Papers by Keyword: Carbon/Epoxy

Abstract: A three-dimensional parametric model was employed to recreate the free response laminated composite plate constructed from different materials. Simulation of the modal analysis is powerful when extreme localized modes are of problem, and it demands dependable material structural models along with correct modelling methodologies. A classical theory-based finite element approach was created to explore the effect of material attributes upon the natural vibration behavior for thin laminated plates. The approach was validated using three-dimensional deformation findings and also achieved based on the theory's results with those derived from commercial programs, including Solidworks. The results obtained from software are in good agreement for some cases and significantly differ for free vibration and is highly dependent on the material properties and boundary conditions. For simply supported boundary condition, the results showed that the maximum fundamentals frequency was 1808.5Hz Hz for the carbon/epoxy material. An established computational technique, depending on finite element method, has been proposed for the computation of free vibration in reinforcement laminated composite components. a good result for estimate the natural frequency and mode shape.

Abstract: In this study, the Interlaminar shear strength (ILSS) and flexural properties for five different laminate orientations [0°, 45°, [45°/-45°/45°]_s, [±45°/0°/90°]_s and 90°] of unidirectional carbon fiber reinforced plastic (CRP) and glass fiber reinforced plastic (GRP) composites are investigated. The different approach is used by applying the tensile load on notched specimens for measuring the inter-laminar shear strength. The theoretical flexural properties are obtained using the classical laminate theory [CLT]. The good agreement is obtained between the theoretical model and experimental results. The results indicate that the flexural strength and stiffness are higher for 0° laminate whereas flexural strain is higher for [45°/-45°/45°]_s laminates as compared to other laminates. The scanning electron microscopy is used to observe the fracture surface of all laminate orientations of CRP and GRP composites.

Abstract: Leaf Springs find its applications in most of the automobiles, In this paper a Finite element Analysis was done on a leaf spring model. The results were verified using the analytical values. Two different alternative materials were used to replace the steel. A comparative study was done on how the results change with the input parameters and also with the usage of alternative materials.

Abstract: Compressive stress-strain characteristics of carbon/epoxy laminated composites in the through-thickness direction at strain rates of over 1000/s were evaluated using the standard split Hopkinson pressure bar. Three carbon/epoxy laminated composites (i.e., unidirectional, cross-ply and woven) with almost the same thickness were tested at room temperature. Small solid cylindrical specimens were machined such that the direction of the compression loading was perpendicular to the fiber direction of the laminates. The effects of strain rate and reinforcement geometry on the secant modulus at 1% strain, ultimate compressive strength and strain, and total strain energy to failure were examined in detail.