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A continuous/discontinuous deformation analysis (CDDA) method based on deformable blocks for fracture

Yongchang CAI, Hehua ZHU, Xiaoying ZHUANG

Frontiers of Structural and Civil Engineering 2013, Volume 7, Issue 4,   Pages 369-378 doi: 10.1007/s11709-013-0222-x

Abstract: In the framework of finite element meshes, a novel continuous/discontinuous deformation analysis (CDDAThe CDDA is particularly suitable for modeling the fracture propagation because the switch from continuousdeformation analysis to discontinuous deformation analysis is natural and convenient without additional

Keywords： fracture     crack     propagation     deformable block     continuous/discontinuous deformation analysis (CDDA)    

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Research on Direction and Location for Danger Prediction of Coal or Rock Dynamic Disaster

Xiao Hohgfei,He Xueqiu,Feng Tao,Wang Enyuan

Strategic Study of CAE 2005, Volume 7, Issue 11,   Pages 81-86

Abstract: use the non-touch electromagnetic emission (EME) method to better forecast or predict the danger of coalor rock dynamic disaster such as coal or gas outburst, rock or coal outburst and so on, the directionexcavation, the monitoring antenna should be laid at the middle height of tunnel and faced with the coalthat it is feasible to study the direction and location of dangerous areas in predicting the danger of coal

Keywords： rock or coal dynamic disaster     danger prediction     direction and location     deformation and fracture of coal    

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Measurement of dynamic fracture toughness and failure behavior for explosive mock materials

Pengwan CHEN, Zhongbin ZHOU, Shaopeng MA, Qinwei MA, Fenglei HUANG

Frontiers of Mechanical Engineering 2011, Volume 6, Issue 3,   Pages 292-295 doi: 10.1007/s11465-011-0237-8

Abstract: A high-speed camera was used to capture the deformation and fracture process of the specimen in situ.Results show that the method of combined DIC and SHPB is effective to study the dynamic deformation andfracture behavior of explosive simulants.The fracture toughness of the specimen was preliminary measured.

Keywords： correlation     polymer bonded explosive simulant     split Hopkinson pressure bar (SHPB)     semicircular bending test     deformation     fracture toughness    

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A toughness based deformation limit for X- and K-joints under brace axial tension

Bo GU,Xudong QIAN,Aziz AHMED

Frontiers of Structural and Civil Engineering 2016, Volume 10, Issue 3,   Pages 345-362 doi: 10.1007/s11709-016-0333-2

Abstract: This study reports a deformation limit for the initiation of ductile fracture failure in fatigue-crackedfatigue crack at the hot-spot location in the tubular joint reaches the material fracture toughnessmeasured from standard fracture specimens.demonstrates the conservative nature of the proposed deformation limit.deformation limits for intact X- and K-joints under brace axial loads.

Keywords： circular hollow section (CHS)     tubular joint     fracture failure     deformation limit     J-integral    

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Basic problems for dynamic deformation and fracture of deep rock mass

Li Jie,Wang Mingyang,Zhang Ning,Fan Pengxian

Strategic Study of CAE 2013, Volume 15, Issue 5,   Pages 71-79

Abstract: The difficulty lies in how to describe the rock mass properties in large dynamic deformation and failureresults for failure mechanism of deep rock mass, basic problems in dynamic damage process(time effect, fractureTo study on the deformation and failure mechanism of deep rock mass, the concept of time and space mustTo reveal the real deformation and failure process at present, we must continue to study within the frameworkcharacteristics of plastic flow and failure process, and reasonable means must be adopted to describe the fracture

Keywords： deep rock mass     dynamic fracture     time effect     damage fracture     rock burst     zonal disintegration    

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Technology of Coal-Rock Mass Hydraulic Fracture Weakeningand Its Development

Huang Bingxiang,Deng Guangzhe,Liu Changyou

Strategic Study of CAE 2007, Volume 9, Issue 4,   Pages 83-88

Abstract:

Technologic problems of top coal recovery ratio, rock burst, coal spontaneouscombustion and gas accumulation induced by hard top-coal or roof's fall in coal mining were introducedCurrent research and development trend of hydraulic fracture weakening for hard top-coal or roof wasanalyzed, including the law of crack expanding induced by hydraulic fracture in rock mass, mescoscopic

Keywords： hard top-coal(roof)     hydraulic fracture     crack expanding     mescoscopic structure    

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Horizontal effects in fracturing operation of coal bed methane in Qinshui,Shanxi Province

Li Mengxi,Zhang Cong

Strategic Study of CAE 2012, Volume 14, Issue 4,   Pages 16-19

Abstract:

This paper describes horizontal effects of CBM (coal bed methane)fracturing

Keywords： coal bed methane     fracture     hydraulic fracturing    

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Study on Coal Seam Roof Gas Drainage from the Strike of Annular Fracture Areas by the Long Drill Method

Liu Zegong,Yuan Liang,Dai Guanglong,Shi Biming,Lu Ping,Tu Min

Strategic Study of CAE 2004, Volume 6, Issue 5,   Pages 32-38

Abstract:

Gas in working faces is mainly produced in the destressing and desorption process of the coal bed,The coal beds are too soft to carry out bedding drilling and draw gas effectively.aisles of the full development areas and gather in annular fracture areas.Mining in coal beds with gas of high conentration and low permeability and gas suction can be operatodupper corners, so the technically drilling problem in soft coal beds with low permeability and high

Keywords： coal seam     similar material experiment     numerical simulation     gas drainage     annular fracture area    

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Stability and deformation analysis of high slope for tank type of bunker at Donglutian coal mine

Jiang Haibo,Gong Shoucai,Liu Qingxue

Strategic Study of CAE 2012, Volume 14, Issue 2,   Pages 107-112

Abstract:

The tank-type bunker is the largest coal bunker in Asia currently.In this paper, the stability calculation and deformation analysis of excavation slope under differentThe stability and deformation are satisfied with operational requirement, and the layout of reinforcement

Keywords： tank type of bunker     slope     limit equilibrium method     finite element method (FEM)     stability     deformation    

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Research progress of the cause for orange peel of aluminum alloy sheet during tensile deformation

Ma Mingtu,Yang Hongya,Wu Emei and Jin Qingsheng

Strategic Study of CAE 2014, Volume 16, Issue 1,   Pages 4-13

Abstract:

Research progresses of forming causes for orange peel during the tensile deformation of aluminum alloyorange peel，sliding zone，roughness of surface，tensile fracture morphology and nano hardness measurementto the texture and grain orientation caused in tensile deformation.The texture generating is closely related to inhomogeneity deformation of grain.，resulting in surface orange peel forming after tensile deformation.

Keywords： orange peel forming     mechanical property     tension fracture     nano hardness     EBSD     X-ray    

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Tests on impact effect of partial fracture at steel frame connections

CHEN Yiyi, BIAN Ruoning

Frontiers of Structural and Civil Engineering 2008, Volume 2, Issue 4,   Pages 295-301 doi: 10.1007/s11709-008-0049-z

Abstract: Impact effect of sudden fracture at steel frame connections under severe earthquake or other extremeThe relation of impulse caused by structural fracture to the release of inner force at the cracked locationIt is also revealed that the instant fracture of structural connection is characterized by progressiveand partial fracture.Numerical evaluation of the impact effect of connection fracture is carried out.

Keywords： structural fracture     natural     fracture     progressive     high-frequency    

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Effect of fly ash replacement level on the fracture behavior of concrete

Mahdi AREZOUMANDI, Jeffery S. VOLZ

Frontiers of Structural and Civil Engineering 2013, Volume 7, Issue 4,   Pages 411-418 doi: 10.1007/s11709-013-0228-4

Abstract: results of an experimental investigation that evaluates effect of fly ash replacement level on the fractureThis experimental program consisted of 32 fracture beams to study the fracture behavior of concrete.The experimental fracture energies were compared with the fracture energy provisions of different designevaluate whether or not there is any statistically significant difference between the experimental fracturethese statistical tests show that the mix with higher level of fly ash replacement level has higher fracture

Keywords： concrete     fracture energy     fly ash    

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Resistance of large deformation of the Wushaoling Tunnel F7 soft fault

ZHAO Xufeng, CHEN Haiming, WANG Chunmiao

Frontiers of Structural and Civil Engineering 2007, Volume 1, Issue 1,   Pages 123-127 doi: 10.1007/s11709-007-0013-3

Abstract: The measurements and techniques are proposed to resist the deformation.

Keywords： F7     deformation     appropriate     construction     mechanical    

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Computational modeling of fracture in concrete: A review

Luthfi Muhammad Mauludin, Chahmi Oucif

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 3,   Pages 586-598 doi: 10.1007/s11709-020-0573-z

Abstract: This paper presents a review of fracture modeling of concrete.Based on comprehensive literature review, there are two main approaches considered to-date of concrete fractureThe purpose of this review is to provide insight comparison from different techniques in modeling of fractureIn the first section, an overview of fracture modeling in general is highlighted.

Keywords： concrete fracture     macroscopic     micromechanical     heterogeneity    

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Numerical modeling of nonlinear deformation of polymer composites based on hyperelastic constitutive

Qingsheng YANG, Fang XU

Frontiers of Mechanical Engineering 2009, Volume 4, Issue 3,   Pages 284-288 doi: 10.1007/s11465-009-0067-0

Abstract: reinforced polymer (FRP) composites exhibit nonlinear and hyperelastic characteristics under finite deformationhyperelastic behavior of fiber reinforced polymer composites using a micromechanical model and finite deformationThe local stress and deformation of a representative volume element are calculated by the nonlinear finiteNumerical examples are given to demonstrate hyperelastic behavior and deformation of the composites,

Keywords： composites     hyperelastic     finite deformation     homogenization     micromechanics    

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Title Author Date Type Operation

A continuous/discontinuous deformation analysis (CDDA) method based on deformable blocks for fracture

Yongchang CAI, Hehua ZHU, Xiaoying ZHUANG

Journal Article

Research on Direction and Location for Danger Prediction of Coal or Rock Dynamic Disaster

Xiao Hohgfei,He Xueqiu,Feng Tao,Wang Enyuan

Journal Article

Measurement of dynamic fracture toughness and failure behavior for explosive mock materials

Pengwan CHEN, Zhongbin ZHOU, Shaopeng MA, Qinwei MA, Fenglei HUANG

Journal Article

A toughness based deformation limit for X- and K-joints under brace axial tension

Bo GU,Xudong QIAN,Aziz AHMED

Journal Article

Basic problems for dynamic deformation and fracture of deep rock mass

Li Jie,Wang Mingyang,Zhang Ning,Fan Pengxian

Journal Article

Technology of Coal-Rock Mass Hydraulic Fracture Weakeningand Its Development

Huang Bingxiang,Deng Guangzhe,Liu Changyou

Journal Article

Horizontal effects in fracturing operation of coal bed methane in Qinshui,Shanxi Province

Li Mengxi,Zhang Cong

Journal Article

Study on Coal Seam Roof Gas Drainage from the Strike of Annular Fracture Areas by the Long Drill Method

Liu Zegong,Yuan Liang,Dai Guanglong,Shi Biming,Lu Ping,Tu Min

Journal Article

Stability and deformation analysis of high slope for tank type of bunker at Donglutian coal mine

Jiang Haibo,Gong Shoucai,Liu Qingxue

Journal Article

Research progress of the cause for orange peel of aluminum alloy sheet during tensile deformation

Ma Mingtu,Yang Hongya,Wu Emei and Jin Qingsheng

Journal Article

Tests on impact effect of partial fracture at steel frame connections

CHEN Yiyi, BIAN Ruoning

Journal Article

Effect of fly ash replacement level on the fracture behavior of concrete

Mahdi AREZOUMANDI, Jeffery S. VOLZ

Journal Article

Resistance of large deformation of the Wushaoling Tunnel F7 soft fault

ZHAO Xufeng, CHEN Haiming, WANG Chunmiao

Journal Article

Computational modeling of fracture in concrete: A review

Luthfi Muhammad Mauludin, Chahmi Oucif

Journal Article

Numerical modeling of nonlinear deformation of polymer composites based on hyperelastic constitutive

Qingsheng YANG, Fang XU

Journal Article