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. Key words: magnesium alloy; atmospheric corrosion; simulating acid rain; wet-dry cycle  ... of time of wet-dry cycle on the corrosion of AZ91 magnesium alloy. 2 Experimental 2.1 Materials and specimen preparation AZ91D magnesium alloy was used with the composition of 8.3%-9.7% aluminum......
that the crack depth has a significant effect on chloride profiles beyond the crack tip. However, crack width, wet-dry cycle and initial saturation have little influence on the ingression of chloride ions in concrete and crack. Key words: chloride; cracked concrete; dual porous medium model; wet-dry cycle 在氯盐侵蚀环境中,干湿交替区域对应有害介质侵蚀最为严重的结构部位,是混凝土结构耐久性设计的关键[1-2],但是,国内外对此研究均是基于完好的混凝土结构进行的.而对于服役混凝土结构来说,各种原......
cycles. After each cycle, the ultrasound velocity measurements were employed to monitor the deterioration process. For the specimens that have suffered three wet-dry cycles, the mechanical properties... (95% RH; RH is the relative humidity) and drying (15% RH) before ready for the tests. Each wet-dry cycle cost two month: at least one month for wetting until the specimens reached around 20% water......
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Improved Cycle Properties of FeS2 Cathode Material with Metallic Additives Ki-Won Kim1,Gouri Cheruvally2,Jae-Kwang Kim2,Hyo-Jun Ahn1,Jou-Hyeon Ahn2,Jae-Won Choi2,Dong-Kyu Park3 (1.School of Nano...% Ni resulted in an enhancement of the first discharge capacity giving 571 and 844mAh/g respectively at 0.1C-rate. The cycle performance was also enhanced remarkably by the addition of these electrically......
Fitting diagram of model parameters under different dry-wet cycles 本构模型中,干湿循环后弹性模量EN,泊松比,内摩擦角φ和轴向应力与应变均可通过常规三轴试验获取.由于裂土的应力-应变曲线为硬化型,并不存在峰值点,因此,采用线性拟合获取统计损伤模型的参数. 联立式(6)和(23),对函数两边分别取对数: (25) 式中:.可由式(24... damage stress threshold values of different dry-wet cycles (σ3=300 kPa) 图6所示为初始损伤应力门槛值随干湿循环次数变化,由图6可知:随着围压增加,初始损伤应力门槛值总体呈增大趋势.以12次循环后的试样为例,300 kPa应力水平下的试样初始损伤应力门槛值比100 kPa应力水平下高74.27 kPa,表明围压对干湿循环阶段产生的裂隙有压......
(2): 91-97. [7] INFANTE FERREIRA C A, ZAMFIRESCU C, ZAVTSEV D. Twin screw oil-free wet compressor for a compression–absorption cycle [J]. Refrigeration, 2006, 29(4): 556-565. [8] ROY P, DESILETS M...J. Cent. South Univ. (2012) 19: 797-802 DOI: 10.1007/s11771-012-1074-6 Thermodynamic analysis of simplified dual-pressure ammonia-water absorption power cycle HUA Jun-ye(华君叶), CHEN Ya-ping(陈亚平......
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High cycle fatigue properties of die-cast magnesium alloy AZ91D-1%MM XU Yu-lei(徐玉磊)1, ZHANG Kui(张 奎)1, LI Xing-gang(李兴刚)1, LEI Jian(雷 健)2, YANG Yuan-sheng(杨院生)3, LUO Tian-jiao(罗...; Abstract: The high cycle fatigue......