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Microscopic study of mode I crack tip deformationDeshun Fan, Caifu Qian, and Zhongjun JiangCollege of Mechanical and Electrical Engineering, Beijing University of Chemical Technology, Beijing 100029, China摘 要:<正>By simulating edge dislocation emissions from a mode I crack tip along multiple inclined slip planes, the plastic zone and dislocation......
Fatigue crack initiation for Al-Zn-Mg alloy welded jointLiang ZHANG 1), Xuesong LIU 1), Linsen WANG 2), Ping WANG 1) and Hongyuan FANG 1) (1) State Key Laboratory of Advanced Welding and Joining... fatigue crack initiation characteristics of Al-Zn-Mg alloy welded joint, notched specimens were used in fatigue test for the base metal, welding bead and heat affected zone (HAZ). The fatigue fracture......
Effect of three dimensional stress state on unstable fracture condition and crack opening level in a new crack growth modelFang WANG and Weicheng CUI China Ship Scientific Research Center,Wuxi 214082,China摘 要:A new model for the analysis of fatigue crack growth in the metal structures was proposed.This model shows a promising capability of explaining......
The Crack of Harden Cement Paste Observed with Multi-technique沈卫国摘 要:The shrinkage of the cement paste with low water-cement ratio at different relative humidity was observed and analyzed with ESEM and deformation map technique.The crack morphology was observed with different magnification with SEM and FESEM,and the formation of the crack was observed......
J. Cent. South Univ. (2020) 27: 242-255 DOI: https://doi.org/10.1007/s11771-020-4292-3 Finite element analysis of road structure containing top-down crack within asphalt concrete layer Pirmohammad... of Springer Nature 2020 Abstract: In this paper, a four-layered road structure containing a top-down crack is investigated by performing finite element analyses in ABAQUS. In this study, in addition......
J. Cent. South Univ. Technol. (2009) 16: 0444-0450 DOI: 10.1007/s11771-009-0075-6 Feasibility analysis for monitoring fatigue crack in hydraulic turbine blades using acoustic emission technique... in turbine blades using acoustic emission (AE) technique, the AE characteristics of fatigue crack growth were studied in the laboratory. And the characteristics were compared with those of background noise......
Acoustic Emission Monitoring the Fatigue Crack Growth in SM50B-Zc Steel朱祖铭,王中光,蓬钧摘 要:<正> The acoustic emission(AE)characteristicsfrom the fatigue crack propagation in SM50B-Zcsteel were strongly affected by the environment me-dium.The AE feature from the fatigue process bothin air and in 3.5% NaCl aqueous solution mani-fested a periodicity which......
Fatigue Crack Propagation in Plain Carbon Dual-phase Steel雷廷权,林广湧摘 要:<正> The effect of volume fraction VM and carboncontent(%C)M of martensite was studied on the fa-tigue crack propagation behaviour of plain carbonmartensite plus ferrite M+F dual-phase steel.Theexperimental results show that the △Kthdecreasesand da/dn increases with increasing VM......
A Method of Observing Fatigue Crack Growth by SEM穆恩生,林吉忠,吴玉树,胡玉祥,成兆银摘 要:<正> This paper introduces a modified control cir-cuit of static tensile stage of Cambridge S-200SEM.The function of the stage is extended to thatof a tensile/compressive dynamic fatigue testingstage.It can be used for studying fatigue microcharacteristic and crack......
As-extruded AZ31B Magnesium Alloy Fatigue Crack Propagation Behavior张红霞,王文先College of Material Science and Engineering,Taiyuan University of Technology摘 要:The fatigue crack propagation rate of as-extruded AZ31B magnesium alloy was studied. Compact tension [C(T)] of the notch direction parallel (T-L), vertical (L-T), and inclined at 45o to the extrusion......