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Whole-life Thinking and Engineering the Future

Roger Flanagan

Frontiers of Engineering Management 2014, Volume 1, Issue 3, Pages 290-296 doi: 10.15302/J-FEM-2014040

Abstract: Whole-life thinking for engineers working on the built environment has become more important in a fastWhole-life thinking is not new, every project attempts to balance the initial capital cost with the operatingSystems thinking provides one approach to developing a more robust whole-life approach.New approaches are needed to produce more reliable whole-life predictions.Best value, rather than lowest cost, can be achieved by using whole-life appraisal as a part of the design

Keywords： whole-life thinking systems thinking complexity chaos risk management through life

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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 nonbaseline

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

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Comparison on End-of-Life strategies of WEEE in China based on LCA

Bin Lu, Xiaolong Song, Jianxin Yang, Dong Yang

Frontiers of Environmental Science & Engineering 2017, Volume 11, Issue 5, doi: 10.1007/s11783-017-0994-7

Abstract: It becomes an urgent issue to develop and adopt an effective End-of-Life (EoL) strategy for EEE in orderEoL strategies for EEE in China need to be evaluated in environment and resources aspects from the lifeLife Cycle Assessment (LCA) is applied to assess the environmental impacts of different EoL scenarios

Keywords： End-of-Life Waste electrical and electronic equipment Life cycle assessment Reuse

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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 highreliability, long life, and small sample.In this study, a Bayes model is proposed to estimate the residual life of products by fusing expert knowledgeeffectiveness and practicability of the proposed method are validated by comparing it with residual life

Keywords： residual life estimation Bayes model linear Wiener process

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A comparison of production system life cycle models

Rajesh ATTRI, Sandeep GROVER

Frontiers of Mechanical Engineering 2012, Volume 7, Issue 3, Pages 305-311 doi: 10.1007/s11465-012-0332-5

Abstract: Hence, analyzing different life cycle models of the production system is necessary.In this paper, different life cycle models of the production system are compared to evaluate the distinctiveFurthermore, the difference between product life cycle and production life cycle is summarized, and theeffect of product life cycle on production life cycle is explained.Finally, a production system life cycle model, along with key activities to be performed in each stage

Keywords： production system life cycle model product

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General framework for bridge life cycle design

Junhai MA, Airong CHEN, Jun HE

Frontiers of Structural and Civil Engineering 2009, Volume 3, Issue 1, Pages 50-56 doi: 10.1007/s11709-009-0004-7

Abstract: Based on a detailed illustration for bridge life cycle design which comprises the processes of servicelife design, aesthetics design, performance design, environmental and ecological design, inspection,maintenance and repair design as well as cost analysis, this paper presented a general framework for bridge life

Keywords： bridge whole life design design phase design process general framework

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Chemically triggered life control of “smart” hydrogels through click and declick reactions

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 9, Pages 1399-1406 doi: 10.1007/s11705-022-2149-z

Abstract: The degradation of polymeric materials is recognized as one of the goals to be fulfilled for the sustainable economy. In this study, a novel methodology was presented to synthesize multiple highly cross-linked polymers (i.e., hydrogels) through amine–thiol scrambling under mild conditions. Amine-terminated poly(ethylene glycol) (PEG-NH₂) was reacted with the representative conjugate acceptors to synthesize hydrogels in organic and aqueous solutions, respectively. The materials above exhibited high water-swelling properties, distributed porous structures, as well as prominent mechanical strengths. It is noteworthy that the mentioned hydrogels could be degraded efficiently in hours to release the original coupling partner, which were induced by ethylene diamine at ambient temperature through amine-amine metathesis. The recovered PEG-NH₂ reagent could be employed again to regenerate hydrogels. Due to the multiple architectures and functions in polymeric synthesis, degradation and regeneration, a new generation of “smart” materials is revealed.

Keywords： hydrogels degradation synthesis regeneration

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State-of-the-art applications of machine learning in the life cycle of solid waste management

Frontiers of Environmental Science & Engineering 2023, Volume 17, Issue 4, doi: 10.1007/s11783-023-1644-x

Abstract:

● State-of-the-art applications of machine learning (ML) in solid waste (SW) is presented.

Keywords： Machine learning (ML) Solid waste (SW) Bibliometrics SW management Energy utilization Life cycle

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Service life prediction of fly ash concrete using an artificial neural network

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 3, Pages 793-805 doi: 10.1007/s11709-021-0717-9

Abstract: Finally, a mathematical formula is proposed that can be used to successfully estimate the service life

Keywords： concrete fly ash carbonation neural networks experimental validation service life

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An updated review and conceptual model for optimizing WEEE management in China from a life cycle perspective

Xiaolong Song, Jingwei Wang, Jianxin Yang, Bin Lu

Frontiers of Environmental Science & Engineering 2017, Volume 11, Issue 5, doi: 10.1007/s11783-017-0985-8

Abstract: subsidies, the gap in the supervision scope, the homogenization of recycling industry and the lack of lifeFinally, a conceptual framework for integrated management of WEEE is proposed from a life cycle perspectiveOverall, the life cycle management of WEEE includes three aspects: developing life cycle informationfor decision-making, implementing life cycle engineering with life cycle tools, and improving WEEE legislationbased on life cycle thinking.

Keywords： Waste electrical and electronic equipment E-waste Life cycle management China

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Creep life assessment of aero-engine recuperator based on continuum damage mechanics approach

Frontiers of Mechanical Engineering 2022, Volume 17, Issue 4, doi: 10.1007/s11465-022-0702-6

Abstract: The creep life of an aeroengine recuperator is investigated in terms of continuum damage mechanics byeffects of the manifold wall thickness and creep properties of brazing filler metal on the operating lifeThe creep life of the recuperator meets the requirement of 40000 h continuous operation when the wallenhancement of the creep strength of the brazing filler metal presents an obvious effect on the creep life

Keywords： creep life assessment brazed joint continuum damage mechanics aeroengine recuperator

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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, considering the actual operation of the fuel cell vehicle. The proposed method includes 7 working conditions: open circuit voltage (OCV), idling, rated output, overload, idling-rated cycle, idling-overload cycle, and OCV-idling cycle. The experimental results indicate that the proposed method can effectively destroy the MEA in a short time (165 h). Moreover, the degradation mechanism of MEA was analyzed by measuring the polarization curve, CV, SEM and TEM. This paper may provide a new research direction for improving the durability of fuel cell.

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

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Clustering economic sectors in China on a life cycle basis to achieve environmental sustainability

Sai LIANG, Tianzhu ZHANG, Xiaoping JIA

Frontiers of Environmental Science & Engineering 2013, Volume 7, Issue 1, Pages 97-108 doi: 10.1007/s11783-012-0402-2

Abstract: hierarchical cluster analysis, this study clusters China’s economic sectors and determines their priority on a life

Keywords： cluster analysis input-output model life cycle material flow analysis sustainable development

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Assessment of fatigue life of remanufactured impeller based on FEA

Lei XU,Huajun CAO,Hailong LIU,Yubo ZHANG

Frontiers of Mechanical Engineering 2016, Volume 11, Issue 3, Pages 219-226 doi: 10.1007/s11465-016-0394-x

Abstract:

Predicting the fatigue life of remanufactured centrifugal compressor impellers is a critical problemA fatigue life simulation model was built, and fatigue life was analyzed based on the fatigue cumulativeproviding a high-precision prediction, the simulation results were useful for the analysis of fatigue lifeResults showed that the load amplitude greatly affected fatigue life, the impeller was protected fromrunning at over-speed, and the predicted fatigue life was satisfied within the next service cycle safely

Keywords： remanufactured impeller fatigue life impeller failures finite element analysis (FEA)

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Carbon emission analysis of a residential building in China through life cycle assessment

Yin ZHANG,Xuejing ZHENG,Huan ZHANG,Gaofeng CHEN,Xia WANG

Frontiers of Environmental Science & Engineering 2016, Volume 10, Issue 1, Pages 150-158 doi: 10.1007/s11783-014-0684-7

Abstract: In this paper, a quantitative life cycle model for carbon emission accounting was developed based onthe life cycle assessment (LCA) theory.use and maintenance phase and material production phase are the most significant contributors to the lifeinfluences in LCA, including the thickness of the insulating layer and the length of building service lifeof a building increases, its carbon emissions during the whole life cycle will rise as well but its

Keywords： life cycle assessment carbon emission factor influence analysis