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Publikācija: Benchmarking of FE Post-Buckling Analysis of Stiffened Composite Panels with Experimental Validation

Publication Type Conference paper
Funding for basic activity Unknown
Defending: ,
Publication language English (en)
Title in original language Benchmarking of FE Post-Buckling Analysis of Stiffened Composite Panels with Experimental Validation
Field of research 2. Engineering and technology
Sub-field of research 2.1. Construction and transportation engineering
Authors Edgars Eglītis
Kaspars Kalniņš
Keywords postbuckling benchmarking, stiffened composite panels, buckling, postbuckling
Abstract Fibrous composites are now gradually replacing traditional steel and alloys in lightweight structural designs because of their unique weight/performance ratio and vast choice of mechanical properties. However, these composites may have no plastic deformation phase that is typical for metals, and therefore buckling load does not necessarily means ultimate load that stiffened composite panels can bear. Allowing stiffened composite panels to enter post-buckling state can significantly reduce weight of aircraft or other lightweight structures in the near future. This requires accurate and fast calculation methods for structural sizing and design optimization. The aim of current study is to benchmark commercially available non-linear finite element (FE) software capabilities for post-buckling analysis of stiffened composite panels. Thus several models have been created using ANSYS, ABAQUS and LS-DYNA FE packages and the analysis results have been experimentally validated. Evaluation of these modeling issues has been performed comparing accordance to experimental data, computational time and applicability for further optimization procedure with response surface method and design of computer experiments.
Reference Eglītis, E., Kalniņš, K. Benchmarking of FE Post-Buckling Analysis of Stiffened Composite Panels with Experimental Validation. In: Proceedings of 4th International Conference "Strength, Durability and Stability of Materials and Structures (SDSMS’04)", Lithuania, Palanga, 11-13 September, 2007. Kaunas: Technologija, 2007, pp.20-20.
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