Experimental and numerical study of geometrically nonlinear behavior of corrugated laminated composite shells using a nonlinear layer-wise shell FE formulation. (1st April 2019)

• Record Type: Journal Article
• Authors: Soltani, Z.; Hosseini Kordkheili, S.A.; Kress, G.
• Is Part Of: Engineering structures. Volume 184(2019)
• Page Start: 61
• Page End: 73
• Publication Date: 2019-04-01
• Subjects: Geometrically nonlinear analysis -- Corrugated laminated composite shell -- Multi-modulus material -- Prepreg-autoclave process -- Layer-wise shell finite element; Structural engineering -- Periodicals; Structural analysis (Engineering) -- Periodicals; Construction, Technique de la -- Périodiques; Génie parasismique -- Périodiques; Pression du vent -- Périodiques; Earthquake engineering; Structural engineering; Wind-pressure; Periodicals; 624.105
• DOI: 10.1016/j.engstruct.2019.01.077
• Languages: English
• ISSNs: 0141-0296

Abstract

Highlights: Geometrically nonlinear behavior of corrugated laminated shell is investigated. Specimens are made by unidirectional glass/epoxy prepreg and autoclave process. The practical challenges during curing process are discussed. A new technical material model is also adapted to solve the problem numerically. Abstract: This paper presents experimental and numerical studies on the geometrically nonlinear behavior of corrugated laminated composite shells (CLCS) under quasi-static loading along the corrugated direction. A geometrically nonlinear layer-wise shell finite element formulation is adopted to study the behavior of CLCS under large deformation by modeling of incremental different moduli in the tensile and compressive regimes through the thickness, where the spatial location of neutral axis shifts with deformation. A master curve is presented to estimate the value of compressive modulus from given tensile and flexural moduli. Using the prepreg autoclave method, the paper also describes practical challenges in the manufacturing of CLCS and reveals significant influence of thickness on the nonlinear elastic behavior of two thin and moderately thick CLCS. The proprietary layer-wise shell FE formulation is verified with solid-finite-element modeling and employing a developed user material (USERMAT) subroutine in the commercial software ANSYS. Resulting improvements in numerical modelling are assessed in both general and local behaviors.