Constrained shape optimization of free-form shells considering material creep

Shape optimization is an effective tool for designing free-form structures for a variety of design objectives. Aiming at long-term structural performance, a computational framework is presented for performing shape optimization of free-form shells while considering material creep. The material creep...

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Bibliographic Details
Published inEngineering optimization Vol. 54; no. 10; pp. 1787 - 1800
Main Authors San, Bingbing, He, Haiyun, Feng, Dongming, Qiu, Ye, Huang, Yanting
Format Journal Article
LanguageEnglish
Published Abingdon Taylor & Francis 03.10.2022
Taylor & Francis Ltd
Subjects
Algorithms
Constraints
Creep (materials)
creep effect
Finite element method
Free form
Free-form shells
gradient-based method
Mathematical models
Shape optimization
Viscoelastic materials
viscoelasticity
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ISSN0305-215X
1029-0273
DOI10.1080/0305215X.2022.2061478

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Summary:Shape optimization is an effective tool for designing free-form structures for a variety of design objectives. Aiming at long-term structural performance, a computational framework is presented for performing shape optimization of free-form shells while considering material creep. The material creep model is incorporated into a gradient-based optimization algorithm using a viscoelastic finite element model. Non-uniform rational B-spline (NURBS) is employed to parameterize the free-form geometric shapes of shells. Optimization is conducted for minimizing the shell volume subject to constraints of specified maximum displacement. The results demonstrate that it is necessary to consider creep when designing shells made of viscoelastic materials for long-term performance.
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ISSN:0305-215X
1029-0273
DOI:10.1080/0305215X.2022.2061478