Theoretical and Applied Fracture Mechanics
Papers 3,012
1 page of 302 pages (3,012 results)
#1Xiaoshan Shi (CUMT: China University of Mining and Technology)
#2Yixin Zhao (CUMT: China University of Mining and Technology)H-Index: 69
Last. Wei Yao (University of Toronto)H-Index: 12
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Abstract null null The mechanical and fracture behavior of rocks are mainly determined by the discontinuous defects inside the rock and the external force state. The focus of this research is to clarify the co-effects of bedding planes and loading conditions on the fracture behavior of anisotropic rocks. Notched semi-circular bend (NSCB) tests are performed on anisotropic rocks with varied bedding angles (from 0° to 90°) and loading conditions (from static loading to impact loading). By analyzin...
Abstract null null Many skeletons (“tests”) of the fossil echinoid Micraster from the marl limestone strata of the Upper Cretaceous formation of western Navarra (Spain) show small triangular holes on their surface, caused by the loss of a pyramidal fragment. The base of the pyramidal borings is often close to an equilateral triangle. The test of echinoids is a mosaic structure constituted of interlocking monocrystalline plates of bio-calcite which possess a preferred crystalline orientation. In ...
Abstract null null This research aimed to study the effects of a certain volume of fiber on the fracture characteristics of ultra-high-performance geopolymer concrete (UHPGC) based on the ground granulated blast furnace slag and silica fume. To this end, seven mixtures were selected and three different volume fractions were used in them. Three mixtures were used to study the effect of steel fiber (SF) volume fraction and the other three mixtures were used to assess the effect of replacing 0.25% ...
#1Tao Zhou (SZU: Shenzhen University)H-Index: 15
#2Zhenyu Han (SEU: Southeast University)H-Index: 7
Last. Jiarong Chen (SZU: Shenzhen University)
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Abstract null null In nature, rock masses, particularly underground rock structures, are subjected not only to static stress but also to frequent dynamic disturbances. In this paper, dynamic tests were carried out on single flawed sandstone specimens using a split Hopkinson pressure bar (SHPB), aiming to investigate the mechanical and fracture behavior of fractured rocks subjected to coupled static-repetitive impact loading. The results show that the dynamic strength of the flawed specimens decr...
#1Olusegun Fatoba (University of Manchester)H-Index: 3
#2Robert Akid (University of Manchester)H-Index: 29
Abstract null null The initiation and propagation behaviour of cracks emanating from corrosion pits in a high strength low alloy steel is investigated by testing pre-pitted specimens in the high cycle fatigue regime in an air environment. This was complemented with finite element analysis of electrochemically generated pit profiles. Fatigue cracks were found to initiate from the mouth of pits due likely to strain localisation at this region. Crack initiation lifetime and fatigue endurance decrea...
#1Jinyin Ma (CSU: Central South University)H-Index: 1
#2Diyuan Li (CSU: Central South University)H-Index: 22
Last. Qianrong Wan (CSU: Central South University)H-Index: 1
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Abstract null null In order to reveal the dynamic disturbance effect on the Mode I fatigue fracture behavior of hard rock, a series of three-point bending and disturbance fracture tests were performed on diorite specimens. Based on the plastic deformation ratio, a nonlinear degree p was proposed to correct the fracture toughness in disturbance fracture tests. The value of nonlinearity degree p increased with increasing pre-static load levels. As the disturbance frequency increases from 10 Hz to ...
#1Yixin Zhao (CUMT: China University of Mining and Technology)H-Index: 69
#2Zhuang Sun (CUMT: China University of Mining and Technology)
Last. Honghua Song (CUMT: China University of Mining and Technology)
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Abstract null null Due to bedding planes and natural fractures, the mechanical behavior of coal under different loading modes is usually anisotropic. The anisotropy usually influences the strength and stability of coal and rock mass in engineering. In this research, we used the asymmetric semi-circular bend (ASCB) method to carry out fracture tests of coal specimens with various bedding angles (0°, 22.5°, 45°, 67.5°and 90°) between loading direction and bedding planes under mode II loading. The ...
#1Li-Zhu Jin (NJTech: Nanjing Tech University)H-Index: 1
#2Chang-Yu Zhou (NJTech: Nanjing Tech University)H-Index: 15
Last. Xiao-Hua He (NJTech: Nanjing Tech University)H-Index: 14
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Abstract null null Crack sizes, geometrical configurations of specimens and structures, as well as loading conditions have significant effect on in-plane and out-of-plane constraint effects. Safety assessment with constraint effects can effectively improve the accuracy. There are prominent discrepancies between compressive fracture and tensile fracture. Most of engineering structures are usually under biaxial loading conditions, so that the influence of biaxial compressive loading on fracture an...
#1Minjie Song (HUST: Huazhong University of Science and Technology)
#2Jiaming Liu (XMU: Xiamen University)
Last. Ruiqing Li (CSU: Central South University)
view all 9 authors...
Abstract null null This paper aims to study the effects of biomimetic laser shock peening (BLSP) on crack resistance ability of aluminum alloy aircraft skin. The extracted feature parameters obtained from cherry leaves obey normal distribution. Based on the extracted biomimetic parameters, a 3D finite element model (FEM) is developed to study the effects of BLSP treatment on the residual stress distribution, stress intensity factors and residual fatigue life of specimens. Results show that BLSP ...
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