A5091820396- Composite Structure Analysis and Optimization
- Structural Load-Bearing Analysis
- Fatigue and fracture mechanics
- Advanced Numerical Analysis Techniques
- Topology Optimization in Engineering
- Structural Analysis and Optimization
- Dynamics and Control of Mechanical Systems
- Numerical methods in engineering
- Structural Health Monitoring Techniques
- Probabilistic and Robust Engineering Design
- Structural Analysis of Composite Materials
- High Temperature Alloys and Creep
- Advanced Numerical Methods in Computational Mathematics
- Metallurgy and Material Forming
- Fire effects on concrete materials
- Structural Response to Dynamic Loads
- Structural Behavior of Reinforced Concrete
- Elasticity and Material Modeling
- Tribology and Lubrication Engineering
- Vibration and Dynamic Analysis
- Contact Mechanics and Variational Inequalities
- High-Velocity Impact and Material Behavior
- Metal Forming Simulation Techniques
- Seismic Performance and Analysis
- Manufacturing Process and Optimization
University of Calabria
2015-2024
University of Calabar
2010
Summary The paper deals with two main advantages in the analysis of slender elastic structures both achieved through mixed (stress and displacement) format respect to more commonly used displacement one: (i) smaller error extrapolations usually employed solution strategies nonlinear problems (ii) lower polynomial dependence problem equations on finite element degrees freedom when solid elements are used. extrapolation produces a number iterations larger step length path‐following greater...
Carbon nanotube/polymer nanocomposite plate- and shell-like structures will be the next generation lightweight in advanced applications due to superior multifunctional properties combined with lightness. Here material optimization of carbon beams shells is tackled via ad hoc nonlinear finite element schemes so as control loss stability overall response. Three types optimizations are considered: variable through-the-thickness volume fraction random nanotubes (CNTs) distributions, randomly...
Abstract In the present paper, formulation proposed by Casciaro and Garcea ( Comput. Meth. Appl. Mech. Eng. , 2002; 191 :5761–5792) applied to shakedown analysis of plane frames, is extended two‐dimensional flat structures in both cases plane‐stress plane‐strain. The discrete obtained using a mixed finite element which stress displacement fields are interpolated. material assumed be elasto‐plastic linearization elastic domain performed. result versatile iterative scheme well suited...
What we call the implicit corotational method is proposed as a tool to obtain geometrically exact nonlinear models for structural elements, such beams or shells, undergoing finite rotations and small strains, starting from basic solutions three-dimensional Cauchy continuum used in corresponding linear modelings.The idea use local description decompose deformation gradient stretch part followed by rigid rotation.Referring this frame can derive, stress tensor provided elasticity, an accurate...
Abstract A mathematical programming formulation of strain‐driven path‐following strategies to perform shakedown and limit analysis for perfectly elastoplastic materials in an FEM context is presented. From the optimization point view, standard arc‐length analyses, recently extended shakedown, are identified as particular decomposition used solve a proximal algorithm applied static theorem that then solved by means convergent sequence safe states. The approach allows: direct comparison with...
Summary The Koiter‐Newton method had recently demonstrated a superior performance for nonlinear analyses of structures, compared to traditional path‐following strategies. follows predictor‐corrector scheme trace the entire equilibrium path. During predictor step, reduced‐order model is constructed based on Koiter's asymptotic postbuckling theory that followed by Newton iteration in corrector phase regain forces. In this manuscript, we introduce robust mixed solid‐shell formulation further...
A plasticity formulation for the Hybrid Virtual Element Method (HVEM) is presented. The main features include use of an energy norm VE projection, a high-order divergence-free interpolation stresses and piecewise constant plastic multipliers within element subdomains. HVEM does not require any stabilization term, unlike classical VEM formulations which are affected by choice parameters. algorithmic tangent matrix derived consistently analytically. standard strain-driven Backward-Euler time...
Abstract The present paper extends the finite element perturbation approach already presented for pin‐jointed and framed structures 15 to rectangular thin plates. Koiter's asymptotic strategy 2 is coupled with a High‐Continuity discretization of plate. 22 consistency discrete model discussed from kinematical numerical points view several tests are reported. It appears that use HC elements makes algorithm insensitive locking phenomenon occurring in evaluation postbuckling behaviour. also...
Summary The Koiter method recovers the equilibrium path of an elastic structure using a reduced model, obtained by means quadratic asymptotic expansion finite element model. Its main feature is possibility efficiently performing sensitivity analysis including posteriori effects imperfections in nonlinear equations. state‐of‐art treatment geometrical accurate only for small imperfection amplitudes and linear pre‐critical behaviour. This work enlarges validity to wider range practical problems...