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的疲劳裂纹扩展抗力. 关键词:SiCp/Al复合材料；疲劳短裂纹扩展；裂纹闭合；裂纹偏析 中图分类号:TG146.2+1 文献标识码: A Effect of SiC particulates on small fatigue crack growth behavior of SiCp/2009Al composite... and 2009Al thin layer above it, and hence inducing crack closure in composite during small fatigue crack growth. And the mound-like shape also causes crack deflection in composite, thus reduces......
J. Cent. South Univ. (2017) 24: 423-431 DOI: 10.1007/s11171-017-3444-1 Effects of water intrusion and loading rate on mechanical properties of and crack propagation in coal–rock combinations CHEN... storage in collieries in arid regions requires knowledge of the effect of water intrusion and loading rate on the mechanical properties of and crack development in coal–rock combinations. Fifty-four......
on the results of the frequency sweep and crack detection. And the decrease rate of resonant frequency can reveal the fatigue crack growth of the specimen. 2) Some nonlinear vibration phenomena occur when..., the experimental results of the fatigue behavior of compressor blade specimen subjected to resonance and the effects of a damping hard coating on relieving the fatigue progress are presented. The crack......
, such as fatigue life, crack propagation, rigidity loss as well as damage behavior of bonding interface, were studied. The mechanism of the constructional bars on the fatigue properties of the composite beams..., to reducing the stress amplitude of bars and the crack width of composite layer, and to increasing the durability and fatigue life of the composite beam. Key words: steel fiber reinforced self-stressing......
Physical Essence of Long Fatigue Crack Growth Behavior for Aluminum－lithium Alloy陈铮,倪永峰摘 要:ＰｈｙｓｉｃａｌＥｓｓｅｎｃｅｏｆＬｏｎｇＦａｔｉｇｕｅＣｒａｃｋＧｒｏｗｔｈＢｅｈａｖｉｏｒｆｏｒＡｌｕｍｉｎｕｍ－ｌｉｔｈｉｕｍＡｌｌｏｙＣｈｅｎＺｈｅｎｇａｎｄＮｉＹｏｎｇｆｅｎｇ(陈铮)(倪永峰)(ＤｅｐａｒｔｍｅｎｔｏｆＭａｔｅｒｉａｌｓＳ...关键词:......
. The testing fatigue crack propagation rate of AZ91HP was decreased in the order of artificial aging, die casting and supersaturated solution treatment, as shown in Fig.6. Where the value of crack length... crack length; n is the applied cycles and l is the number of cycles. Fig.5 Fatigue crack propagation rate at 50 Hz load frequency Fig.6 Fluid field simulation result 5 Application of AM50......
with the increase of confining pressure and temperature. Peak crack axial strain increases nonlinearly with the inelastic compliance and the increase rate increases gradually. Crack initiation strain has... the unstable crack growth stage until the stress reaches the peak value because of crack propagation. The last phase is post-peak stage where the stress drops till residual strength. Figure 2 Progressive......
Liang, YANG Shou-jie, DAI Sheng-long. Effects of precipitates on fatigue crack growth rate of AA 7055 aluminum alloy[J]. Transactions of Nonferrous Metals Society of China, 2010, 20(12): 2209-2214. [10...≈2×106)的疲劳断口形貌 Fig. 3 Fatigue fractographies of smooth specimens (Nf ≈2×106): (a) Three different fracture regions; (b) Fatigue crack initial stage; (c) Region of stable crack growth; (d) Fast......
, both of the high temperature-short time artificial aged and naturally aged samples have the similar tensile strength. The fatigue crack growth rate tests indicates that the fatigue crack growth of high...经过高温短时人工时效后的L-T向疲劳裂纹扩展速率降低了. 图2 室温,大气环境下测定的2524合金在应力比R＝0.1时的L-T向疲劳裂纹扩展速率 Fig.2 Fatigue crack growth rate vs applied ΔK for 2524 aluminum alloy at L-T direction 图3所示为2524合金经过T351以及 170......
and fatigue crack propagation rate and other test methods, the effects of natural aging and artificial aging on the mechanical properties, fatigue crack growth performance and the microstructure... Effect of creep forming time on fatigue crack propagation rate of alloy 在人工时效状态下,蠕变成形时间对合金疲劳裂纹扩展速率的影响较小,3条曲线基本重合(如图4(b)所示),其中蠕变成形8 h的da/dN值较另外两种制度更小且非常稳定,在稳态扩展阶段da/dN基本保持在1×10-4~2×10-4 mm/cycle......
