Optimal Design of Filament Wound Grid-stiffened Composite Cylindrical Structures

Manojkumar Buragohain; R Velmurugan

doi:10.14429/dsj.61.482

Manojkumar Buragohain Advanced Systems Laboratory, Hyderabad
R Velmurugan Indian Institute of Technology Madras, Chennai

DOI: https://doi.org/10.14429/dsj.61.482

Keywords: Filament winding, grid-stiffened shell, lattice cylinder, smeared stiffeners model, buckling

Abstract

An integral account of design and analysis of grid-stiffened cylindrical structures is presented. For convenience, a two-phase approach is adopted. In the initial phase, with a view to arriving at a few initial possible optimal configurations, parametric analysis through smeared stiffeners approach is utilised. The ribs, in a filament wound grid-stiffened structure, introduce several additional design elements that result in many possible design configurations; in the initial phase, these design options are efficiently reduced to a few numbers. Finite element modelling is used in the final design and analysis. Rib material is distinct from normal unidirectional composites and this aspect is inherently accounted for in the modelling approaches considered here.

Defence Science Journal, 2011, 61(1), pp.88-94, DOI:http://dx.doi.org/10.14429/dsj.61.482

Author Biographies

Manojkumar Buragohain, Advanced Systems Laboratory, Hyderabad

Dr Manojkumar Buragohain obtained MTech from IIT Madras in 1992 and PGDFA (CFA) from ICFAI Hyderabad in 2000. He has done PhD from IIT Madras in 2010. Presently he is working as Scientist 'F' at Advanced Systems Laboratory, Hyderabad. His areas of interest include: Geodesic and non-geodesic filament winding of axisymmetric as well as non-axisymmetric components, tape winding, rosette layup and contact lay-up. He has worked for design and development of composite motor casing, grid-stiffened structures, ablative liners, wind mill blade, etc.

R Velmurugan, Indian Institute of Technology Madras, Chennai

Dr R Velmurugan is presently a Professor at the Composites Technology Centre, Department of Aerospace Engineering, IIT Madras, Chennai. He has about 15 years of teaching and research experience He has guided many students for PhD/MS/MTech degree programmes. His areas of interest include: Impact mechanics, structural crashworthiness and nano composites.