Behavior Of Polypropylene Fiber Based Needlepunched Nonwoven Reinforced Laminated Composites

In the specimens, all showed a brittle fracture due to how the stress vs strain slope looked and where the Ultimate Tensile Strength was located. Also, how the composited specimens failed look consistent that there were any defects in the specimens. The 0°/90° carbon/epoxy specimen failed in the longitudinal direction because of how the fibers were aligned in that direction. The two ±45° glass/ epoxy specimen failed in the 45-degree direction do to how the fibers were aligned in the specimens. These failures would make sense because composites fail when fiber become unconnected so the epoxy failed first and then cause the fibers to fail next. The fibers individual are weak but when are combined and form a pattern with other fibers is how the strength

Due to the assumptions that it demonstrates a linear distribution for plane strains throughout the laminate thickness and that out of plane strains can therefore be ignored.

However, the absence of plastic deformation does not mean that composites are brittle materials like monolithic ceramics. The heterogeneous nature of composites result in complex failure mechanisms which impart toughness. Fiber-reinforced materials have been found to produce durable, reliable structural components in countless applications. The unique characteristic of composite materials, especially anisotropy, require the use of special design

The purpose of this lab was to test four different polymer coupons under a tensile load and determine mechanical properties. This was done under normal circumstances along with the samples soaking in different temperature water baths before being tested. It was found that Nylon 6 was the most brittle sample and that High Impact Polystyrene was the most elastic. It was also found that there is a general trend of materials getting more brittle when colder and more elastic when warmer.

Year after year, new world records are established in the world of athletics, and this progress would not have occurred if it weren’t for the technology that exists, which helps improve athletes performance. One of the first places an athlete’s performance can see improvement is through their equipment. Carbon fiber composites have changed the world of sporting equipment forever, and therefore the world of sports as well. This material improvement allows for advanced and favorable strength and stiffness, in addition to being lightweight and durable—all components of an excellent piece of sporting equipment. While other materials, such as graphite, titanium, and plastics, are common and well liked among sports equipment

Figure 13. Effect of tanδ At 1 Hz Frequency on Polyester Resin and Shorea robusta Composite

It can be concluded that the wool fabric is the best material for a fencing jacket because it depressed the least. The tip of the weapon only depressed 2mm, while the next best material depressed 5mm. The worst material was the denim, which depressed 8mm. This happened because of how different materials are made. Wool, the material that performed the best overall, is made up of 2 strings, one is wound in parallel lines, while the other wind through the parallel strings. This creates a stronger material, since it depressed the least (My Learning, 2016). Also, the wool had a cardboard backing, which is a stiff material that prevented it from pushing in too far. The material, denim, which performed the worst, was made differently. Denim is made

As for ductility, the material with most ductility was found to be the thermoplastic polymer (HDPE). Two tests were conducted on the HDPE samples at different speeds. As a result, the HDPE sample pulled at lower speed exhibited greater ductility. Ductility was calculated by obtaining the percent elongation of each material sample. This correlates with the idea that the material that deforms the most before fracture, possesses greater ductility. The highest percent elongation obtained was 191,

Carbon fiber in all aspects is a material consisting of thin fibers of nearly pure carbon made by subjecting various organic raw materials to high temperatures, combined with asynthetic resins to produce a strong, lightweight material use in construction of aircraft and spacecraft (dictionary 2016). This composite material dates back to the 1950s where the tensile strength of carbon fiber was discovered and put into work. 50 years later carbon fiber is still well used and in great demand as the benefits of it proved to be great for the race car industry. The purpose of this project is to examine the mechanical properties of carbon fiber, and the benefits that it provides to the race car industry as well as predicting what other applications will occur in the

The results demonstrated the various properties of polymers that each reaction produced. For the nylon polymerization, a condensation reaction took place and produced a long, polymer string. As described in Figure 1, the product was clear and several meters long, and the fibers held together when stretched. However, when a portion of the nylon string was heated, fibers weakened. The nylon turned a bright white, and, when the stirring rod was used to move the piece, the string broke in half. Ultimately, the reaction presented the fact that polymers are sensitive to heat and easily thermally decompose. In contrast, for the methyl acrylate polymerization, an addition reaction occurred and produced a soft, white flat wad of polymer substance. The methyl acrylate polymer had the consistency of chewed gum, but tore easily when stretched. Therefore, the reaction revealed that the type of reaction (addition or condensation) plays a key role in determining a polymer’s properties.

Composites, is a material that made with two or more different material. People can see or use it anytime, anywhere. Composite materials can provide different advantages from mixing different materials, and usually combined metal (aluminum), polymers (epoxy) or ceramic (silicon). One of the most common example for the composites will be fishing rod. Nowadays fishing rod usually make with glass fiber/ carbon fiber and epoxy. Which glass fiber or carbon fiber are brittle but strong, and epoxy can provide a high mechanical properties. Result of the fishing rod can be have a better toughness, and lightweight. Because of that in this lab, the main objective is going to use the optical microscopy and find out the fiber’s alignment, the structure pattern and the mechanical properties from the fishing rod.

Cut edges of thermoplastic fibre fabrics could fuse together during cutting due to heat generation in knife blade. Generally, anti-fusion paper comprising a lubricant could be used that lubricates the knife blade as it passes through the spread, therefore reducing the generation of heat in the cutting knife.

A sample realization of the codes for simulating 3D particle reinforced composite is depicted in Figure 3. The results of these efforts have been (and will continue to be) published in peer reviewed journals of science and presented in major engineering conferences. Moreover, methods developed for this research can be made compatible for advancing research in phase-change materials, coatings, tissue engineering, and many more frontiers of science.

Abstract: Advancement in recent years on the efficiency of glass fiber-reinforced polymer (GFRP) in production and cost benefits have increased their use as alternative means to steel rebar in bridge deck bases. The purpose in applying rebar is to increase the tensile strength of concrete. Considering the versatility of bridges there are many factors that need to be analyzed when choosing whether to use steel rebar or GFRP material such as: cost, tensile strength, and weather resistance. Stress-strain graphs were calculated, graphed, and analyzed to determine the yield tensile strength and stiffness of steel rebar and GFRP. Data collected from alkaline bath tests were graphed and analyzed to determine the thermal and corrosion resistance of each material. Costs per square inch of each material were also compared as well as each materials quality and life expectancy. The results of the conducted test analysis found the GFRP to have greater thermal resistance, lower cost, and higher life expectancy than the steel rebar, however the steel rebar’s stiffness was found to be about six times larger than the GFRP’s. These results suggest that the advancements in GFRP can provide longer lasting bridge structures and will change the future of construction and restoration of bridges.

Because of the unlimited number of matrix/ fiber combinations that can be used to form composites, and the great number of variables that can be controlled in composite materials, composites can attain a wide range of mechanical properties. For instance, the mechanical properties depend on the properties of both the matrix and the fiber phases; as that, the