Sadik Lafta Omairey, Peter Donald Dunning and Srinivas Sriramula
The purpose of this study is to enable performing reliability-based design optimisation (RBDO) for a composite component while accounting for several multi-scale uncertainties…
Abstract
Purpose
The purpose of this study is to enable performing reliability-based design optimisation (RBDO) for a composite component while accounting for several multi-scale uncertainties using a large representative volume element (LRVE). This is achieved using an efficient finite element analysis (FEA)-based multi-scale reliability framework and sequential optimisation strategy.
Design/methodology/approach
An efficient FEA-based multi-scale reliability framework used in this study is extended and combined with a proposed sequential optimisation strategy to produce an efficient, flexible and accurate RBDO framework for fibre-reinforced composite laminate components. The proposed RBDO strategy is demonstrated by finding the optimum design solution for a composite component under the effect of multi-scale uncertainties while meeting a specific stiffness reliability requirement. Performing this using the double-loop approach is computationally expensive because of the number of uncertainties and function evaluations required to assess the reliability. Thus, a sequential optimisation concept is proposed, which starts by finding a deterministic optimum solution, then assesses the reliability and shifts the constraint limit to a safer region. This is repeated until the desired level of reliability is reached. This is followed by a final probabilistic optimisation to reduce the mass further and meet the desired level of stiffness reliability. In addition, the proposed framework uses several surrogate models to replace expensive FE function evaluations during optimisation and reliability analysis. The numerical example is also used to investigate the effect of using different sizes of LRVEs, compared with a single RVE. In future work, other problem-dependent surrogates such as Kriging will be used to allow predicting lower probability of failures with high accuracy.
Findings
The integration of the developed multi-scale reliability framework with the sequential RBDO optimisation strategy is proven computationally feasible, and it is shown that the use of LRVEs leads to less conservative designs compared with the use of single RVE, i.e. up to 3.5% weight reduction in the case of the 1 × 1 RVE optimised component. This is because the LRVE provides a representation of the spatial variability of uncertainties in a composite material while capturing a wider range of uncertainties at each iteration.
Originality/value
Fibre-reinforced composite laminate components designed using reliability and optimisation have been investigated before. Still, they have not previously been combined in a comprehensive multi-scale RBDO. Therefore, this study combines the probabilistic framework with an optimisation strategy to perform multi-scale RBDO and demonstrates its feasibility and efficiency for an fibre reinforced polymer component design.
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INSEAD, the European Institute for Business Administration, at Fontainebleau, near Paris, offers advanced management education for over 400 students a year, mainly through the MBA…
Abstract
INSEAD, the European Institute for Business Administration, at Fontainebleau, near Paris, offers advanced management education for over 400 students a year, mainly through the MBA course. The Library first set up online access in 1984, and now has extensive online training facilities for students, as well as services for professors, researchers and administrative staff. As demand for online training from students has increased, some professors have encouraged Library online specialists to give brief presentations at the start of courses, helping students to aim their information searching directly towards project needs. In 1987, with pressure on the present three online specialists, we started to explore ways of increasing the participation of staff and student end users in their own searching. More attention was given to existing online menu‐driven systems like Textline, while the growth of professional datafiles on France's Minitel videotex system made it worthwhile to explore their potential as subsidiary search options. In 1988, to develop direct end user searching further, two CD‐ROM workstations were installed, which now offer six disc databases on free access. There has also been an exploration of the role of databases issued on floppy disk as offline alternatives. To help campus users understand the range of database options available, a booklet listing by subject major databases accessible on campus, on both online and offline media, was recently issued. Currently, a prototype simple expert system is being developed from this to help users to move between offline and online searching more easily. The present efforts are aimed at a more user‐oriented information access as the Library prepares to transfer next year to a new building.
This chapter complements the one that appeared as “History of the AIB Fellows: 1975–2008” in Volume 14 of this series (International Business Scholarship: AIB Fellows on the First…
Abstract
This chapter complements the one that appeared as “History of the AIB Fellows: 1975–2008” in Volume 14 of this series (International Business Scholarship: AIB Fellows on the First 50 Years and Beyond, Jean J. Boddewyn, Editor). It traces what happened under the deanship of Alan Rugman (2011–2014) who took many initiatives reported here while his death in July 2014 generated trenchant, funny, and loving comments from more than half of the AIB Fellows. The lives and contributions of many other major international business scholars who passed away from 2008 to 2014 are also evoked here: Endel Kolde, Lee Nehrt, Howard Perlmutter, Stefan Robock, John Ryans, Vern Terpstra, and Daniel Van Den Bulcke.
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Caroline Yeoh, Wilfred How and Victor Sim
The exportability of Singapore’s industrial‐development model to other Asian environments has been one of the hallmarks of the city‐state’s regionalization program, together with…
Abstract
The exportability of Singapore’s industrial‐development model to other Asian environments has been one of the hallmarks of the city‐state’s regionalization program, together with the state‐led, market‐driven intervention that has underscored the citystate’s development strategies. The paper presents an empirical analysis on the portability of this transborder industrialization strategy, and contributes new insights to the discourse on state‐enterprise networks in promulgating transnational entrepreneurial ventures. Empirical evidence from on‐site surveys and interviews in Indonesia, China, Vietnam and India will be presented. Our study concludes that, while the calculated, schematised efforts have been remarkable, this attempt at re‐engineering economic space beyond the city‐state has not fully accounted for the intricacies of either economic, or socio‐political, realities in the host environments.
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Alan Rugman, in the course of his professional career, has not shied away from controversy, whether the issues were international diversification versus internationalization…
Abstract
Alan Rugman, in the course of his professional career, has not shied away from controversy, whether the issues were international diversification versus internationalization, internalization versus use of the external market, double diamonds versus single diamonds or global multinational enterprises (MNEs) versus regional MNEs. Whatever was the bone of contention, he has formulated strong hypotheses and then engaged in empirical work to provide evidence for his position. He has taken the issues to a wide audience – scholarly, government and business. To each group he has hammered the ideas home until he was associated with a position on the issues. In fact, Alan seems to have relished being in the middle of storms of controversy as he beat the drums furiously for what he saw as right regardless of whether he offended others taking an opposite view. The result has been that he has had a huge impact on the field of international strategic management and an influence on government policy and business activity.
Aim of the present monograph is the economic analysis of the role of MNEs regarding globalisation and digital economy and in parallel there is a reference and examination of some…
Abstract
Aim of the present monograph is the economic analysis of the role of MNEs regarding globalisation and digital economy and in parallel there is a reference and examination of some legal aspects concerning MNEs, cyberspace and e‐commerce as the means of expression of the digital economy. The whole effort of the author is focused on the examination of various aspects of MNEs and their impact upon globalisation and vice versa and how and if we are moving towards a global digital economy.