Vol. 3, No. 9, 2008

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Analysis of impact response and damage in laminated composite shell involving large deformation and material degradation

Surendra Kumar

Vol. 3 (2008), No. 9, 1741–1756

A nonlinear finite element analysis of impact response and impact-induced damage in curved composite laminates subjected to transverse impact by a foreign object is carried out. An eight-noded isoparametric quadrilateral shell element incorporating a nonlinear strain displacement relation due to large deflection is developed based on the total Lagrangian approach. The nonlinear system of equations is solved using a Newton–Raphson incremental-iterative method. Example problems of graphite/epoxy cylindrically curved laminates with different curvature are considered and the influence of geometrical nonlinearity on the impact response and the resulting damage is demonstrated. The concurrent effect of material degradation due to impact damage is also investigated.

finite element analysis, geometric nonlinearity, eight noded quadrilateral shell element, composite shell, impact, material degradation
Received: 23 July 2008
Revised: 2 November 2008
Accepted: 13 November 2008
Published: 1 November 2008
Surendra Kumar
Council of Scientific and Industrial Research
Centre for Mathematical Modelling and Computer Simulation
NAL Belur Campus
Bangalore, Karnataka 560037