The commercial finite element program LS-DYNA was employed to evaluate the response and energy absorbing capacity of cylindrical metal tubes that are externally wrapped with composite. The effects of composite wall thickness, loading conditions and fiber ply orientation were examined. The results demonstrate that a wrapped composite can be utilized effectively to enhance the crushing characteri...

composite pressure vessel cng made of epoxy – carbon material with nonmetal liner is 60% lighter than aluminum vessel under the same conditions. one of the important parameters in the pressure vessels design is their resistance against impact and prevention of explosion. in this paper, the effects of low velocity impact on composite pressure vessel are investigated using fe analysis. the vessel...

Given a straight-line drawing Γ of a graph G = (V,E), for every vertex v the ply disk Dv is defined as a disk centered at v where the radius of the disk is half the length of the longest edge incident to v. The ply number of a given drawing is defined as the maximum number of overlapping disks at some point in IR. Here we present a tool to explore and evaluate the ply number for graphs with ins...

In the manufacturing industries, main problem of material handling process using conveyor belt. Belt that continuously work will have damage or failure, so it repair by cold splicing. The purpose this study is to see effect splicing parameters on shear strength belt joints based variations in number belts, bias cut and adhesive thickness. Variations ply belts used are 2 ply, 3 4 0.3xB, 0.6xB 0....

In this research program, a numerical method was developed to predict the progressive failure of a thick laminated composite femoral component for total hip arthroplasty. A 3-D global/local technique was used to capture the overall structural response of this system while also enabling the 3-D ply level stress state to be determined efficiently and accurately. Different failure criteria and dif...

The microcracking process in laminates which have outer-ply 90◦ plies (e.g. [90m/0n]s) has some important differences from the microcracking process in laminates which lack outer-ply 90◦ plies (e.g. [0n/90m]s). Foremost among the differences is the characteristic damage state. [90m/0n]s laminates form antisymmetric or staggered microcracks while [0n/90m]s laminates form symmetric microcracks. T...

This article describes the development of porous two-ply channels for paper-based microfluidic devices that wick fluids significantly faster than conventional, porous, single-ply channels. The two-ply channels were made by stacking two single-ply channels on top of each other and were fabricated entirely out of paper, wax and toner using two commercially available printers, a convection oven an...

The use of composite materials for structures subjected to impacts requires a deep understanding about the dynamic behaviour material. To this end, physically-based computational micromechanics simulation tool has been developed predict failure initiation in ply over wide range strain rates. framework incorporates constitutive models fibre, matrix and fibre–matrix interface, which are partly ca...

Hybridization of natural fiber with synthetic to reinforce polymer matrix composites is an effective way increasing fatigue strength substantial amount bio-based content. Flax the strongest type bast fiber, possessing excellent mechanical and damping properties. Fatigue properties flax hybridized carbon reinforced were studied. inter-ply hybrid flax-carbon composite compared intra-ply through t...