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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Damage Evolution Characteristics of Steel-Fiber-Reinforced Cellular Concrete Based on Acoustic Emission by Hu Huang, Feihao Chen, Kelei Cao, Xiancai Zhang, Ruihang Li

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Research on influential factors of crack propagation depth of unsaturated residual soils under short-term variations in external air pressure by Xu-tang Xu, Wen-bin Jian, Ye-qing Cai, Xiang-long Chen

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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

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Numerical Analysis of the Transient Thermal Stress Intensity Factors in Cylinders Containing an External Circumferential Semi-Elliptical Crack by Majid Jamal-Omidi, Seyed Mehdi Nabavi, Mehrdad Aghanavehsi

Subjects: “…external semi-elliptical circumferential crack…”
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Small Surface Fatigue Crack Behaviors of Cr-Mo Steel AISI4137 by Seung-Hoon Nahm, Sang-Koo Jeon, Dong-Kyun Kim, Min-Soo Suh, Chang-Min Suh

Subjects: “…multiple small surface fatigue cracks…”
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Crack path predictions and experiments in plane structures considering anisotropic properties and material interfaces by P.O. Judt, A. Ricoeur

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Development of world oil refining in the context of the coronavirus pandemic by A. P. Solomonov

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Research on the Effect of Geometric Parameters on the Stress Concentration Factor of Multi-Planar KK-Joints and Carbon Fiber-Reinforced Polymer Wrapping Rehabilitation with Numeric... by Yuhao Shi, Peng Deng, Shiqi Zhao, Yan Liu, Zhongyi Zhu, Yunkai Chen

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High temperature effects on fatigue performance and crack initiation mechanisms of 316LN stainless steel for nuclear power pipelines by JianNeng Zheng, JunChao Hu, YueHui Jiang, QingYuan Wang, Kun Yang

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Dolgu Barajlarda Çekme Çatlaklarının Duvarına Etkiyen Gerilmelerin Fiziksel Olarak Modellenmesi by Hasan Tosun, Sadettin Topçu

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Using a cohesive zone modeling to predict the compressive and tensile behavior on the failure load of single lap bonded joint by Benamar Badr, Mokhtari Mohamed, Madani Kouider, Benzaama Habib

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Specific Features of Heatand Mass Transfer Processes in Road Dressings by B. M. Khroustalev, Tingguo Liu, V. D. Akeliev, Yu. H. Aliakseyeu, Jicun Shi, V. V. Zankovich

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A numerical method for the solution of plane crack problems in finite media by P. S. Theocaris, N. Ioakimidis

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Microstructural insights into the influence of stress amplitudes on the crack nucleation mechanism of Ti–2Al-2.5Zr alloy using quasi in-situ tests by Shengkun Wang, Mengqi Li, Zuoliang Ning, Gang Chen, Zheng Liu, Jun Wu, Wenchun Jiang

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COMPARATIVE RESEARCHES OF FRACTURES OF HIGH-STRENGTH CAST IRON IN THE AS-CAST AND DEFORMED STATE by A. I. Pokrovsky, I. N. Khrol

Subjects: “…the results of comparative studies of fracture surfaces of high-strength cast iron in the as-cast state and after hot direct extrusion through an aperture of a conical die are presented. the shape change of graphite inclusions and components of the metal matrix is examined with increasing the reduction ratio from 0 (as-cast state) to 80%. for the fist time, using the electrochemical etching of the metal matrix of the cast iron, it is demonstrated experimentally that at plastic deformation the ductile flow of graphite inclusions occurs without fracturing of the latter. the surface morphology of a deformed graphite inclusion is revealed. it is shown that inside the inclusion the strain is distributed non-uniformly: the peripheral zones are deformed to a larger extent while the central part may retain its original radial structure. the fact that the most part of graphite inclusions on the fracture surface of the deformed cast iron appeared undamaged (very small amount of fractured inclusions was observed) testifies against the common opinion that graphite acts as a crack nucleation site. a hypothesis is put forward that the crack nucleates in the metal matrix, presumably at the pearlite/ferrite interface, and propagates from one graphite inclusion to another rounding but not damaging the latter.…”
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