THE INTRINSIC FATIGUE THRESHOLD OF 25CR2NI2MOV STEEL by SHEN XueCheng, DU YanNan, ZHU MingLiang, HUANG YuHui, XUAN FuZhen

“…Fatigue crack growth tests of 25 Cr2 Ni2 MoV steel with two different heat treatments（550℃× 20 h,580℃× 20 h） were conducted at stress ratios R of 0.1,0.3,0.5 and 0.7,and the fatigue threshold,△K_th,and microscopic mechanism were investigated.Results showed that △K_th increased with the decrease of R,and the heat treatment had varied effects on △K_thunder lower R,while it had less effect under higher R.Fracture morphology observation showed that there existed a large number of facet morphology under lower R,while the facet morphology was gradually reduced with the increase of R.Additionally,the percentage of facet morphology followed a parabolic pattern with △K.It is indicated that R and heat treatment are important influencing factors on △K_th.The crack growth at higher R has weak effect of crack closure,representing the fatigue resistance of the material,and thus can be regarded as the intrinsic property of the material which can be estimated by the proposed model.…”
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Specimen thickness effect on elastic-plastic constraint parameter A by G.P. Nikishkov, Yu.G. Matvienko

“…Distributions of the J-integral and constraint parameter A along the crack front for varying specimen thickness and crack depth are determined for edge cracked plate, center cracked plate, three point bend and compact tension specimens. …”
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Evolution law of overlying rock fracture field in goaf mining with double-roof-cutting retaining roadway by Xiaobo Lv, Shengyong Hu, Jun Nian, Chunsheng Deng, Bo Zhao, Cheng He, Yansheng Wang, Xitu Zhang, Wei Zhang

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Clinical observation of external application of compound Baiyu powder in treating cracked nipples during lactation period and related nursing management (复方白玉散外敷治疗哺乳期乳头皲裂临床疗效观察及护理)... by CHEN Shuangshuang (陈双双), WANG Yuan (王媛), YOU Tingli (游婷李), CHEN Juan (陈娟)

“…Objective To investigate the effect of external application of Traditional Chinese Medicine compound Baiyu powder in treating cracked nipples during lactation period, and summarized related nursing measures during treatment. …”
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Effect of High Percentages of Coated Recycled Aggregates on the Flexural Behavior of Reinforced Concrete Beams by Catalina Martínez, Viviana Letelier, Bruno Wenzel

“…Finally, the experimental critical deflection was higher than that calculated by the code equations. …”
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A review of five years’ experience on the effect of fibers on the autogenous healing of Ultra High-Performance Fiber-Reinforced Concrete by M. Roig-Flores, H. Doostkami, P. Serna

“…The mix with higher fiber content (U160) obtained superior crack closure and healing efficiency, particularly under water immersion. …”
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Characteristics of Microstructure and Fracture Toughness According to the Groove Shape of Submerged Arc Welding by Yong-Taek Shin, Chang-Ju Jung, Seong-Han Bae, Gyubaek An, Myungrak Son, Young-Il Park

“…Microstructural analysis focused on acicular ferrite, grain boundary ferrite, and MA (Martensite–Austenite) constituents to assess their influence on CTOD (Crack Tip Opening Displacement). The results indicate that the K-groove achieved a higher CTOD value of 0.82 mm compared to 0.13 mm for the X-groove, attributed to differences in microstructural composition and cooling rates. …”
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Crankshaft high cycle bending fatigue test method based on the combined extended Kalman filtering algorithm and different failure criterion parameters. by Zhang Wei, Yan Ruidong, Songsong Sun, Gong Xiaolin, Liu Zhentao

“…In this paper, an accelerated bending fatigue test method for the crankshaft was proposed based on the combination of the extended Kalman filtering algorithm method (EKF) and different failure criterion parameters. …”
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Comparative analysis of counter-current and co-current downer reactors using particle image velocimetry and computational particle-fluid dynamics by Talal A. Aldugman, Mengmeng Cui, Abdulrahman Alzailaie, Abdullah Alhareth, Kenneth Langley, Lujain Alfilfil, Khalid Almajnouni, Jorge Gascon, Sigurdur Thoroddsen, Pedro Castaño

“…Pilot-scale experiments were conducted for fluid catalytic cracking (FCC) catalysts and sand, which verified the system stability and provided the validation basis for the simulation strategy. …”
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Influence of climate and external plaster on the humidity conditions of masonry walls by R. A. Gorshkov, S. V. Kornienko

“…For the conditions of the coldest five-day period, the actual partial pressure of water vapour already at a distance of 135 mm from the inner surface exceeds the maximum partial pressure, which indicates a high risk of moisture condensation, and this risk is the higher the less vapour permeable the plaster covering is.Conclusions. …”
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Construction of water injection seepage model for coal body and microscopic dominant influence law by Enmao WANG, Gang WANG, Shuliang XIE, Hongzhao WEI, Jing FENG, Handan LIANG

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Tailing and axisymmetric static laser beam shapes to steer microstructure and improve mechanical properties of autogenously laser welded AA6082 alloy by Venkat Vivek Pamarthi, Tianzhu Sun, Abhishek Das, Qamar Hayat, Alexander Griffiths, Lewis Johnson, Pasquale Franciosa

“…The findings indicate that introducing a 580 µm ring to the core beam reduces crack formation by lowering thermal gradients; however, increasing the power of the ring beam at a constant diameter, coarsens the microstructure, producing axial columnar grains with higher crack sensitivity. …”
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Application of FDA Discriminant Analysis Methodin Classification of Tunnel Surrounding Rocks by CHEN Liang, HAN Aiguo, CHEN Qiang, REN Guangming

“…Aiming at the classification of tunnel surrounding rock, and taking the surrounding rock of a water conveyance tunnel in southwest China as the research object, this paper comprehensively selects 8 indicators such as uniaxial saturated compressive strength of rock, volume joint count, rock mass integrity coefficient, main structural surface occurrence, rock quality, strength-stress ratio, crack weathering.and joint set in hydropower surrounding rock classification and Q system classification as the discriminant factors to establish the corresponding Fisher discriminant model, tests the modeling data one by one by the back-substitution estimation method, with the consistency rate of 89.5%, and applies the discriminant model to the remaining sections of the tunnel to obtain the prediction results, which are consistent with the actual situation. …”
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Identification Procedures as Tools for Fault Diagnosis of Rotating Machinery by Susanne Seibold, Claus-Peter Fritzen

“…First, it is shown that the crack depth of a simulated Jeffcott-rotor can be calculated correctly. …”
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Monitoring and analysis of reinforced concrete plate-column structures under room temperature and fire based on acoustic emission by Dongye Wang, Yuli Dong, Dashan Zhang, Weihua Wang, Xin Lu

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Mechanical and fractured surface characterization of epoxy/red mud/fly ash/aluminium powder filled hybrid composites for automotive applications by K. C. Anil, A. B. Hemavathi, A. Adeebpasha

“…This has called for researches into lighter material development of the same or even superior mechanical properties to the existing materials in this area of applications. …”
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Mechanical and Fractured surface characterization of epoxy/red mud/fly ash/ aluminium powder filled hybrid composites for automotive applications by K. C. Anil, A.B. Hemavathi, A. Adeebpasha

“…This has called for researches into lighter material development of the same or even superior mechanical properties to the existing materials in this area of applications. …”
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Fracture behavior of sandstone with partial filling flaw under mixed-mode loading: Three-point bending tests and discrete element method by Dongdong Ma, Yu Wu, Xiao Ma, Xunjian Hu, Wenbao Dong, Decheng Li, Lingyu Li

“…The fracture behavior of natural fracture in the geological reservoir subjected to filling property, affects the crack initiation and propagation under stress perturbation. …”
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Experimental Study on Shear Behavior and Acoustic Emission Characteristics of Nonpersistent Joints by Yujing Jiang, Yongqiang Chen, Xianzhen Cheng, Hengjie Luan, Sunhao Zhang, Qizheng Zhao, Wei Han

“…The peak shear stress gradually decreases with the increase of the crack length. The shear strength of the specimens with unilateral cracks is much higher than that of the specimens with bilateral cracks. …”
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Comparison of the Flexural Performance and Behaviour of Fly-Ash-Based Geopolymer Concrete Beams Reinforced with CFRP and GFRP Bars by Hemn Qader Ahmed, Dilshad Kakasor Jaf, Sinan Abdulkhaleq Yaseen

“…Beams with lower reinforcement ratios experienced a fewer number of crack and a higher value of crack width, while numerous cracks and less value of crack width were observed in beams with higher reinforcement ratio. …”
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