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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:

In this work, a pre-cracked semi-circular shaped explosive simulant was loaded using a split Hopkinson pressure bar (SHPB). A high-speed camera was used to capture the deformation and fracture process of the specimen in situ. The digital images were processed using the digital image correlation (DIC) method. Next, full displacement and strain fields were obtained. The displacement vector field shows that the specimen fractured under tensile stress action. The strain field can be used to predict the crack propagation. Results show that the method of combined DIC and SHPB is effective to study the dynamic deformation and fracture behavior of explosive simulants. In addition, the specimen was loaded using a drop weight. The fracture toughness of the specimen was preliminary measured.

Keywords： digital image correlation     polymer bonded explosive simulant     split Hopkinson pressure bar (SHPB)     semicircularbending test     deformation     fracture toughness    

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Bending failure performance of a shield tunnel segment based on full-scale test and numerical analysis

Frontiers of Structural and Civil Engineering   Pages 1033-1046 doi: 10.1007/s11709-023-0973-y

Abstract: This study focuses on the bending failure performance of a shield tunnel segment.A full-scale test was conducted to investigate deformation and failure characteristics.During the loading, the bending failure process can be divided into four stages: the elastic stage, workingA numerical model corresponding to the test was established using the elastoplastic damage constitutiveAfter a comparative analysis of the simulation and test results, parametric studies were performed to

Keywords： shield tunnel     bearing capacity     failure mechanism     segment reinforcement    

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Experimental and parametrical investigation of pre-stressed ultrahigh-performance fiber-reinforced concrete railway sleepers

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 3,   Pages 411-428 doi: 10.1007/s11709-023-0928-3

Abstract: Under European standards, 35 UHPFRC sleepers are subjected to static bending tests at the center and

Keywords： pre-stressed concrete sleeper     ultrahigh performance fiber-reinforced concrete     pull-out test     staticbending test     steel fiber     aspect ratio     volume fraction    

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Ductility improvement of GFRP-RC beams using precast confined concrete block in compression zone

Frontiers of Structural and Civil Engineering doi: 10.1007/s11709-023-0968-8

Abstract: A control beam and four beams with different PCCBs were cast and tested under four-point bending conditions

Keywords： ductility     four-point bending test     glass fiber-reinforced polymer     precast confined concrete block    

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A new meshless approach for bending analysis of thin plates with arbitrary shapes and boundary conditions

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 1,   Pages 75-85 doi: 10.1007/s11709-021-0798-5

Abstract: An efficient and meshfree approach is proposed for the bending analysis of thin plates.

Keywords： plate     bending     meshless method     collocation    

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Improved prediction of pile bending moment and deflection due to adjacent braced excavation

Frontiers of Structural and Civil Engineering doi: 10.1007/s11709-023-0961-2

Abstract: This study develops equations to predict the existing pile bending moment and deflection produced byIt is practically unfeasible to obtain measurement data; hence, artificial data for the bending momentThe estimation results of the developed equations can provide satisfactory pile bending moment and deflection

Keywords： pile responses     excavation     prediction     deflection     bending moments    

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3D fracture modelling and limit state analysis of prestressed composite concrete pipes

Pengfei HE, Yang SHEN, Yun GU, Pangyong SHEN

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 1,   Pages 165-175 doi: 10.1007/s11709-018-0484-4

Abstract: In this manuscript, we study fracture of prestressed cylindrical concrete pipes. Such concrete pipes play a major role in tunneling and underground engineering. The structure is modelled fully in 3D using three-dimensional continuum elements for the concrete structure which beam elements are employed to model the reinforcement. This allows the method to capture important phenomena compared to a pure shell model of concrete. A continuous approach to fracture is chosen when concrete is subjected to compressive loading while a combined continuous-discrete fracture method is employed in tension. The model is validated through comparisons with experimental data.

Keywords： limit state analysis     3D fracture modelling     prestressed composite pipes     reinforced concrete     three-point bendingtest    

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growth behavior of a 170 mm diameter stainless steel straight pipe subjected to combined torsion and bending

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 4,   Pages 905-913 doi: 10.1007/s11709-021-0683-2

Abstract: equipment, such as a pump directly fitted with hanger in the piping system, experiences torsional and bendingHigher crack growth rate occurs because of this torsional load in addition to the bending load.necessary to study the fatigue behavior of piping components under the influence of combined torsional and bending

Keywords： fatigue life     Delale and Erdogan method     RMS–SIF approach     stainless steel     torsion and bending load    

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A novel structural modification to eliminate the early coupling between bending and torsional mode shapes

Nazim Abdul NARIMAN

Frontiers of Structural and Civil Engineering 2017, Volume 11, Issue 2,   Pages 131-142 doi: 10.1007/s11709-016-0376-4

Abstract: novel structural modification approach has been adopted to eliminate the early coupling between the bendingvertical and torsional displacements are calculated at the mid span of the deck to analyze both the bending

Keywords： aeroelastic instability     structural damping     flutter wind speed     bending stiffness     torsional stiffness    

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Analytical algorithms of compressive bending capacity of bolted circumferential joint in metro shield

Frontiers of Structural and Civil Engineering   Pages 901-914 doi: 10.1007/s11709-023-0915-8

Abstract: four stress stages are established to describe the bearing behaviors of the joint under a compressive bending, a parametric investigation is conducted to discuss the factors affecting the ultimate compressive bending

Keywords： shield tunnel     segment joint     joint structural model     failure mechanism    

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A simplified method for investigating the bending behavior of piles supporting embankments on soft ground

Frontiers of Structural and Civil Engineering   Pages 1021-1032 doi: 10.1007/s11709-023-0952-3

Abstract: Previous research has shown that bending failure, particularly during rapid filling on soft ground, isHere, we propose an efficient two-stage method that combines a test-verified soil deformation mechanismand Poulos’ solution for pile–soil interaction to investigate the bending behavior of piles supportingThe results reveal that there are three possible bending failure scenarios for such piles: at the interfaceThe location of the bending failure depends on the position and relative stiffness of the given pile.

Keywords： bending behavior     pile     embankment     soil−structure interaction     failure mode    

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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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Parameter prediction in laser bending of aluminum alloy sheet

WANG Xuyue, XU Weixing, CHEN Hua, WANG Jinsong

Frontiers of Mechanical Engineering 2008, Volume 3, Issue 3,   Pages 293-298 doi: 10.1007/s11465-008-0046-x

Abstract: Based on the basic platform of BP neural networks, a BP network model is established to predict the bendingangle in the laser bending process of an aluminum alloy sheet (1–2 mm in thickness) and to optimizelaser bending parameters for bending control.regularities of sample data are fitted through the trained BP network; the predicted results include laser bending

Keywords： control     industry purpose     nonlinear     network     aluminum    

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The calculation of maximum bending normal stress for sandwich beam based on revised single beam theory

Hao Jingxin,Liu Wenjin and Wu Xinfeng

Strategic Study of CAE 2014, Volume 16, Issue 4,   Pages 92-95

Abstract:

Maximum bending normal stress is one of the important parameters to measuresingle beam theory，after that the numerical examples are demonstrated according to three point flexure testWhen cross section of beam and maximum loading are fixed，the maximum bending normal stress calculated

Keywords： sandwich beam     bending normal stress     single beam theory     bending property    

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Bending performance of composite bridge deck with T-shaped ribs

Qingtian SU, Changyuan DAI, Xu JIANG

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 4,   Pages 990-997 doi: 10.1007/s11709-019-0532-8

Abstract: The mechanical performance, particularly, bending capacity in positive and negative region was carefullyThe test results showed that the plastic performance of this kind of composite bridge deck was satisfyingand the bending capacity was high.

Keywords： bending performance     composite bridge deck     T-shaped steel ribs    

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Title Author Date Type Operation

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

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

Journal Article

Bending failure performance of a shield tunnel segment based on full-scale test and numerical analysis

Journal Article

Experimental and parametrical investigation of pre-stressed ultrahigh-performance fiber-reinforced concrete railway sleepers

Journal Article

Ductility improvement of GFRP-RC beams using precast confined concrete block in compression zone

Journal Article

A new meshless approach for bending analysis of thin plates with arbitrary shapes and boundary conditions

Journal Article

Improved prediction of pile bending moment and deflection due to adjacent braced excavation

Journal Article

3D fracture modelling and limit state analysis of prestressed composite concrete pipes

Pengfei HE, Yang SHEN, Yun GU, Pangyong SHEN

Journal Article

growth behavior of a 170 mm diameter stainless steel straight pipe subjected to combined torsion and bending

Journal Article

A novel structural modification to eliminate the early coupling between bending and torsional mode shapes

Nazim Abdul NARIMAN

Journal Article

Analytical algorithms of compressive bending capacity of bolted circumferential joint in metro shield

Journal Article

A simplified method for investigating the bending behavior of piles supporting embankments on soft ground

Journal Article

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

Journal Article

Parameter prediction in laser bending of aluminum alloy sheet

WANG Xuyue, XU Weixing, CHEN Hua, WANG Jinsong

Journal Article

The calculation of maximum bending normal stress for sandwich beam based on revised single beam theory

Hao Jingxin,Liu Wenjin and Wu Xinfeng

Journal Article

Bending performance of composite bridge deck with T-shaped ribs

Qingtian SU, Changyuan DAI, Xu JIANG

Journal Article