Anurag Dixit

Modeling techniques for predicting the mechanical properties of woven-fabric textile composites: a Review

The paper reviews the past and recent modeling techniques (both analytical and numerical) pertaining to the mechanical behavior of textile-reinforced composites in general and woven fabric textile composites in particular published in the literature. The finite-element analysis of repeating unit cell geometry in association with the homogenization technique proves to be vital in predicting the properties. The purpose of this paper is not only to discuss the different modeling strategies and the mathematics involved, but also to provide the reader with an overview of the investigations conducted.

Finite-Element Analysis of Jute- and Coir-Fiber-Reinforced Hybrid Composite Multipanel Plates

Natural-fiber-reinforced polymer composite materials are rapidly gaining interest worldwide both in terms of research and industrial applications. The present work includes the characterization and modeling of jute- and coir-fiber-reinforced hybrid composite materials. The mechanical behavior of a two-panel plate and a sixpanel box structure is analyzed under various loading regimes by using the finite-element software ABAQUS®. Exhaustive parametric studies are also performed to obtain a clear insight into the relationships between various parameters and deflections of the panels and stress distributions in them. Deflections of both the structures are compared and found to be in good agreement with published results. To determine the mechanical behavior of natural-fiber-reinforced composite panels, a finite-element analysis is performed.

Investigation of the Thermomechanical Behavior of a 2 × 2 TWILL Weave Fabric Advanced Textile Composite

The thermomechanical performance of a 2 × 2 twill weave fabric advanced textile composite was evaluated. The tensile, compressive, and flexural properties of flat beam specimens of the composite were tested at room temperature, in water (24.9 to 96.7°C), and in liquid nitrogen (−96.9 to 99.4°C) by using a high-precision instrument called the dynamic mechanical analyzer (DMA). The storage modulus and tanδ of the carbonfiber-reinforced plastic (CFRP) specimens at various temperatures were evaluated. The scanning electron micrograph (SEMs) of deformed composite specimens revealed their failure mode (fiber pull-out, debonding, crack propagation, delamination, matrix cracking, and kinking of fibers).

Evaluation of Vibration of a Crankshaft and a Driveshaft Using FEM

The present paper is based on comparative studies of modal analysis of a four-cylinder crankshaft and a driveshaft of different materials which includes metals, alloys as well as composites. The five materials chosen for this investigation are steel, gray cast iron, titanium alloy, E-glass/epoxy unidirectional composite and carbon/epoxy unidirectional composite. Modal analysis was carried out on the crankshaft and the driveshaft using commercially available software ANSYS, which solves problems based on linear and nonlinear behavior for obtaining natural frequency and deformation at different modes with different materials. In order to achieve accurate results, the loading and boundary conditions were taken as in the case of real-life situations. Maximum total deformation was achieved by the composites, followed by alloys and finally the metals, with the minimum deformation. The results were then compared by conducting a parametric study, and an alternative material has been proposed from the investigation.

Improving Structure, Properties, and Abrasive Wear Resistance of the Thermally Sprayed Co-Based Coating by Means of La2O3 Addition

Co-based alloy modified with La2O3 is deposited by high velocity oxy-fuel (HVOF) spraying rocess. The microstructure, porosity, hardness, and abrasive wear of the coatings are investigated. The La2O3 addition refines the microstructure, forms new phases, and increases hardness and abrasive wear resistance of the modified coating. The abrasive wear behavior of these coatings is investigated under normal loads 5 and 15 N against 220 abrasive grit size. The abrasive wear is carried out using 30 and 50 m/min sliding rates. The abrasive wear is found to increase with the increase in normal load and sliding rates. Analysis of the worn surfaces by scanning electron microscope images revealed cutting and plowing as the material removal mechanisms in these coatings under abrasive wear conditions used in this research.