Constrained shape optimization of free-form shells considering material creep. Issue 10 (3rd October 2022)

• Record Type: Journal Article
• Authors: San, Bingbing; He, Haiyun; Feng, Dongming; Qiu, Ye; Huang, Yanting
• Is Part Of: Engineering optimization. Volume 54:Issue 10(2022)
• Page Start: 1787
• Page End: 1800
• Publication Date: 2022-10-03
• Subjects: Free-form shells -- shape optimization -- viscoelasticity -- creep effect -- gradient-based method; Engineering design -- Periodicals; Mathematical optimization -- Periodicals; 620.0042
• DOI: 10.1080/0305215X.2022.2061478
• Languages: English
• ISSNs: 0305-215X

Abstract

Abstract : 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.