Fracture properties investigation of Artocarpus Odoratissimus composite with Polypropylene (PP)

Wood plastic composites (WPC) were done using a matrix of polypropylene (PP) thermoplastic resin with wood fibre from Artocarpus odoratissimus as filler. The purpose of this study is to investigate the fracture properties of Artocarpus odoratissimus composite with PP. The WPC was manufactured by a hot - press technique with varying formulations which are 10:0 (100% pure PP), 50:50 (40 g of wood fiber and 40 g of PP) and 60:40 (48 g of wood fiber and 32 g of PP). The mechanical properties were investigated. Tensile and flexural were carried out according to ASTM D 638 and ASTM D 790. The results were analysed to calculate the tensile strength. Tensile strength at break is ranged from 13.2 N/mm2 to 21.7 N/mm2 . While, the flexural strength obtained is varying from 14.7 N/mm2 to 31.1 N/mm2 . The results of the experiment showed that tensile and flexural properties of the composite increased with the adding of wood fiber material. Finally, the Scanning Electron Microscope (SEM), have been done to study the fracture behaviour of the WPC specimens

Compression behaviour of bio-inspired honeycomb reinforced starfish shape structures using 3D printing technology

The bio-inspired structure (e.g., honeycomb) has been studied for its ability to absorb energy and its high strength. The cell size and wall thickness are the main elements that alter the structural ability to withstand load and pressure. Moreover, adding a secondary structure can increase the compressive strength and energy absorption (EA) capability. In this study, the bio-inspired structures are fabricated by fused deposition modelling (FDM) technology using polylactic acid (PLA) material. Samples are printed in the shape of a honeycomb structure, and a starfish shape is used as its reinforcement. Hence, this study focuses on the compression strength and EA of different cell sizes of 20 and 30 mm with different wall thicknesses ranging from 1.5 to 2.5 mm. Subsequently, the deformation and failure of the structures are determined under the compression loading. It is found that the smaller cell size with smaller wall thickness offered a crush efficiency of 69% as compared to their larger cell size with thicker wall thickness counterparts. It is observed that for a 20 mm cell size, the EA and maximum peak load increase, respectively, when the wall thickness increases. It can be concluded that the compression strength and EA capability increase gradually as the cell size and wall thickness increase

Using the morphological chart technique for the design of polymeric-based composite automotive pedals

No Abstract.Discovery and Innovation Vol. 18 (4) 2006: pp. 311-31

Fluid flow and static structural analysis of E-glass versus S2-glass fiber/epoxy reinforced pipe joints

Glass fiber/epoxy reinforced composite pipes are regularly used in the field were circulation of extreme pressured chemical fluids, transfer of industrial wastes, oil and natural gas transmission occurs. In oil and natural gas industry, the heavy crude oil transporting pipe lines are exposed to unsteady pressure waves which generate rise and fall stress levels in the pipes. Computational Fluid Dynamics Analysis was implemented using Ansys 15.0 Fluent software to investigate the consequences of these pressure waves on some detailed joints in the pipes. Relating on the type of heavy crude oil being employed, the flow behaviour stated a significant degree of stress levels in evident connecting joints, causing the joints to become weak over a sustained period of usage. In this analysis comparison of various pipe joints was done by using different material and the end result of the stress volume in the pipe joints were checked so that the life of the pipe joints can be optimized by the change of material

The Effect Of Different Shape And Perforated rHDPE In Concrete Structures On Flexural Strength

This research was carried out to develop a reinforcing structure from recycled HDPE plastic lubricant containers to be embedded in concrete structure. Different forms and shapes of recycled HDPE plastic are designed as reinforcement incorporate with cement. In this study, the reinforcing structure was prepared by washing, cutting, dimensioning and joining of the waste HDPE containers (direct technique without treatment on plastic surface). Then, the rHDPE reinforced concrete was produced by casting based on standard of procedure in civil engineering technique. Eight different shapes of rHDPE in concrete structure were used to determine the concrete's ability in terms of flexural strength. Embedded round shape in solid and perforated of rHDPE in concrete system drastically improved flexural strength at 17.78 % and 13.79 %. The result would seem that the concrete with reinforcing rHDPE structure exhibits a more gradual or flexible properties than concrete beams without reinforcement that has the properties of fragile