Reliability Assessment of Light Weight Components

A special issue of Metals (ISSN 2075-4701).

Deadline for manuscript submissions: closed (15 August 2019) | Viewed by 4674

Special Issue Editors


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Guest Editor
Department of Laser Processing and Structural Assessment, Institute of Materials Research, Materials Mechanics, Helmholtz-Zentrum Geesthacht, Germany
Interests: laser welding and processing of metallic materials; laser shock peening; residual stress engineering; additive manufacturing; fatigue and fracture of materials and structures
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Guest Editor
Department of Financial Engineering and Management, School of Engineering, University of the Aegean, Chios, Greece
Interests: mechanical behavior of engineering materials; experimental fracture mechanics; alloy design for aeronautical applications; casting of aluminum alloys, corrosion of steels and aluminum alloys; nano-reinforcement of polymeric and composite materials

Special Issue Information

Dear Colleagues,

The main challenge in the transportation industry in achieving weight reduction and an increase of passenger safety which can be directly addressed by the development of multi-material load-bearing components and structures with improved performance for structural integrity and durability. Innovative structural designs can be implemented using advanced materials, as well as efficient joining and manufacturing concepts. An assessment of the structural integrity of components and structures is a key for achieving the industrial maturity of the exploited materials and innovative manufacturing technologies. At that time, the assessment of structural integrity is of paramount importance to ensure safety for any engineering industry.

Further gains in structural performance can be achieved through the application of local modification technologies. This can be done by either imposing residual stress fields or strengthening elements, which mitigate crack initiation and/or growth. For example, in aircraft components and engines, emphasis has to be placed by developing strategies for life extension of ageing aircrafts in order to ensure structural safety beyond design lifetime.

Meeting the challenges in structural integrity is the focus of research articles within the Special Issue “Reliability Assessment of Light-Weight Components”. The issue aims at a broad coverage of structural integrity issues, including material characterization from the fatigue and fracture point of view, numerical modelling of those phenomena in materials and structural applications, failure analysis methodologies and structural integrity evaluation criteria. Topics of research articles can include, but are not limited to:

  • reliability and integrity of metallic components and structures
  • structural integrity issues for welded and additive manufactured components and structures
  • probabilistic approaches to damage tolerance assessment
  • fatigue life prediction methodologies for metallic components and structures
  • surface engineering approaches and failure resistance improvement
  • durability and life extension of metallic components and structures
  • residual stress engineering for damage tolerance improvement and life extension
  • life extension and repair of metallic components and structures
  • advanced testing and evaluation techniques
  • advances in fracture mechanical analysis

Dr. Nikolai Kashaev
Prof. Nikolaos Alexopoulos
Guest Editors

Manuscript Submission Information

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Keywords

  • Fatigue crack growth
  • Residual strength
  • Fracture and damage
  • Damage tolerant design
  • Damage tolerance assessment
  • Residual stress engineering
  • Fatigue life prediction
  • Fatigue life extension
  • Simulation of fatigue crack propagation
  • Surface engineering

Published Papers (1 paper)

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Research

19 pages, 3052 KiB  
Article
A Methodology to Evaluate the Reliability Impact of the Replacement of Welded Components by Additive Manufacturing Spare Parts
by Armando Coro, Luis María Macareno, Josu Aguirrebeitia and Luis Norberto López de Lacalle
Metals 2019, 9(9), 932; https://doi.org/10.3390/met9090932 - 26 Aug 2019
Cited by 40 | Viewed by 4189
Abstract
This article shows a method for inspection scheduling of structures made by additive manufacturing, derived from reliability function evaluations and overhaul inspection findings. The routine was an adaption of an existing method developed by the authors for welded components; in this latter case, [...] Read more.
This article shows a method for inspection scheduling of structures made by additive manufacturing, derived from reliability function evaluations and overhaul inspection findings. The routine was an adaption of an existing method developed by the authors for welded components; in this latter case, the routine used a stochastic defect-propagation analysis for pores and lack of fusion defects of additive manufacturing process, instead of the weld liquation crack. In addition, the authors modified the specific stress-intensity factor for welded components to consider additive manufacturing-related material property variability, defect distributions, flaw-inspection capabilities, and component geometry. The proposed routine evaluated the failure rate and inspection intervals using the first-order reliability method (FORM + Fracture) to alleviate the computational cost of probabilistic defect-propagation analysis. The proposed method is one of the first applying reliability concepts to additive manufacturing (AM) components. This is an important milestone, since in 10 years, additive manufacturing is to be used for 30% of the components in aeroengines. This paper presents an example comparing the reliability and cost of a jet engine, with components either made by additive manufacturing or welded parts; in the process, the reliability AM-key features are found, and overhaul schedules of an airplane fleet made with AM components are defined. The simplicity and performance demonstrated in the comparison make the proposed method a powerful engineering tool for additive manufacturing assessment in aeronautics. Full article
(This article belongs to the Special Issue Reliability Assessment of Light Weight Components)
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