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Calculation Method of Explosively Formed Projectile Velocity

Zhao Huiying,Shen Zhaowu

Strategic Study of CAE 2007, Volume 9, Issue 8,   Pages 62-65

Abstract: detonation product and momentum conservation,  this paper obtains velocity calculation model of explosivelyformed projectile (EFP) and the model is revised due to the influence of the ratio of charge altitude This paper calculates the velocities of EFPs formed by large apex angle liner and sphere liner

Keywords： explosively formed projectile (EFP)     instantaneous expansion of detonation product     momentum conservation    

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A New Model Shaped Charge Warhead and the Discussion of It's Evolution

An Erfeng,Shen Zhaowu,Zhou Tingqing,Wang Derun

Strategic Study of CAE 2004, Volume 6, Issue 6,   Pages 85-90

Abstract: warhead based on the energy viewpoint and discusse mechanisms of formation and penetration of jet and projectile

Keywords： shaped charge warhead     explosively formed projectile     shaped charge jet     ERA     penetration    

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Hot-dip galvanizing of cold-formed steel hollow sections: a state-of-the-art review

Min SUN, Jeffrey A. PACKER

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 1,   Pages 49-65 doi: 10.1007/s11709-017-0448-0

Abstract: This review paper is motivated by a series of recent reports on cracking in galvanized cold-formed tubular

Keywords： cold-formed steel     hollow structural sections     hot-dip galvanizing     embrittlement     heat-treatment     residual    

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Buffer capacity of granular matter to impact of spherical projectile based on discrete element method

Ying YAN, Pengfei LI, Shunying JI

Frontiers of Structural and Civil Engineering 2013, Volume 7, Issue 1,   Pages 50-54 doi: 10.1007/s11709-013-0186-x

Abstract: granular matter, the discrete element method (DEM) is adopted to simulate the impact of a spherical projectileThe dynamic responses of the projectile are obtained for both thin and thick granular bed.The penetration depth of the projectile and the first impact peak are investigated with different bed

Keywords： granular matter     impact peak     buffer capacity     discrete element method     critical thickness    

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Nitrifying and denitrifying bacteria in aerobic granules formed in sequencing batch airlift reactors

WANG Fang, YANG Fenglin, QI Aijiu

Frontiers of Environmental Science & Engineering 2007, Volume 1, Issue 2,   Pages 184-189 doi: 10.1007/s11783-007-0032-2

Abstract: Aerobic granules were formed in an internal-circulate sequencing batch airlift reactor (SBAR) and biodegradation
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Structural behavior of intermediate length cold-formed steel rack columns with C-stitches

M. ANBARASU, Mahmud ASHRAF

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 4,   Pages 937-949 doi: 10.1007/s11709-019-0528-4

Abstract: This article presents an experimental and numerical investigation on the strength and performance of intermediate length rack column sections with C-stitches under axial compression. The test program consisted of 10 axial concentric compression tests on columns with and without C-stitches under pin end conditions for two different geometric lengths. Finite element (FE) models were developed using commercial FE package ABAQUS considering material and geometric nonlinearities as well as initial geometric imperfections. The elastic buckling properties of the section were calculated using readily available linear elastic buckling analysis tools based on Generalized Beam Theory (GBT) and Finite Strip Method (FSM). Obtained FE results were compared with those obtained experimentally, and once verified the developed FE modeling technique was used to carry out a parametric study to examine changes in structural response due to variations in length, depth and spacing of C-stitches. Observed influences of C-stitches on the behavior and resistance of the considered columns were carefully analyzed, and key design aspects are presented herein.

Keywords： cold-formed steel columns     C-stitches     intermediate length columns     distortional buckling    

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Experimental study on film combustion formed by spirally fluted horizontal tube

MEI Ning, ZHANG Bin, ZHAO Jian, ZHANG Ming

Frontiers in Energy 2008, Volume 2, Issue 1,   Pages 54-58 doi: 10.1007/s11708-008-0023-4

Abstract: Falling fuel film on the spirally fluted surface of a horizontal tube can provide rapid fuel evaporation and homogeneous mixture formation. This fuel film combustion could be applied in a micro-combustion system even without a fuel pump. A test bed was established and experimental comparisons were made between the prototype and a transferred cup atomizer micro-combustor. The theoretical and experimental results show that film combustion has a higher combustion efficiency, a lower pollutant emission and a better working performance.

Keywords： homogeneous     transferred     evaporation     micro-combustion     efficiency    

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Gas marbles: ultra-long-lasting and ultra-robust bubbles formed by particle stabilization

Frontiers of Chemical Science and Engineering   Pages 1681-1687 doi: 10.1007/s11705-022-2180-0

Abstract: Bubbles and foams are ubiquitous in daily life and industrial processes. Studying their dynamic behaviors is of key importance for foam manufacturing processes in food packaging, cosmetics and pharmaceuticals. Bare bubbles are inherently fragile and transient; enhancing their robustness and shelf lives is an ongoing challenge. Their rupture can be attributed to liquid evaporation, thin film drainage and the nuclei of environmental dust. Inspired by particle-stabilized interfaces in Pickering emulsions, armored bubbles and liquid marble, bubbles are protected by an enclosed particle-entrapping liquid thin film, and the resultant soft object is termed gas marble. The gas marble exhibits mechanical strength orders of magnitude higher than that of soap bubbles when subjected to overpressure and underpressure, owing to the compact particle monolayer straddling the surface liquid film. By using a water-absorbent glycerol solution, the resulting gas marble can persist for 465 d in normal atmospheric settings. This particle-stabilizing approach not only has practical implications for foam manufacturing processes but also can inspire the new design and fabrication of functional biomaterials and biomedicines.

Keywords： bubble     particles     interfaces     armored bubble     liquid marble     gas marble     Pickering emulsion    

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Effects of a dynamic membrane formed with polyethylene glycol on the ultrafiltration of natural organic

Boksoon KWON, Noeon PARK, Jaeweon CHO,

Frontiers of Environmental Science & Engineering 2010, Volume 4, Issue 2,   Pages 172-182 doi: 10.1007/s11783-010-0002-y

Abstract: The advantages of DM formed with PEG can be summarized as follows: (1) PEG interferes with NOM transmission

Keywords： dynamic membrane     natural organic matters     ultrafiltration membrane performance     effective PSD     effective molecular weight cutoff    

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Experimental investigation of lavge-loading projectile penetrating

Zhao Shengwei,Gu Renhong,Chu Zhe,Li Ming

Strategic Study of CAE 2009, Volume 11, Issue 8,   Pages 44-47

Abstract:

A thin-walls projectile has been designed,and penetration depth of projectilesAxial acceleration was evaluated by SAPLL. penetration process of projectile on penetrating concreteMechanical Parameters of projectile material were studied by experiment.Penetration depth and structure intensity of projectile were examined by a series of experiments on penetratingA conclusion is obtained, projectile isn't destroyed during penetrating concrete target,and reinforced

Keywords： thin-walls projectile     concrete     penetration depth    

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Atomic force microscopy study on the microtopography of natural organic matter and newly formed hydrous

GUO Jin, MA Jun, SHI Xuehua

Frontiers of Environmental Science & Engineering 2007, Volume 1, Issue 2,   Pages 251-256 doi: 10.1007/s11783-007-0043-z

Abstract: coagulation-aid during the preoxidation process, the microtopography of its reductive products, the newly formedThe morphology of natural organic matter (NOM) adsorbed by the newly formed hydrous manganese dioxideBy using the tapping mode atomic force microscopy (AFM), the observation results show that the newly formedWhen 1 mmol/L newly formed hydrous manganese dioxide was added, the microtopography of NOM moleculesThese results provide a valid proof that it is the perfect adsorption capability of the newly formed

Keywords： spherical     microtopography     potassium permanganate     uniform spherical     morphology    

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Dynamic material performance of cold-formed steel hollow sections: a state-of-the-art review

Cameron B. RITCHIE, Jeffrey A. PACKER, Xiao-Ling ZHAO, Amin HEIDARPOUR, Yiyi CHEN

Frontiers of Structural and Civil Engineering 2017, Volume 11, Issue 2,   Pages 209-227 doi: 10.1007/s11709-017-0388-8

Abstract: This paper presents a literature review focused on the material performance of cold-formed, carbon steelUnder large-scale field blast experiments, cold-formed hollow sections have shown excellent behavior.

Keywords： cold-formed steel     hollow structural sections     composites     impulsive loading     impact     blast     experimentation    

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Experimental, analytical and numerical studies on concrete encased trapezoidally web profiled cold formed

Divahar RAVI, Aravind Raj PONSUBBIAH, Sangeetha Sreekumar PRABHA, Joanna Philip SARATHA

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 4,   Pages 930-946 doi: 10.1007/s11709-020-0652-1

Abstract: Concrete encased with trapezoidally corrugated web profiled cold-formed steel beams are used worldwideinvestigation on the flexural behavior of concrete encased trapezoidally corrugated web profiled cold-formedengineering applications on seismic resistant structures and efficient usage of concrete encased with cold-formedpredicting flexural strength accurately for such concrete encased trapezoidally corrugated web profiled cold-formed

Keywords： concrete encased beam     trapezoidally corrugated web     loading capacity     super elasto-plastic    

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Development of realistic design fire time-temperature curves for the testing of cold-formed steel wall

Anthony Deloge ARIYANAYAGAM,Mahen MAHENDRAN

Frontiers of Structural and Civil Engineering 2014, Volume 8, Issue 4,   Pages 427-447 doi: 10.1007/s11709-014-0279-1

Abstract: Fire resistance rating of light gauge steel frame (LSF) wall systems is obtained from fire tests based on the standard fire time-temperature curve. However, fire severity has increased in modern buildings due to higher fuel loads as a result of modern furniture and light weight constructions that make use of thermoplastics materials, synthetic foams and fabrics. Some of these materials are high in calorific values and increase both the spread of fire growth and heat release rate, thus increasing the fire severity beyond that of the standard fire curve. Further, the standard fire curve does not include a decay phase that is present in natural fires. Despite the increasing usage of LSF walls, their behavior in real building fires is not fully understood. This paper presents the details of a research study aimed at developing realistic design fire curves for use in the fire tests of LSF walls. It includes a review of the characteristics of building fires, previously developed fire time-temperature curves, computer models and available parametric equations. The paper highlights that real building fire time-temperature curves depend on the fuel load representing the combustible building contents, ventilation openings and thermal properties of wall lining materials, and provides suitable values of many required parameters including fuel loads in residential buildings. Finally, realistic design fire time-temperature curves simulating the fire conditions in modern residential buildings are proposed for the testing of LSF walls.

Keywords： fire safety     standard fire curve     realistic design fire time-temperature curves     light gauge steel frame (LSF) walls     fire resistance rating     fuel load    

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An investigation of ballistic response of reinforced and sandwich concrete panels using computational techniques

Mohammad HANIFEHZADEH, Bora GENCTURK

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 5,   Pages 1120-1137 doi: 10.1007/s11709-019-0540-8

Abstract: The performance of concrete in a high-speed hard projectile impact is a complex problem due to a combinationconcrete (RC) and steel-concrete-steel sandwich (SCSS) panels are investigated under high-speed hard projectileshowed that the SCSS panel with a thick front plate has the best performance in controlling the hard projectileWhile a thick rear plate is effective in the case of a large and soft projectile as the plate reduces

Keywords： concrete panels     projectile impact     finite element modeling     smoothed particle hydrodynamics     strain rate    

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Title Author Date Type Operation

Calculation Method of Explosively Formed Projectile Velocity

Zhao Huiying,Shen Zhaowu

Journal Article

A New Model Shaped Charge Warhead and the Discussion of It's Evolution

An Erfeng,Shen Zhaowu,Zhou Tingqing,Wang Derun

Journal Article

Hot-dip galvanizing of cold-formed steel hollow sections: a state-of-the-art review

Min SUN, Jeffrey A. PACKER

Journal Article

Buffer capacity of granular matter to impact of spherical projectile based on discrete element method

Ying YAN, Pengfei LI, Shunying JI

Journal Article

Nitrifying and denitrifying bacteria in aerobic granules formed in sequencing batch airlift reactors

WANG Fang, YANG Fenglin, QI Aijiu

Journal Article

Structural behavior of intermediate length cold-formed steel rack columns with C-stitches

M. ANBARASU, Mahmud ASHRAF

Journal Article

Experimental study on film combustion formed by spirally fluted horizontal tube

MEI Ning, ZHANG Bin, ZHAO Jian, ZHANG Ming

Journal Article

Gas marbles: ultra-long-lasting and ultra-robust bubbles formed by particle stabilization

Journal Article

Effects of a dynamic membrane formed with polyethylene glycol on the ultrafiltration of natural organic

Boksoon KWON, Noeon PARK, Jaeweon CHO,

Journal Article

Experimental investigation of lavge-loading projectile penetrating

Zhao Shengwei,Gu Renhong,Chu Zhe,Li Ming

Journal Article

Atomic force microscopy study on the microtopography of natural organic matter and newly formed hydrous

GUO Jin, MA Jun, SHI Xuehua

Journal Article

Dynamic material performance of cold-formed steel hollow sections: a state-of-the-art review

Cameron B. RITCHIE, Jeffrey A. PACKER, Xiao-Ling ZHAO, Amin HEIDARPOUR, Yiyi CHEN

Journal Article

Experimental, analytical and numerical studies on concrete encased trapezoidally web profiled cold formed

Divahar RAVI, Aravind Raj PONSUBBIAH, Sangeetha Sreekumar PRABHA, Joanna Philip SARATHA

Journal Article

Development of realistic design fire time-temperature curves for the testing of cold-formed steel wall

Anthony Deloge ARIYANAYAGAM,Mahen MAHENDRAN

Journal Article

An investigation of ballistic response of reinforced and sandwich concrete panels using computational techniques

Mohammad HANIFEHZADEH, Bora GENCTURK

Journal Article