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Secondary transfer length and residual prestress of fractured strand in post-tensioned concrete beams

Frontiers of Structural and Civil Engineering Pages 388-400 doi: 10.1007/s11709-022-0809-1

Abstract: concrete beams to explore the effects of different fracture positions on secondary transfer length and residualprestress of fractured strand.A numerical model is developed and used to predict the secondary transfer length and residual prestressThe residual prestress of fractured strand increases gradually in the secondary transfer length, andaverage prestress loss is 2.28% in the present study.

Keywords： post-tensioned concrete beams strand fracture secondary transfer length residual prestress

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Influence of welding residual stresses on the ductile crack growth resistance of circumferentially cracked

Xiaobo REN, Odd M. AKSELSEN, B?rd NYHUS, Zhiliang ZHANG

Frontiers of Structural and Civil Engineering 2012, Volume 6, Issue 3, Pages 217-223 doi: 10.1007/s11709-012-0169-3

Abstract: Welding residual stress is one of the main concerns for fabrication and operation of steel structuresThis paper focuses on the effect of welding residual stress on the ductile crack growth resistance ofResidual stresses were introduced into the model by using so-called eigenstrain method.Results show that residual stresses reduce the ductile crack growth resistance.The effect of residual stress has also been investigated for cases with different initial void volume

Keywords： residual stress ductile crack growth resistance complete Gurson model eigenstrain method

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The formation mechanism and the influence factor of residual stress in machining

Zhaoxu QI,Bin LI,Liangshan XIONG

Frontiers of Mechanical Engineering 2014, Volume 9, Issue 3, Pages 265-269 doi: 10.1007/s11465-014-0311-0

Abstract:

Residual stresses generated in cutting process have important influences on workpiece performance.The paper presents a method of theoretical analysis in order to explicate the formation mechanism of residualaccumulated plastic strain is the main factor which determines the nature and the magnitude of surface residualOn the basis of the analytical model for residual stress, a series of simulations for residual stressAnd these influences are explained from the perspective of formation mechanism of residual stress in

Keywords： residual stress analytical model strain plastic cutting parameter

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Experiment and optimal design of a collection device for a residual plastic film baler

Qi NIU,Xuegeng CHEN,Chao JI,Jie WU

Frontiers of Agricultural Science and Engineering 2015, Volume 2, Issue 4, Pages 347-354 doi: 10.15302/J-FASE-2015077

Abstract: It is imperative to carry out research on residual plastic film collection technology to solve the seriousThe residual plastic film baler was designed as a package for film strip collection, cleaning and balingthis study to optimize the structure and working parameters for improving the collection efficiency of residualThe results show that the factors affecting the collection rate of residual film and the impurity offilm was 88.9% and the impurity of residual film package was 14.2% for the baler.

Keywords： residual film collection device collection rate of residual film impurity of film package optimization

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Improved analytical model for residual stress prediction in orthogonal cutting

Zhaoxu QI,Bin LI,Liangshan XIONG

Frontiers of Mechanical Engineering 2014, Volume 9, Issue 3, Pages 249-256 doi: 10.1007/s11465-014-0310-1

Abstract:

The analytical model of residual stress in orthogonal cutting proposed by Jiann is an important toolfor residual stress prediction in orthogonal cutting.In application of the model, a problem of low precision of the surface residual stress prediction isThese shortages may directly lead to the low precision of the surface residual stress prediction.At last, an experiment for measuring residual stress in cutting AISI 1045 steel is conducted.

Keywords： residual stress analytical model orthogonal cutting cutting force cutting temperature

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An improved algorithm for McDowell’s analytical model of residual stress

Zhaoxu QI,Bin LI,Liangshan XIONG

Frontiers of Mechanical Engineering 2014, Volume 9, Issue 2, Pages 150-155 doi: 10.1007/s11465-014-0295-9

Abstract: two-dimensional elastoplastic rolling/sliding contact proposed by McDowell is an important tool for predicting residualalgorithm for McDowell’s model is proposed in order to improve its predicting accuracy of the surface residualThe simulation results show that the surface residual stress predicted by modified method is much closer

Keywords： residual stress McDowell’s model volume-constancy of plastic deformation FEM elastoplastic rolling/sliding

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Bayes estimation of residual life by fusing multisource information

Qian ZHAO, Xiang JIA, Zhi-jun CHENG, Bo GUO

Frontiers of Engineering Management 2018, Volume 5, Issue 4, Pages 524-532 doi: 10.15302/J-FEM-2018034

Abstract:

Residual life estimation is essential for reliability engineering.Traditional methods may experience difficulties in estimating the residual life of products with highIn this study, a Bayes model is proposed to estimate the residual life of products by fusing expert knowledgeThe Markov chain Monte Carlo is applied to obtain samples of the parameters and to estimate the residualThe effectiveness and practicability of the proposed method are validated by comparing it with residual

Keywords： residual life estimation Bayes model linear Wiener process

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Residual stresses in coating-based systems, part I: Mechanisms and analytical modeling

ZHANG Xiancheng, WU Yixiong, XU Binshi, WANG Haidou

Frontiers of Mechanical Engineering 2007, Volume 2, Issue 1, Pages 1-12 doi: 10.1007/s11465-007-0001-2

Abstract: thermo-mechanical integrity of these systems is becoming a major concern and is strongly related to the residualIn this paper, the sources of the residual stresses in the coating-based systems and the concept ofAnalytical models were developed to predict the residual stresses in multi-layered film structures orIn addition, the residual stress distributions in the func tionally and compositionally graded coatings

Keywords： briefly different thermo-mechanical integrity addition residual

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Multiscale model of micro curing residual stress evolution in carbon fiber-reinforced thermoset polymer

Xinyu HUI, Yingjie XU, Weihong ZHANG

Frontiers of Mechanical Engineering 2020, Volume 15, Issue 3, Pages 475-483 doi: 10.1007/s11465-020-0590-6

Abstract: In this study, the micro curing residual stresses of carbon fiber-reinforced thermoset polymer (CFRP)By introducing the information from the macroscale perspective, the curing residual stresses are calculatedThe evolution of curing residual stresses reveals the interaction mechanism of fiber, matrix, and interphaseResults show that the curing residual stresses mostly present a tensile state in the matrix and a compressiveFurthermore, the curing residual stresses at different locations in the composites are calculated and

Keywords： CFRP curing residual stress multiscale modeling finite element method

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Deflection behavior of a prestressed concrete beam reinforced with carbon fibers at elevated temperatures

Mohammed FARUQI, Mohammed Sheroz KHAN

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 1, Pages 81-91 doi: 10.1007/s11709-018-0468-4

Abstract: Fiber reinforced polymer(FRP) have unique advantages like high strength to weight ratio, excellent corrosion resistance, improving deformability and cost effectiveness. These advantages have gained wide acceptance in civil engineering applications. FRP tendons for prestressing applications are emerging as one of the most promising technologies in the civil engineering industry. However, the behavior of such members under the influence of elevated temperatures is still unknown. The knowledge and application of this could lead to a cost effective and practical considerations in fire safety design. Therefore, this study examines the deflection behavior of the carbon fiber reinforced polymer(CFRP) prestressed concrete beam at elevated temperatures. In this article, an analytical model is developed which integrates the temperature dependent changes of effective modulus of FRP in predicting the deflection behavior of CFRP prestressed concrete beams within the range of practical temperatures. This model is compared with a finite element mode (FEM) of a simply supported concrete beam prestressed with CFRP subjected to practical elevated temperatures. In addition, comparison is also made with an indirect reference to the real behavior of the material. The results of the model correlated reasonably with the finite element model and the real behavior. Finally, a practical application is provided.

Keywords： FRP CFRP concrete elevated temperatures deflections prestress

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Effects of humic acid on residual Al control in drinking water treatment plants with orthophosphate addition

Wendong WANG, Hua LI, Zhenzhen DING, Xiaochang WANG, Rui LIU

Frontiers of Environmental Science & Engineering 2012, Volume 6, Issue 4, Pages 470-476 doi: 10.1007/s11783-012-0422-y

Abstract: This study aimed to investigate the effects of humic acid (HA) on residual Al control in drinking waterThe results showed that adding orthophosphate was an effective method for residual Al control for theThe presence of HA would notably increase the residual Al concentration.For water with a HA concentration above 5 mg·L , orthophosphate was ineffective in the control of residualHA concentrations in the raw water, solution pH, and the orthophosphate dosage suitable for residual

Keywords： coagulation drinking water humic acid orthophosphate residual Al

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impact analysis and multi-objective optimization design of Mg/Al assembled wheel considering riveting residual

Frontiers of Mechanical Engineering 2022, Volume 17, Issue 3, doi: 10.1007/s11465-022-0701-7

Abstract: connection-performance integration multi-objective optimization design of the assembled wheel considering riveting residual

Keywords： magnesium/aluminum assembled wheel riveting residual stress fatigue analysis impact analysis multi-objective

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Treatment, residual chlorine and season as factors affecting variability of trihalomethanes in small

Roberta DYCK,Geneviève COOL,Manuel RODRIGUEZ,Rehan SADIQ

Frontiers of Environmental Science & Engineering 2015, Volume 9, Issue 1, Pages 171-179 doi: 10.1007/s11783-014-0750-1

Abstract: Residual chlorine and trihalomethanes (THM) were measured over seven years (2003–2009).Chloroform, total THM (TTHM) and residual chlorine concentrations were generally lower in systems usingResidual chlorine was highest in the winter and lowest in the spring and summer.Seasonal variations were most pronounced for residual chlorine in systems with additional treatment.There was generally poor correlation between THM concentrations and concentrations of residual chlorine

Keywords： drinking water residual chlorine seasonal variability small municipal systems treatment technologies

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decouple the contributions of friction and plastic deformation to machined surface temperatures and residual

Subhash ANURAG, Yuebin GUO,

Frontiers of Mechanical Engineering 2010, Volume 5, Issue 3, Pages 247-255 doi: 10.1007/s11465-010-0097-7

Abstract: Residual stress reversal from subsurface maximum residual to surface maximum residual stress may occur

Keywords： surface temperature friction residual stress finite element analysis (FEA) dry cutting tool property

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Ethanol production from sweet sorghum residual

BAN Jingyang, YU Jianliang, ZHANG Xu, TAN Tianwei

Frontiers of Chemical Science and Engineering 2008, Volume 2, Issue 4, Pages 452-455 doi: 10.1007/s11705-008-0072-6

Abstract: In this work, the ethanol production from sweet sorghum residue was studied. Sweet sorghum residue was hydrolyzed with phosphoric acid under mild conditions. The liquid hydrolysate was fermented by , and the hydrolysis residue was fermented by the simultaneous saccharification and fermentation (SSF) using with cellulase (60 FPU/g dry materials). Orthogonal experiments were carried out to investigate the effects of main reaction condition factors, such as temperature, acid concentration, time and dry-matter content, on the reducing sugar yield. The results show that the optimal reaction conditions should be 120°C, 80 g/L, 80 min and 10%, respectively. Under these conditions, 0.3024 g reducing sugar/g dry material was obtained. The liquid hydrolysate was then fermented by with the highest ethanol concentration of 14.5 g/L. At a water-insoluble solid concentration of 5%, 5.4 g/L ethanol was obtained after 12 h of SSF. The total ethanol yield was 0.147 g/g dry material, which would be beneficial for the application of ethanol production from sweet sorghum residue.

Keywords： application material optimal reaction reaction condition temperature

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Title Author Date Type Operation

Secondary transfer length and residual prestress of fractured strand in post-tensioned concrete beams

Journal Article

Influence of welding residual stresses on the ductile crack growth resistance of circumferentially cracked

Xiaobo REN, Odd M. AKSELSEN, B?rd NYHUS, Zhiliang ZHANG

Journal Article

The formation mechanism and the influence factor of residual stress in machining

Zhaoxu QI,Bin LI,Liangshan XIONG

Journal Article

Experiment and optimal design of a collection device for a residual plastic film baler

Qi NIU,Xuegeng CHEN,Chao JI,Jie WU

Journal Article

Improved analytical model for residual stress prediction in orthogonal cutting

Zhaoxu QI,Bin LI,Liangshan XIONG

Journal Article

An improved algorithm for McDowell’s analytical model of residual stress

Zhaoxu QI,Bin LI,Liangshan XIONG

Journal Article

Bayes estimation of residual life by fusing multisource information

Qian ZHAO, Xiang JIA, Zhi-jun CHENG, Bo GUO

Journal Article

Residual stresses in coating-based systems, part I: Mechanisms and analytical modeling

ZHANG Xiancheng, WU Yixiong, XU Binshi, WANG Haidou

Journal Article

Multiscale model of micro curing residual stress evolution in carbon fiber-reinforced thermoset polymer

Xinyu HUI, Yingjie XU, Weihong ZHANG

Journal Article

Deflection behavior of a prestressed concrete beam reinforced with carbon fibers at elevated temperatures

Mohammed FARUQI, Mohammed Sheroz KHAN

Journal Article

Effects of humic acid on residual Al control in drinking water treatment plants with orthophosphate addition

Wendong WANG, Hua LI, Zhenzhen DING, Xiaochang WANG, Rui LIU

Journal Article

impact analysis and multi-objective optimization design of Mg/Al assembled wheel considering riveting residual

Journal Article

Treatment, residual chlorine and season as factors affecting variability of trihalomethanes in small

Roberta DYCK,Geneviève COOL,Manuel RODRIGUEZ,Rehan SADIQ

Journal Article

decouple the contributions of friction and plastic deformation to machined surface temperatures and residual

Subhash ANURAG, Yuebin GUO,

Journal Article

Ethanol production from sweet sorghum residual

BAN Jingyang, YU Jianliang, ZHANG Xu, TAN Tianwei

Journal Article

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