Optimal design of beam reinforced composite structures under elasto-plastic loading conditions

• Type: Article in International Scientific Journal
• Date: 2000

Authors

Carlos Conceição António (Author) FEUP; José Trigo Barbosa (Author) FEUP; L. Simas Dinis (Author) Other

Journal

Title: Structural and Multidisciplinary Optimization

Vol. 19 No. 1

Pages: 50-63

ISSN: 1615-147X

Publisher: Springer Nature

Indexing

ISI Web of Knowledge - 14 Citations

Scopus - 13 Citations

Other information

Authenticus ID: P-001-0SA

DOI: 10.1007/s001580050085

Abstract (EN): A design optimization process for elastoplastic material behaviour of laminate composite structures, made of thermoplastic resins; is described. The approach considers two optimization levels. At the first level the geometric linear behaviour under elasto-plastic loading conditions is adopted in order to obtain the optimal solution as a function of ply angles of the plates or shallow shells. At this stage the objective is to recover the plastic zones using only the anisotropic material properties. At the second level the ply thickness of the plates or shallow shells and the height and width of the reinforcement beams are changed to structure weight minimization, under the constraints of maximum allowed displacement or maximum strain-stress level related with amount of plastic zone, without structural plastic collapse or geometric instability in plastic loading conditions. It is expected that contradictory objectives, as minimum elasto-plastic energy and structural weight, are satisfied.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 14