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Accelerated life-time test of MEA durability under vehicle operating conditions in PEM fuel cell

Tian TIAN, Jianjun TANG, Wei GUO, Mu PAN

Frontiers in Energy 2017, Volume 11, Issue 3,   Pages 326-333 doi: 10.1007/s11708-017-0489-z

Abstract: In this paper, a novel accelerated test method was proposed to analyze the durability of MEA, consideringThe experimental results indicate that the proposed method can effectively destroy the MEA in a short time

Keywords： polymer electrolyte membrane fuel cell     accelerated life-time test     load cycling test     durability    

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Sustainability of steel structures: towards an integrated approach to life-time engineering design

Raffaele LANDOLFO, Lucrezia CASCINI, Francesco PORTIOLI

Frontiers of Structural and Civil Engineering 2011, Volume 5, Issue 3,   Pages 304-314 doi: 10.1007/s01709-011-0123-9

Abstract: The goal to achieve is the optimization of performances, over the whole life-cycle, with respect to environmentaladvances, the concept of sustainability applied to constructions covers a number of branches such as life-cycleIndeed the current trend in civil engineering research is moving towards life-time engineering, withintroduction of the concept of sustainability applied to constructions, this paper presents an overview of life-timeFinally a proposal towards an integrated approach to life-time engineering design of steel structures

Keywords： sustainability     life-time engineering     performance based design     durability     metal structures    

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Erratum to: Determination of cut-off time of accelerated aging test under temperature stress for LED

Jian Hao, Lei Jing, Hong-liang Ke, Yao Wang, Qun Gao, Xiao-xun Wang, Qiang Sun, Zhi-jun Xu,sunq@ciomp.ac.cn

Frontiers of Information Technology & Electronic Engineering 2017, Volume 18, Issue 10,   Pages 1678-1678 doi: 10.1631/FITEE.15e0483

Abstract: Erratum to: , 2017 18(8):1197-1204. doi:

Keywords： LED lamp     Accelerated aging test     Medium lifetime     Moving average error    

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Zero-failure accelerated reliability demonstration test method based on degradation model

Zhang Huirui

Strategic Study of CAE 2015, Volume 17, Issue 5,   Pages 31-37

Abstract:

Traditional life demonstration test is conducted under normal conditions and fails to use degradationAlso higher stress can accelerate the degradation of the unit to cut down the test time.Thus it is necessary to propose a method that take advantage of both degradation data and acceleratedtest to reduce the test time and cost，which is done by this article.time.

Keywords： degradation model；accelerated testing；life demonstration；risk analysis；optimum plan    

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Qian Xuesen—An Example for Scientific and Technological Circles to Learn From

Tu Yuanji

Strategic Study of CAE 2002, Volume 4, Issue 2,   Pages 1-7

Abstract:

Qian Xuesen´s life-time is reviewed in this article and his excellent character and behaviour

Keywords： life-time     seek knowledge     tackle key problems in science and technology     work style     thinking and moral    

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Erratum to: Determination of cut-off time of accelerated aging test under temperature stress for LED Article

Jian HAO, Lei JING, Hong-liang KE, Yao WANG, Qun GAO, Xiao-xun WANG, Qiang SUN, Zhi-jun XU

Frontiers of Information Technology & Electronic Engineering 2017, Volume 18, Issue 10,   Pages 1678-1678 doi: 10.1631/FITEE.1500483

Abstract: 在LED灯具加速老化过程中，为获得最小截止时间，对其寿命进行快速预估，本文采用5阶滑动平均误差方法分析数据。选用同批次的16个样本，分别进行80℃和85℃应力条件下的加速老化。首先，采用e指数对光通维持率进行拟合，获得每个灯具的加速寿命，进而采用威布尔分布对加速寿命进行拟合，获得中位寿命。其次，采用平均滑动误差方法，可获取不同截止时间下中位寿命预估误差。结果表明：加速老化过程中，存在最小截止时间，该时间可通过滑动平均误差和截止时间的关系确定；当截止时间小于该值时，寿命预估不合理；寿命预估误差随截止时间增加而逐渐减小。对于该类LED灯具，80℃时最小截止时间为1104小时，寿命预估误差为1.15%；85℃时最小截止时间为936小时，寿命预估误差为1.24%。当寿命估计误差约为0.46％时，80 ℃和85 ℃对应的中位寿命分别为7310小时和4598小时。

Keywords： LED lamp     Accelerated aging test     Medium lifetime     Moving average error    

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Pretest analysis of shake table response of a two-span steel girder bridge incorporating accelerated

Elmira SHOUSHTARI, M. Saiid SAIIDI, Ahmad ITANI, Mohamed A. MOUSTAFA

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 1,   Pages 169-184 doi: 10.1007/s11709-019-0590-y

Abstract: This paper presents pretest analysis of a shake table test model of a 0.35-scale, two-span, steel plateSix accelerated bridge construction connections were incorporated in the bridge model.

Keywords： shake table test     accelerated bridge construction     steel girder bridge     OpenSEES     UHPC     simple for dead continuous    

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Service Life Supervision for Individual Aircraft Structural System Based on Aircraft Structural Life

He Yuting

Strategic Study of CAE 2006, Volume 8, Issue 6,   Pages 23-27

Abstract:

Based on the analysis of the aircraft structural life envelope (ASLE) under the baseline operationalconditions, an approach of establishment of aircraft structural life envelope (ASLE) under nonbaselineThe method of service life supervision for individual aircraft structural system(SLSFIASS) under nonbaselineTaking the supervision of the time between the first and second overhauls for an aircraft structural

Keywords： aircraft structure     life envelope     service life supervision     time between overhauls    

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Monitoring corrosion of reinforcement in concrete structures via fiber Bragg grating sensors

Zhupeng ZHENG, Xiaoning SUN, Ying LEI

Frontiers of Mechanical Engineering 2009, Volume 4, Issue 3,   Pages 316-319 doi: 10.1007/s11465-009-0040-y

Abstract: Corrosion of steel and rebar in concrete structures is one of the most frequent reasons for civil infrastructure failures. Thus, improving the effective corrosion sensor technology can greatly reduce cost and provide safe structures with long service lives. However, assessing the corrosion condition of rebars is not simple because they are buried in concrete. In this paper, using fiber Bragg grating (FBG), a corrosion sensor for monitoring steel rebars embedded in a concrete structure is developed and validated by experiments. Based on the fact that the volume and diameter of a rebar embedded in concrete will enlarge due to corrosion, an FBG packaged with fiber-reinforced plastics (FRP) is wrapped on the steel bar. During corrosion, the increase in the bar diameter leads to the increase in fiber strain, which can be measured by the shift of the wavelength of FBG. Performances of the corrosion sensor are validated by accelerating corrosion in lab experiments. The corrosion sensor is embedded in a concrete specimen put in a 5% sodium chloride solution with a constant current. Experimental results show that the corrosion sensor can monitor the concurrence of corrosion of rebars in concrete. The corrosion extent can be quantitatively evaluated through the change in the wavelength of FBG. Therefore, the corrosion sensor developed in this paper is feasible for monitoring the early corrosion of rebars in concrete.

Keywords： fiber Bragg grating (FBG)     corrosion     concrete structures     accelerated corrosion test    

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Enhancing fatigue life of cylinder-crown integrated structure by optimizing dimension

Weiwei ZHANG,Xiaosong WANG,Zhongren WANG,Shijian YUAN

Frontiers of Mechanical Engineering 2015, Volume 10, Issue 1,   Pages 102-110 doi: 10.1007/s11465-015-0329-y

Abstract: During the engineering design of cylinder-crown integrated structure, in order to increase the fatigue lifeSubsequently, strain-controlled fatigue test is carried out, and the stress-strain hysteresis loops andBased on linear fit, the fatigue properties are calculated and used for the fatigue life prediction.It is shown that the predicted fatigue life is significantly increased from 157000 to 1070000 cycles

Keywords： integrated hydraulic press (CCIHP)     adaptive macro genetic algorithms (AMGA)     strain-controlled fatigue test    

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Time-domain and frequency-domain approaches to identification of bridge flutter derivatives

Zhengqing CHEN

Frontiers of Structural and Civil Engineering 2009, Volume 3, Issue 2,   Pages 173-179 doi: 10.1007/s11709-009-0034-1

Abstract: bluff-body model, a comparative study was made to identify the flutter derivatives of each model by using a time-domainall the flutter derivatives of the thin-plate model identified with the frequency-domain method and time-domainThe formulation of time-domain method makes the identification results of flutter derivatives relatively

Keywords： long-span bridges     wind-induced vibration     flutter derivatives     forced vibration test     time-domain method    

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The Application of Comprehensive Service Flying Hour to the Failure Analysis of Corrosion Fatigue Life

Lin Ming,Jin Ping,Sun Mingli

Strategic Study of CAE 2001, Volume 3, Issue 3,   Pages 65-67

Abstract: life.The service life of aircraft is greatly influenced by the severe environment of naval aircraft where, in which factors such as flying time, calendar time and comprehensive service flying time are takenof the hinge is discussed in respect of flying time, calendar time and comprehensive service flyingtime.

Keywords： corrosion     corrosion fatigue     flying time     calendar time     comprehensive service flying time    

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Digitalization optical open loop test system for fiber optic gyroscope

ZHANG Deng-wei, SHU Xiao-wu, MU Xu-dong, LIU Cheng

Frontiers of Mechanical Engineering 2006, Volume 1, Issue 4,   Pages 434-438 doi: 10.1007/s11465-006-0053-8

Abstract: With a digital sampling and processing system designed with VC++ in Windows platform, the real-time controlling

Keywords： stability     real-time controlling     standardization     controlling procedure     complete digitalization    

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A new procedure combining GC-MS with accelerated solvent extraction for the analysis of phthalic acid

Tingting MA, Ying TENG, Peter CHRISTIE, Yongming LUO, Yongshan CHEN, Mao YE, Yujuan HUANG

Frontiers of Environmental Science & Engineering 2013, Volume 7, Issue 1,   Pages 31-42 doi: 10.1007/s11783-012-0463-2

Abstract: An optimized procedure based on gas chromatography-mass spectrometry (GC-MS) combined with accelerated

Keywords： phthalic acid esters     quality assurance and quality control     soil type     accelerated solvent extraction     certified    

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Precast steel–UHPC lightweight composite bridge for accelerated bridge construction

Shuwen DENG, Xudong SHAO, Xudong ZHAO, Yang WANG, Yan WANG

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 2,   Pages 364-377 doi: 10.1007/s11709-021-0702-3

Abstract: Based on the test results, a crack width prediction method for the joint interface, a simplified calculationGood agreements were achieved between the predicted values and test results.

Keywords： accelerated bridge construction     ultrahigh-performance concrete     steel–UHPC composite bridge     UHPC girder-to-girder    

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Title Author Date Type Operation

Accelerated life-time test of MEA durability under vehicle operating conditions in PEM fuel cell

Tian TIAN, Jianjun TANG, Wei GUO, Mu PAN

Journal Article

Sustainability of steel structures: towards an integrated approach to life-time engineering design

Raffaele LANDOLFO, Lucrezia CASCINI, Francesco PORTIOLI

Journal Article

Erratum to: Determination of cut-off time of accelerated aging test under temperature stress for LED

Jian Hao, Lei Jing, Hong-liang Ke, Yao Wang, Qun Gao, Xiao-xun Wang, Qiang Sun, Zhi-jun Xu,sunq@ciomp.ac.cn

Journal Article

Zero-failure accelerated reliability demonstration test method based on degradation model

Zhang Huirui

Journal Article

Qian Xuesen—An Example for Scientific and Technological Circles to Learn From

Tu Yuanji

Journal Article

Erratum to: Determination of cut-off time of accelerated aging test under temperature stress for LED

Jian HAO, Lei JING, Hong-liang KE, Yao WANG, Qun GAO, Xiao-xun WANG, Qiang SUN, Zhi-jun XU

Journal Article

Pretest analysis of shake table response of a two-span steel girder bridge incorporating accelerated

Elmira SHOUSHTARI, M. Saiid SAIIDI, Ahmad ITANI, Mohamed A. MOUSTAFA

Journal Article

Service Life Supervision for Individual Aircraft Structural System Based on Aircraft Structural Life

He Yuting

Journal Article

Monitoring corrosion of reinforcement in concrete structures via fiber Bragg grating sensors

Zhupeng ZHENG, Xiaoning SUN, Ying LEI

Journal Article

Enhancing fatigue life of cylinder-crown integrated structure by optimizing dimension

Weiwei ZHANG,Xiaosong WANG,Zhongren WANG,Shijian YUAN

Journal Article

Time-domain and frequency-domain approaches to identification of bridge flutter derivatives

Zhengqing CHEN

Journal Article

The Application of Comprehensive Service Flying Hour to the Failure Analysis of Corrosion Fatigue Life

Lin Ming,Jin Ping,Sun Mingli

Journal Article

Digitalization optical open loop test system for fiber optic gyroscope

ZHANG Deng-wei, SHU Xiao-wu, MU Xu-dong, LIU Cheng

Journal Article

A new procedure combining GC-MS with accelerated solvent extraction for the analysis of phthalic acid

Tingting MA, Ying TENG, Peter CHRISTIE, Yongming LUO, Yongshan CHEN, Mao YE, Yujuan HUANG

Journal Article

Precast steel–UHPC lightweight composite bridge for accelerated bridge construction

Shuwen DENG, Xudong SHAO, Xudong ZHAO, Yang WANG, Yan WANG

Journal Article