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Effect of loading rate on shear strength parameters of mechanically and biologically treated waste

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 12, doi: 10.1007/s11783-022-1595-7

Abstract:

● Mechanical behavior of MBT waste affected by loading rate was investigated

Keywords： Mechanically and biologically treated waste     Landfill     Triaxial test     Loading rate     Axial strain     Shear    

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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: Structural performance of nuclear containment structures and power plant facilities is of critical importance for public safety. The performance of concrete in a high-speed hard projectile impact is a complex problem due to a combination of multiple failure modes including brittle tensile fracture, crushing, and spalling. In this study, reinforced concrete (RC) and steel-concrete-steel sandwich (SCSS) panels are investigated under high-speed hard projectile inpact. Two modeling techniques, smoothed particle hydrodynamics (SPH) and conventional finite element (FE) analysis with element erosion are used. Penetration depth and global deformation are compared between doubly RC and SCSS panels in order to identify the advantages of the presence of steel plates over the reinforcement layers. A parametric analysis of the front and rear plate thicknesses of the SCSS configuration showed that the SCSS panel with a thick front plate has the best performance in controlling the hard projectile. While a thick rear plate is effective in the case of a large and soft projectile as the plate reduces the rear deformation. The effects of the impact angle and impact velocity are also considered. It was observed that the impact angle for the flat nose missile is critical and the front steel plate is effective in minimizing penetration depth.

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

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Performance of soft-hard-soft (SHS) cement based composite subjected to blast loading with consideration of interface properties

Jun WU,Xuemei LIU

Frontiers of Structural and Civil Engineering 2015, Volume 9, Issue 3,   Pages 323-340 doi: 10.1007/s11709-015-0301-2

Abstract: Strain rate effects of the asphalt concrete were also studied and both compressive and tensile dynamicThe numerical model was established by taking into account the strain rate effect of all concrete materials

Keywords： high strength concrete (SHS)     engineered cementitious composite     interface     blast test     strain rate effect    

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Behavior of steel fiber–reinforced high-strength concrete at medium strain rate

Chujie JIAO, Wei SUN, Shi HUAN, Guoping JIANG

Frontiers of Structural and Civil Engineering 2009, Volume 3, Issue 2,   Pages 131-136 doi: 10.1007/s11709-009-0027-0

Abstract: Impact compression experiments for the steel fiber–reinforced high-strength concrete (SFRHSC) at medium strainrate were conducted using the split Hopkinson press bar (SHPB) testing method.The experimental results showed that, when the strain rate increased from threshold value to 90 s , theincreased about 30%, the elastic modulus of SFRHSC increased about 50%, and the increase in the peak strainThe strength and toughness of the matrix were improved remarkably because of the superposition effect

Keywords： steel fiber–reinforced high-strength concrete (SFRHSC)     high strain rates     split Hopkinson press bar (SHPB)     strain rate hardening effects    

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Effect of dilution rate on dynamic and steady-state biofilm characteristics during phenol biodegradation

Veena Bangalore Rangappa, Vidya Shetty Kodialbail, Saidutta Malur Bharthaiyengar

Frontiers of Environmental Science & Engineering 2016, Volume 10, Issue 4, doi: 10.1007/s11783-016-0863-9

Abstract: Dynamic and steady state biofilm characteristics depend on dilution rate (DR).The present paper reports the studies on the effect of dilution rate on the physical, chemical and morphologicalThe percentage degradation of phenol decreased from 99% to 73% with an increase in dilution rate fromIncrease in dilution rate leads to decrease in biofilm thickness, biofilm dry density, and attached drysteady-state biofilm characteristics associated with phenol biodegradation is a strong function of dilution rate

Keywords： Biofilm     Exopolymeric substances     Phenol     Dilution rate     Pulsed plate bioreactor    

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Vibration analysis of nano-structure multilayered graphene sheets using modified strain gradient theory

Amir ALLAHBAKHSHI,Masih ALLAHBAKHSHI

Frontiers of Mechanical Engineering 2015, Volume 10, Issue 2,   Pages 187-197 doi: 10.1007/s11465-015-0339-9

Abstract:

In this paper, for the first time, the modified strain gradient theory is used as a new size-dependentKirchhoff micro-plate model to study the effect of interlayer van der Waals (vdW) force for the vibrationThe model contains three material length scale parameters, which may effectively capture the size effectAfter obtaining the governing equations based on modified strain gradient theory via principle of minimum

Keywords： graphene     van der Waals (vdW) force     modi- fied strain gradient elasticity theory     size effect parameter    

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The effect of carbon nanotubes and polypropylene fibers on bond of reinforcing bars in strain resilient

Souzana P. TASTANI,Maria S. KONSTA-GDOUTOS,Stavroula J. PANTAZOPOULOU,Victor BALOPOULOS

Frontiers of Structural and Civil Engineering 2016, Volume 10, Issue 2,   Pages 214-223 doi: 10.1007/s11709-016-0332-3

Abstract: In the tests, the matrix comprises a novel, strain resilient cementitious composite (SRCC) reinforcedthe synergy between PP fibers and CNTs in the matrix, namely the maintenance of the multi-cracking effectcontrolled bar-slip; the elasto-plastic bond response envelope was a result of the confining synergistic effect

Keywords： carbon nanotubes     strain resilient cementitious composite     polypropylene fibers     tensile bending     bond    

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Effect of fine solid particles on absorption rate of gaseous CO

LU Sumin, MA Youguang, SHEN Shuhua, ZHU Chunying

Frontiers of Chemical Science and Engineering 2008, Volume 2, Issue 4,   Pages 368-372 doi: 10.1007/s11705-008-0067-3

Abstract: The experimental results show that the active carbon particles could enhance the absorption rate of gaseousslurry, while in the cyclohexane slurry, active carbon particles indicated no the absorption enhancement effectHowever, it was observed that the active alumina and silica gel particles could enhance the absorption rateThese phenomena indicate that the solid particles, which could enhance the gaseous CO absorption rateexperimental results also show that, as for those solid particles which could enhance the gas absorption rate

Keywords： constant     influence     soybean     solvent     concentration    

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Reevaluation of the effect of Dianxianning on seizure rate of refractory epilepsy as additive treatment

Liyun He, Tiancai Wen, Shiyan Yan, Runjin Li, Zufa Liu, Hui Ren, Jinmin Liu, Fengshan Zhang, Jianzhong Wu, Jian Liu

Frontiers of Medicine 2011, Volume 5, Issue 2,   Pages 229-234 doi: 10.1007/s11684-011-0139-5

Abstract: We observed the effect of Dianxianning, which was used as additive treatment to treat 206 epilepsy patients, on the epilepsy seizure rate.The results showed that 1) Effect on seizure rate: After a three-month treatment, the seizure rate ofThe results indicated that, as an additive treatment, Dianxianning has a good effect on controlling theepilepsy seizure rate and frequency management.

Keywords： Dianxianning     epilepsy seizure     evaluation    

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Effect of seismic wave propagation in massed medium on rate-dependent anisotropic damage growth in concrete

Alireza DANESHYAR, Hamid MOHAMMADNEZHAD, Mohsen GHAEMIAN

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 2,   Pages 346-363 doi: 10.1007/s11709-021-0694-z

Abstract: formulated to reproduce irreversible deformations and tensorial degeneration of concrete in a coupled and rate-dependent

Keywords： soil–structure interaction     massed foundation     radiation damping     anisotropic damage    

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Concepts and implementation of strain-based criteria in design codes for steel structures

Reidar BJORHOVDE

Frontiers of Structural and Civil Engineering 2012, Volume 6, Issue 3,   Pages 210-216 doi: 10.1007/s11709-012-0165-7

Abstract: If stresses or forces are needed, these are easily determined by the value of the strain and the relevant

Keywords： steel     stress-strain characteristics     tension test     strain design     actual behavior     improved design codes    

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Reconsideration on the effect of nitrogen on mixed culture polyhydroxyalkanoate production toward high

Zhiqiang Chen, Lizhi Zhao, Ye Ji, Qinxue Wen, Long Huang

Frontiers of Environmental Science & Engineering 2019, Volume 13, Issue 4, doi: 10.1007/s11783-019-1135-2

Abstract:

Effect of nitrogen on mixed culture PHA production was reconsidered

Keywords： Polyhydroxyalkanoate (PHA)     Organic loading rate     Nitrogen content     Biomass growth     Enrichment history    

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Ultrasonic assisted EDM: Effect of the workpiece vibration in the machining characteristics of FW4 Welded

Mohammadreza SHABGARD, Hamed KAKOLVAND, Mirsadegh SEYEDZAVVAR, Ramin Mohammadpour SHOTORBANI

Frontiers of Mechanical Engineering 2011, Volume 6, Issue 4,   Pages 419-428 doi: 10.1007/s11465-011-0246-7

Abstract: The studied process characteristics included the material removal rate (MRR), tool wear ratio (TWR),The experimental results show that in short pulse on-times, material removal rate in the US-EDM process

Keywords： electrical discharge machining (EDM)     material removal rate (MRR)     tool wear ratio (TWR)     surface roughness    

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Full-field dynamic strain reconstruction of an aero-engine blade from limited displacement responses

Frontiers of Mechanical Engineering 2023, Volume 18, Issue 1, doi: 10.1007/s11465-022-0731-1

Abstract: Blade strain distribution and its change with time are crucial for reliability analysis and residualTraditional strain measurements are achieved by strain gauges (SGs) in a contact manner at discrete positionsThis study proposes a method of full-field and real-time strain reconstruction of an aero-engine bladeLimited optical measured displacement responses are utilized to reconstruct the full-field strain.The full-field strain distribution is in-time visualized.

Keywords： aero-engine blade     displacement response     dynamic strain reconstruction     mode shape     strain gauge    

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Strain and process engineering toward continuous industrial fermentation

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 10,   Pages 1336-1353 doi: 10.1007/s11705-022-2284-6

Abstract: Most current biotechnology industries are based on batch or fed-batch fermentation processes, which often show low productivity and high production costs compared to chemical processes. To increase the economic competitiveness of biological processes, continuous fermentation technologies are being developed that offer significant advantages in comparison with batch/fed-batch fermentation processes, including: (1) removal of potential substrates and product inhibition, (2) prolonging the microbial exponential growth phase and enhancing productivity, and (3) avoiding repeated fermentation preparation and lowering operation and installation costs. However, several key challenges should be addressed for the industrial application of continuous fermentation processes, including (1) contamination of the fermentation system, (2) degeneration of strains, and (3) relatively low product titer. In this study, we reviewed and discussed metabolic engineering and synthetic biology strategies to address these issues.

Keywords： continuous fermentation     productivity     contamination     strain degeneration     metabolic engineering    

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Title Author Date Type Operation

Effect of loading rate on shear strength parameters of mechanically and biologically treated waste

Journal Article

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

Mohammad HANIFEHZADEH, Bora GENCTURK

Journal Article

Performance of soft-hard-soft (SHS) cement based composite subjected to blast loading with consideration of interface properties

Jun WU,Xuemei LIU

Journal Article

Behavior of steel fiber–reinforced high-strength concrete at medium strain rate

Chujie JIAO, Wei SUN, Shi HUAN, Guoping JIANG

Journal Article

Effect of dilution rate on dynamic and steady-state biofilm characteristics during phenol biodegradation

Veena Bangalore Rangappa, Vidya Shetty Kodialbail, Saidutta Malur Bharthaiyengar

Journal Article

Vibration analysis of nano-structure multilayered graphene sheets using modified strain gradient theory

Amir ALLAHBAKHSHI,Masih ALLAHBAKHSHI

Journal Article

The effect of carbon nanotubes and polypropylene fibers on bond of reinforcing bars in strain resilient

Souzana P. TASTANI,Maria S. KONSTA-GDOUTOS,Stavroula J. PANTAZOPOULOU,Victor BALOPOULOS

Journal Article

Effect of fine solid particles on absorption rate of gaseous CO

LU Sumin, MA Youguang, SHEN Shuhua, ZHU Chunying

Journal Article

Reevaluation of the effect of Dianxianning on seizure rate of refractory epilepsy as additive treatment

Liyun He, Tiancai Wen, Shiyan Yan, Runjin Li, Zufa Liu, Hui Ren, Jinmin Liu, Fengshan Zhang, Jianzhong Wu, Jian Liu

Journal Article

Effect of seismic wave propagation in massed medium on rate-dependent anisotropic damage growth in concrete

Alireza DANESHYAR, Hamid MOHAMMADNEZHAD, Mohsen GHAEMIAN

Journal Article

Concepts and implementation of strain-based criteria in design codes for steel structures

Reidar BJORHOVDE

Journal Article

Reconsideration on the effect of nitrogen on mixed culture polyhydroxyalkanoate production toward high

Zhiqiang Chen, Lizhi Zhao, Ye Ji, Qinxue Wen, Long Huang

Journal Article

Ultrasonic assisted EDM: Effect of the workpiece vibration in the machining characteristics of FW4 Welded

Mohammadreza SHABGARD, Hamed KAKOLVAND, Mirsadegh SEYEDZAVVAR, Ramin Mohammadpour SHOTORBANI

Journal Article

Full-field dynamic strain reconstruction of an aero-engine blade from limited displacement responses

Journal Article

Strain and process engineering toward continuous industrial fermentation

Journal Article