A layerwise isogeometric approach for NURBS-derived laminate composite shells. (June 2015)

• Record Type: Journal Article
• Authors: Guo, Yujie; Ruess, Martin
• Is Part Of: Composite structures. Volume 124(2015)
• Page Start: 300
• Page End: 309
• Publication Date: 2015-06
• Subjects: Isogeometric analysis -- Laminate composite shell -- Layerwise theory -- Finite cell method -- Interlaminar stresses -- Free edge effects; Composite construction -- Periodicals; Composites -- Périodiques; 624.18
• DOI: 10.1016/j.compstruct.2015.01.012
• Languages: English
• ISSNs: 0263-8223

Abstract

Abstract: Layerwise theories provide an accurate prediction of the three-dimensional stress state of composite structures which is in many cases a prerequisite for a successful prediction of failure mechanism. We focus on such a model for laminate composite plate and shell models in the framework of isogeometric analysis. We apply an exact but dimensionally reduced geometry description based on a computer-aided design (CAD) derived mid-surface NURBS model and a layerwise through-thickness B-spline description. Using the unique and characteristic refinement capabilities of isogeometric analysis we simplify the modeling process while keeping the higher order and higher continuity properties of NURBS. Trimmed geometries, as common in CAD models are efficiently handled by an embedded domain method which treats trimmed areas as a fictitious extension domain in the computational model. We verify our approach with several examples for moderately thick laminate plate and shell models and compare our results to existing 3D solutions.