩石复杂的受力状态。实验过程中记录到大量的声发射信息,声发射记录包括声发射发生的时间、空间坐标和振幅,它能够反映岩石试件内部每一个损伤(微裂纹)发生的时间、地点和强度。利用声发射记录系统地分析了岩石试件破坏前能量释放及加卸载响应比的演化情况,结果显示,岩石试件宏观破坏前出现了能量加速释放及加卸载响应比剧增这2种前兆现象,从而对地震临界点理论给予了实验支持,同时也为地震预测提供了实验依据。 | 张晖辉 尹祥础 梁乃刚 李世愚 余怀忠 Y.C.Wang C.Yin Victor Kukshenko Nikita Tomiline Surguei Elizarov | 2005 | 岩石力学与工程学报2005，24，17： | 16 |
| 2 | 超薄膨胀型钢结构防火涂层的耐湿热性能显示文摘为考察超薄膨胀型钢结构防火涂层的防火隔热性能在某一特定环境下随使用时间的变化规律,对36个试件进行了人工加速老化试验和隔热性能试验.结果表明:高湿度环境下,涂层阻燃体系中的亲水性物质(如APP)会迁移到涂层表面而被溶解,使阻燃体系的组分和配比发生变化,导致高温下阻燃体系的膨胀受阻,从而影响到膨胀倍率和膨胀层内部结构,最终导致膨胀层等效导热系数变大;1,2 mm涂层试件的等效导热系数随老化时间总体上呈现出相同的变化规律,与0次循环试件相比,2,4次循环试件涂层的λ仅增大了1.0%左右,21次循环试件涂层的λ增大了30.0%,与21次循环试件相比,42次循环试件涂层的λ仅增大了3.0%左右,表明经过21次循环以后,涂层已达到一个稳定状态. | 王玲玲 李国强 Y.C.WANG | 2011 | 建筑材料学报2011，14，1： | 4 |
| 3 | 冷弯薄壁钢短柱在均匀高温下的性能显示文摘本篇文章对常温及均匀高温条件下的冷成型薄壁短槽钢的轴向强度进行了初步研究。对常温及均匀高温下的一系列卷边的或非卷边的槽钢进行了试验研究。应用一系列的设计方法和商业化的有限元软件ABAQUS( 1998)对试验进行了分析。本文中涉及的设计方法包括 :英国规范BS5 95 0 ( 1987)、欧洲规范Eurocode 3Part1.3 (CEN1996)和美国规范AISI( 1996) ,在有限元分析中 ,考虑了几何非线性和材料非线性。高温下钢材的应力 -应变曲线根据欧洲规范Eurocode 3Part 1.2(CEN1995 )和Qutinen ( 2 0 0 1)采用。在某些试验中发现扭转屈曲 ,为了扩展针对这种破坏模式的设计方法 ,在这些规范中引用了Yong和Hancock( 1992 )考虑扭转屈曲的方法。对设计规范BS5 95 0Part 5 ( 1987)、欧洲规范Eurocode 3Part 1.3(CEN1996)和美国规范AISI( 1996)中常温下薄壁柱的设计方法加以修改 ,来考虑钢材高温下的强度和刚度的变化。从试验结果、规范预期的结果和数值分析的比较可见 。 | M.Feng Y.C.Wang J.M.Davis 周宏宇 | 2004 | 建筑钢结构进展2004，6，3： | 3 |
| 4 | Enhancement of shear stability of a Fe-based amorphous alloy using electrodeposited Ni layers显示文摘Tensile and fracture behaviors of sandwich-structured composites consisting of a Fe-based amorphous layer with a constant thickness and ultrafine-grained Ni layers with different thicknesses were investigated. The results indicate that the initiation and the stable propagation of the shear band in the amorphous layer was dominated by the Ni layers due to their strong constraint role. The catastrophic fracture of the amorphous layer was postponed in the sandwich composites through properly increasing the constrained Ni layer thickness, which effectively decreased the shear stress on the shear fracture planes of the amorphous layer, and thus led to stable propagation of the primary SB characterized by the increase in the smooth region size of the shear band. | Y.C.Wang X.M.Luo L.J.Chen H.W.Yang B.Zhang G.P.Zhang | 2018 | Journal of Materials Science & Technology2018，34，12： | 1 |
| 5 | Solid-state alloying of Al-Mg alloys by accumulative roll-bonding:Microstructure and properties显示文摘In this study,a novel solid-state alloying approach was adopted to fabricate Al-Mg alloys with high Mg contents(C_(Mg)) by accumulative roll-bonding(ARB)of Al and Mg elemental materials to ultrahigh cycles.Experimental results showed that the degree of alloying increased with the increase of ARB cycles and a supersaturatedα-Al solid solution accompanied with nanoprecipitates was formed in the Al-Mg alloys by ARB to 70 cycles.The as-prepared Al-Mg alloys exhibited enhanced mechanical properties,with a maximum tensile strength of∼615 MPa and a tensile elongation of∼10%at C_(Mg)=13 wt.%.The high strength can be attributed to different mechanisms,namely solid solution strengthening,grain boundary strengthening,dislocation strengthening,and precipitation strengthening.The Al-Mg alloys showed increased work hardening with increasing C_(Mg),due to the enhanced formation of nanoprecipitates.Meanwhile,no obvious drop in the intergranular corrosion(IGC)resistance was found in the Al-Mg alloys with C_(Mg) up to 13 wt.%.Moreover,sensitization treatment was found to induce little decrease in the IGC resistance of the Al-Mg alloys with C_(Mg)≤13 wt.%.We found that the excellent IGC resistance was due to the suppression of grain boundary precipitation by the preferred formation of precipitates within the grains that were induced by ARB.Our study indicated the novelty of the present solid-state alloying approach to achieving a superior combination of high mechanical properties and IGC resistance in Al-Mg alloys. | X.M.Mei Q.S.Mei J.Y.Li C.L.Li L.Wan F.Chen Z.H.Chen T.Xu Y.C.Wang Y.Y.Tan | 2022 | Journal of Materials Science & Technology2022，，30： | 1 |
| 6 | Structural performance of lightweight steel-foamed concrete-steel composite walling system under compression显示文摘 | Md Azree Othuman Mydin Y.C.Wang | | 0，，02： | 1 |
| 7 | Fractional programming methodology for multi-attribute group decision-making using IFS显示文摘 | D.F.Li Y.C.Wang S.Liu F.Shan | | 0，，01： | 1 |
| 8 | Mechanical properties of foamed concrete exposed to high temperatures显示文摘 | Md Azree Othuman Mydin Y.C.Wang | | 0，，26： | 1 |
| 9 | IMPROVED PROCESSING FOR MICROSTRUCTURES AND MECHANICAL PROPERTIES OF A COMMERCIAL PIPELINE STEEL显示文摘The transformation productions of hot-deformation simulation experiments were investigated using a Gleeble-1500 hot simulator for a commercial pipeline steel. Based on the investigation results, the improved thermo-mechanical control processing (TMCP) schedules containing a two stage multi-pass controlled rolling coupled with moderate cooling rates were applied to hot rolling experiments and acicular ferrite dominated microstructure was obtained. Microstructures and mechanical properties of hot rolled plates were related to TMCP processing, and regression equations describing the relation between processing parameters and mechanical properties in the current TMCP were developed, which could be used to predict mechanical properties of the experimental steel during commercially processing. It was found that with an increase in cooling rate after hot rolling, grain size in the microstructure became smaller, the amount of polygonal ferrite decreased and acicular ferrite increased, and accordingly mechanical properties increased. | Y.C.Wang Y.S.Li M.C.Zhao K.Yang | 2005 | Acta Metallurgica Sinica(English Letters)2005，18，2： | 0 |
| 10 | THERMAL STRUCTURAL DISORDER AND MELTING TRANSITION IN HIGH-ANGLE GRAIN-BOUNDARY: A MOLECULAR-DYNAMICS STUDY显示文摘A structural transition in the fcc ∑=5 (120)/[001] high-angle tilt grain-boundary(GB)is investigated by molecular-dynamics simulation. The calculations have been performed at various temperutures and the thermodynamic melting point Tm of the model system is determined by using a many-body potential fitted to copper. A thermal disorder transition in the GB region occurs well below the melting point. Our results indicate that such a transition is a continuous process and there is no evidence of premelting, which is entirely in accord with experiment results and theoretical prediction.Moreover we also observed that melting initiated at the interface and then propagated into the bulk quickly at or above Tm. | S.J.Zhao Y.C.Wang J.Q.You Q.B.Yang L.G.Zhou H.Q.Ye | 1998 | Acta Metallurgica Sinica(English Letters)1998，11，5： | 0 |
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