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Using multilayer laminated composites is often more effective. The primary objective of the test process development and experimental setup was to elucidate the precise causes of damage that occur during the testing of laminated composite specimens. The manufacturing of woven composite material using polyester resin as a matrix reinforced with glass fiber with deferent fiber angles orientations. Woven composite material cut in to specimens and subjected into mechanical tests include tensile, flexural, and impact tests. The result shows that lamina with fiber orientation of 90o has the best results 20KN for tensile, 772,2N for bending, and 149KJ/M2 for impact. Meanwhile the lowest value of tests goes into fiber orientation of 0o with 2.871KN for tensile, 144.6N for bending, and 19.9KJ/M2 for impact. This paper suggest that mechanical properties increases whenever fiber orientations close to 90o orientation. [ABSTRACT FROM AUTHOR]

Because of laminated composites exceptional properties including high strength relative to weight ratio, strongly electrical insulation, and capacity to transmit load, they are being seriously considered to replace traditional materials for structural applications. In a previous study, the effect of layer arrangement on the mechanical properties of multilayered composites was studied and it turned out the setup (GF, KF, and CF) to be the best arrangement. The current study investigates at the way silicon carbide hybridization influences the tension and compression of the epoxy resin composites for the best arrangement. The composites were made using a hand lay-up technique at seven different degrees of reinforcement (2, 4, 6, 8, 10, 12, and 14 percentages of weight (wt%)). The extracted results showed that the tensile load, as well as yield stress for many composites containing silicon carbide nanoparticles increase linearly with particle loading. As particle loading increases, both increase the tension and compression strengths. There are a few abnormalities related to aggregating of nanoparticles with increased particle loading and the creation of micro voids. Even with some nanoparticle percentages (8-10%), notable advancements were achieved in composite mechanical characteristics, higher percentages (>10%) contributed in a lesser amount improvement. A number of preset criteria, involving strain, stress, and displacement distributions have been met by the convergent process of finite element analysis with ABAQUS software. [ABSTRACT FROM AUTHOR]

The current work focuses on the manner in which silicon carbide hybridization affects the impact, bending, and hardness testing of silicon carbide particle-reinforced hybrid epoxy composites. Hand lay-up approach was used to create the composites at seven various levels of reinforcement (2, 4, 6, 8, 10, 12, and 14 weight percentage (wt %). The extracted results showed the weight percentage (10 %) has higher impact strength than the other percentages and so it means absorb more energy than the other recipe due to high impact strength (241.61 N). In flexural test, the weight percentage (10%) of the ideal configurations (GF, KF, and CF) have higher flexural strengths (1.56 KN) compared to other percentages. The results from the experiments and the finite element models coincided well, and the simulations accurately predicted the failure processes in the specimens that were tested under flexural stress and impact. Due to its ability to absorb more energy than they allow a body to transmit, silicon carbide nanoparticles are suitable for body armor and vests used by military and police personnel. [ABSTRACT FROM AUTHOR]

Nano particles are significant in polymers because they increase stiffness, thermal and dimension stability and barrier effect. Through balancing the homogeneity of a nanoparticle inside the composite, the concentration of stress on nanoparticles may be readily decreased. At this point, homogeneity results in improved load transfer ability across particles, which leads to higher ultimate tensile strength. The current work aims to improve the properties of multilayered composites by selecting and incorporating nanofillers into the structure of the matrix. Following that, the nanomodified resin is combined with continuous glass as well as carbon fibers. The addition of nano silica particles to the composite structure significantly improved the mechanical properties. The obtained results of the tensile test demonstrate a region of early linear deformation, followed by a region of small non-linear deformation due to plasticity and final fracture. The specimen could withstand a maximum load of 18.20 kN before breaking apart in the nano silica percent (3%) and minimum load of 13.6 kN in the percent (1%). The compression force of the percent (1%) with (1.85 kN) and percent (3%) and (8%) with (1.84 kN) is larger compared to the other percentages. In fatigue test, the optimum specimen with the percent of (7 %) fails the test at about (569687 cycles). In terms of the force applied throughout the test and the stress that ensues for the optimum configuration, the numerical results agree with the experimental test results. [ABSTRACT FROM AUTHOR]

Recently, the inclusion of nanometer-scaled particles into the polymer matrix has significantly improved the mechanical characteristics of fibrous polymeric composites. The main objective of the present investigation was to determine how the addition of nano silica, affect the mechanical properties of the result components in relation to the applied loading direction, in addition to analyze the effect of combining many fiber layers. This study examines the usage of different fibers containing nano particles as reinforcing materials. The experimental characterization of reinforced composite impact resistant behavior, flexural strength, and hardness was explored in this work. The mechanical behavior of multilayer composites was studied using the addition of nano-silica (SiO2) as reinforcing materials in impact, flexural, and hardness tests. The results obtained indicate the absorbed energy with the percentage of nanoparticles (7 %) having the highest absorbed energy (23.42 J), while the percent (1 %) having the lowest absorbed energy (14.90 J). When compared with the other percentage of nanoparticles, the percent of (5 %) has a larger bending load. Finally, the laminate with (7 %) Nano-particles percent has the most hardness (72.3 HV), whereas the percent (1%) has the lowest hardness value. [ABSTRACT FROM AUTHOR]

As a result of the depletion of natural raw materials, the study focused on finding alternatives, such as making use of industrial waste, incorporating it into composite materials, and analyzing mechanical properties through a variety of tests such as fatigue, comparator, swelling, and aging test. Wasted fiber and crumbed rubber extracted from the recycling of tires in the Al-Diwaniyah tires factory, was added with different concentrations depending on the weight of the reinforcement agent. The results were discussed and compared with the standard recipe that used black carbon, where the results showed an improvement Notable in some of the characteristics of the recipes. The results of mechanical tests (fatigue, aging, swelling, compression) were compared with the standard recipe, a clear improvement was observed in the properties, as it was found that the recipes reinforced with wasted fibers increase the resistance to fatigue failure in concentrations (1,2,3,5) %, to record the longest shelf life (8703) cycle at concentration (5) %, compared with the standard prescription that recorded (8235) cycle, and fails in the other concentrations. While the recipes were reinforced with crumbed rubber, the longest life (9971) cycle was recorded at concentration (3) %, after which it begins to decline. As the swelling test showed, the recipes reinforced with wasted fiber showed an increase in the concentrations (1,2,3,5,10) %, and a decrease in the values of the swelling for the concentrations (15,20,25) %, but the recipes reinforced with crumbed rubber, showed an increase in swelling with the increase of waste amount in all recipes. The study showed that increasing the loading, whether with wasted fibers or crumbed rubber and in certain amounts, the better it was in withstanding and gave acceptable results. All these characteristics combined, give us a clear vision of how to exploit industrial waste in engineering applications with more benefits. [ABSTRACT FROM AUTHOR]

The difficulty of biodegradation of rubber is an important motive for how to make the most of it, so the current work came to develop recipes of rubber composite materials reinforced with industrial waste, and conduct laboratory tests such as abrasion and hardness tests. Two types of industrial waste were used in the preparation of recipes (wasted fiber and crumbed rubber) from the tire recycling process in Al-Dewaniyah Tires factory and these materials were added in different load percentages (1%, 2%, 3%, 5%, 10%, 15%, 20%, and 25%) and all these recipes were discussed with a standard recipe that used carbon black only as a reinforcement agent. The results showed the mechanical properties were improved in some of these recipes. Firstly, the abrasion test results showed imperceptible improvement in this property and then increase with increasing load percentage till 10% of wasted fiber load percent while the acceptable results were till 5% percent of crumbed rubber with value about 4.95% and 7.62% respectively compared with 7.82% for a standard recipe. After these load percent, the property deteriorated. Also, the results showed improving the hardness of recipes with increasing the load percentage for two types of waste material and the load percent 3% may be an acceptable value with 61 IRHD and 60.5 IRHD for wasted fiber and crumbed rubber respectively, was that compatible with some engineering applications. All these results may reflect the ability to use these materials as a reinforcement agent with several benefits such as economic and environmental benefits. [ABSTRACT FROM AUTHOR]

The world is exposed to serious environmental problems as a result of the rapid development of modern technology, which is the increasing rate of tire consumption, the difficulty of its biological decomposition and its accumulation that causes serious fires and the emission of toxic gases harmful to nature and living organisms, The tires act as a basin to collect water, which forms hotbeds for the growth of bacteria and parasites. Therefore, the study focused on finding solutions for how to benefit from and recycle used tires. The (wasted fibers, and crumbed rubber) resulting from recycling were mixed with the composite materials in Al-Diwaniyah Tires Factory, and the mechanical properties (tensile strength, scorch time, cure time, and resilience) were studied in the Babylon Tires Factory. The results were compared with the standard recipe and it was noted that the addition of (fiber scrap, and rubber crumb) at certain percentages (3,5,10) and (3,5) % respectively gave high-performance properties compared to the standard recipe in the majority of the tests that were made. The study showed the economic and environmental benefits of recycling scrap tires and the possibility of exploiting them in many engineering applications as a successful path toward sustainable environmental development. [ABSTRACT FROM AUTHOR]

The current work aimed to demonstrate the reliability of some engineering applications to work under hard conditions and thermal environment, which results in the failure of many engineering structures such as spacecraft components and to benefit from those results in order to achieve the required limits for sustainable development and reach the best results under the influence of those environments. according to extremely high specific stiffness and strength, composite laminates with fiber reinforcement were widely being employed in weight sensitively applications like aeroplanes and spacecraft which are under the influence of transient rectangular and sine pressure pulse loads during launch and in the orbit which consider the highest in the structure. In some situations, a thermo-mechanical transient loads become the dominant loads, and that one of the factors that can influence on the laminate design is their thermal stability. The present work presents a semi-analytical approach (levy-type) by using Matlab 2020 code to examine the effect of fiber orientation on the transient response such as the central deflection as well as normal stress response analysis of doubly curved composite shallow shell exposed to triangular and sinusoidal distributed pressure pulse loading. The results show that various materials, geometric characteristics, boundary conditions and temperature effect have different influences on response parameters. [ABSTRACT FROM AUTHOR]