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Simulation of blast induced crater in jointed rock mass by discontinuous deformation analysis method

Youjun NING, Xinmei AN, Jun YANG, Guowei MA,

Frontiers of Structural and Civil Engineering 2010, Volume 4, Issue 2,   Pages 223-232 doi: 10.1007/s11709-010-0022-5

Abstract: This paper adopts the discontinuous deformation analysis (DDA) method to simulate the rock blasting processA dynamic parameter adjustment and the non-reflecting boundary condition are implemented in the DDA methodThe sub-block DDA method to simulate fracture problems is used.

Keywords： blast crater     jointed rock mass     explosion gas pressure     discontinuous deformation analysis (DDA) method    

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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 (CDDA) method is proposed in this paper for modeling of crack problems.CDDA is particularly suitable for modeling the fracture propagation because the switch from continuous deformationanalysis to discontinuous deformation analysis is natural and convenient without additional procedures

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

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Calculation method of radial stress and deformation on conic threaded connections with interference fit

Shoujun CHEN, Qiang LI, Qi AN,

Frontiers of Mechanical Engineering 2010, Volume 5, Issue 3,   Pages 302-307 doi: 10.1007/s11465-010-0018-9

Abstract: This paper presents a calculation method for radial stress distribution and deformation on conic threadedin this paper is reasonable, and the finite element analysis (FEA) method is used to validate the proposedmethod.The results obtained by the proposed method and FEA method are identical.The model offers a new way of calculating the radial stress and deformation on conic thread connections

Keywords： conic threaded connections     interference fit     radial stress     deformation     finite element analysis (FEA)    

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Discontinuous mechanical behaviors of existing shield tunnel with stiffness reduction at longitudinal

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 1,   Pages 37-52 doi: 10.1007/s11709-022-0920-3

Abstract: An analytical model is proposed to estimate the discontinuous mechanical behavior of an existing shieldCompared with other approaches, our method yields results that are consistent with centrifugation testThe results indicate that our proposed method is suitable for simulating the discontinuous mechanicalThe deformation and internal forces decrease as α, β, and GA increase.The bending moment and shear force are discontinuous despite slight discontinuities in the deflection

Keywords： tunnel–soil interaction     discontinuous analysis     longitudinal joints     existing shield tunnel     Timoshenko    

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Rotation errors in numerical manifold method and a correction based on large deformation theory

Ning ZHANG, Xu LI, Qinghui JIANG, Xingchao LIN

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 5,   Pages 1036-1053 doi: 10.1007/s11709-019-0535-5

Abstract: Numerical manifold method (NMM) is an effective method for simulating block system, however, significantThe first two kind errors are owing to the small deformation assumption and the last one is due to theA large deformation NMM is proposed based on large deformation theory.In this method, the governing equation is derived using Green strain, the large deformation iterationresults prove that all three kinds of errors are eliminated in this method.

Keywords： numerical manifold method     rotation     large deformation     Green strain     open-close iteration    

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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: In this paper, the stability calculation and deformation analysis of excavation slope under differentconditions are made, using the limit equilibrium method and the finite element method.Reinforcement was applied in the slope, by method of composite soil nail wall and bored piles+entry cupportingThe 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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Dynamic analysis of composite beam subjected to harmonic moving load based on the third-order shear deformation

Mohammad Javad REZVANIL, Mohammad Hossein KARGARNOVIN, Davood YOUNESIAN

Frontiers of Mechanical Engineering 2011, Volume 6, Issue 4,   Pages 409-418 doi: 10.1007/s11465-011-0245-8

Abstract: response of an infinite Timoshenko beam subjected to a harmonic moving load based on the third-order shear deformationIn order to demonstrate the accuracy of the present method, the results TSDT are compared with the previouslyobtained results based on first-order shear deformation theory, with which good agreements are observed

Keywords： timoshenko composite beam     pasternak viscoelastic foundation     third-order shear deformation theory (TSDT    

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Deformation field and crack analyses of concrete using digital image correlation method

Yijie HUANG, Xujia HE, Qing WANG, Jianzhuang XIAO

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 5,   Pages 1183-1199 doi: 10.1007/s11709-019-0545-3

Abstract: The study on the deformation distribution and crack propagation of concrete under axial compression wasconducted by the digital image correlation (DIC) method.The novel analysis process and numerical program for DIC method were established.Test results also showed that the transverse and shear deformation concentration areas (DCAs) were formed

Keywords： deformation filed distribution     crack development     digital image correlation method     mechanical properties     water-cement ratio     characteristics of deformation and crack    

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Bending and vibration of a discontinuous beam with a curvic coupling under different axial forces

Heng LIU, Jie HONG, Dayi ZHANG

Frontiers of Mechanical Engineering 2020, Volume 15, Issue 3,   Pages 417-429 doi: 10.1007/s11465-019-0584-4

Abstract: The transverse stiffness and vibration characteristics of discontinuous beams can significantly differthis study, the equations for the deflection curve and vibration frequencies of a simply supported discontinuousbeam under axial loads are derived analytically on the basis of boundary, continuity, and deformationmoments of inertia, shearing effects, and gyroscopic moments are investigated using the transfer matrix methodThe deflection and vibration frequencies of the discontinuous beam are studied under different axial

Keywords： discontinuous beam     bending stiffness     transverse vibration     axial loads     gyroscopic moments    

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Erratum to: Bending and vibration of a discontinuous beam with a curvic coupling under different axial

Frontiers of Mechanical Engineering 2022, Volume 17, Issue 2, doi: 10.1007/s11465-022-0709-z

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Free vibration analysis of laminated FG-CNT reinforced composite beams using finite element method

T. VO-DUY, V. HO-HUU, T. NGUYEN-THOI

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 2,   Pages 324-336 doi: 10.1007/s11709-018-0466-6

Abstract: The first-order shear deformation theory is used to formulate a governing equation for predicting freeThe governing equation is solved by the finite element method with various boundary conditions.

Keywords： free vibration analysis     laminated FG-CNTRC beam     finite element method     first-order shear deformation theory    

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Deformation characteristics of corrugated composites for morphing wings

Ruijun GE, Bangfeng WANG, Changwei MOU, Yong ZHOU,

Frontiers of Mechanical Engineering 2010, Volume 5, Issue 1,   Pages 73-78 doi: 10.1007/s11465-009-0063-4

Abstract: The linear cumulative effect of corrugated composites deformation is proved by calculating the elongationSeveral corrugated composite specimens were manufactured and tested to verify the results of numerical analysisand experiments show that the corrugated composite provided in this paper can afford obviously larger deformation

Keywords： corrugated composites     deformation characteristic     numerical analysis     experiment    

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Deformation Rate Ratio Criterion (DRRC) and Its Verification in Maoshan Tunnel Excavation

Li Shihui,Song Jun

Strategic Study of CAE 2002, Volume 4, Issue 6,   Pages 85-91

Abstract: Advance the basis for the hypothesis of deformation rate ratio criterion (DRRC) and the method for obtainingObtain the method of DRRC for constituting a typical information method, which is characterized by theDRRC is a kind of hypothetico-deductive method, and it is also a preliminary application of metasynthesis

Keywords： open complex giant system     cave-in accident     deformation rate ratio criterion     typical information method     hypothetico-deductive method     metasynthesis    

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Deformation analysis of shape memory polymer for morphing wing skin under airflow

Weilong YIN, Jingcang LIU, Jinsong LENG,

Frontiers of Mechanical Engineering 2009, Volume 4, Issue 4,   Pages 447-449 doi: 10.1007/s11465-009-0062-5

Abstract: The method for analyzing the out-of-plane deformation of a flexible skin under airflow is developed inThe aerodynamic analysis is performed using the CFD software, and the structural analysis is performedusing finite element method.The chief aim of the present study is to investigate the out-of-plane deformation of the shape memory

Keywords： aircraft     morphing     skin     shape memory polymer (SMP)     deformation     pre-strain    

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Effect of end-to-end invagination pancreaticojejunostomy with circle discontinuous U suture in pancreatic

ZHANG Xuewen, XUAN Wei, JIANG Tao, JI Degang, YANG Yongsheng, ZHANG Dan, XIE Yingjun, MENG Zihui, ZHAO Jisheng

Frontiers of Medicine 2007, Volume 1, Issue 1,   Pages 46-48 doi: 10.1007/s11684-007-0009-3

Abstract: pancreaticojejunostomy in the pancreatic operation and to study the safety and feasibility of a new operative methodcalled end-to-end invagination pancreaticojejunostomy with circle discontinuous U suture to preventNo pancreatic fistula occurred in end-to-end invagination pancreaticojejunostomy with circle discontinuousEnd-to-end invagination pancreaticojejunostomy with circle discontinuous U suture has a definite effectBut the cases were limited, so this method would still need to be observed and confirmed further in the
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Title Author Date Type Operation

Simulation of blast induced crater in jointed rock mass by discontinuous deformation analysis method

Youjun NING, Xinmei AN, Jun YANG, Guowei MA,

Journal Article

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

Yongchang CAI, Hehua ZHU, Xiaoying ZHUANG

Journal Article

Calculation method of radial stress and deformation on conic threaded connections with interference fit

Shoujun CHEN, Qiang LI, Qi AN,

Journal Article

Discontinuous mechanical behaviors of existing shield tunnel with stiffness reduction at longitudinal

Journal Article

Rotation errors in numerical manifold method and a correction based on large deformation theory

Ning ZHANG, Xu LI, Qinghui JIANG, Xingchao LIN

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

Dynamic analysis of composite beam subjected to harmonic moving load based on the third-order shear deformation

Mohammad Javad REZVANIL, Mohammad Hossein KARGARNOVIN, Davood YOUNESIAN

Journal Article

Deformation field and crack analyses of concrete using digital image correlation method

Yijie HUANG, Xujia HE, Qing WANG, Jianzhuang XIAO

Journal Article

Bending and vibration of a discontinuous beam with a curvic coupling under different axial forces

Heng LIU, Jie HONG, Dayi ZHANG

Journal Article

Erratum to: Bending and vibration of a discontinuous beam with a curvic coupling under different axial

Journal Article

Free vibration analysis of laminated FG-CNT reinforced composite beams using finite element method

T. VO-DUY, V. HO-HUU, T. NGUYEN-THOI

Journal Article

Deformation characteristics of corrugated composites for morphing wings

Ruijun GE, Bangfeng WANG, Changwei MOU, Yong ZHOU,

Journal Article

Deformation Rate Ratio Criterion (DRRC) and Its Verification in Maoshan Tunnel Excavation

Li Shihui,Song Jun

Journal Article

Deformation analysis of shape memory polymer for morphing wing skin under airflow

Weilong YIN, Jingcang LIU, Jinsong LENG,

Journal Article

Effect of end-to-end invagination pancreaticojejunostomy with circle discontinuous U suture in pancreatic

ZHANG Xuewen, XUAN Wei, JIANG Tao, JI Degang, YANG Yongsheng, ZHANG Dan, XIE Yingjun, MENG Zihui, ZHAO Jisheng

Journal Article