Papers by Keyword: Impact Strength

Abstract: The aim of this research seeks to investigate the mechanical properties of Borassus flabellifer (Borassus palm) and Carica papaya (papaya) hybrid composites fibers reinforced in regards to strength, stiffness, and toughness under different test conditions. It also compares the performance of hybrid composites with composites based on individual fibers. The study involves two groups of composite materials. Group 1. The analysis of ultimate tensile strength of Borassus palm and Carica papaya composite value is 17.020 N/mm². Group 2. The analysis of impact strength of Borassus palm and Carica papaya composite value is 0.35. The hybrid composites, made from Borassus palm and papaya fibers are have very good Tensile and impact strength. That can be an alternative to synthetic fibers. In this study it observed that the hybrid composites, made from Borassus palm and papaya fibers are very suitable for mechanical applications.

Abstract: The aim of this study of mechanical behavior of these composites under tensile and impact loading and their applicability to real applications is the goal. Group 1 The ultimate tensile strength of Ficus religiosa stem fiber is 11.939[N/mm²]. Group 2 ultimate strength of sisal fiber is 9.006 [N/mm²]. As indicated by the results, sisal fibers significantly enhanced the impact resistance and tensile strength of composite materials, therefore they are viable to apply in various engineering application. displayed promise as an inherent composite with limited mechanical potential, as indicated by its good tensile and impact strength.

Abstract: Everyone now lives in a technologically highly hybridised environment; mobile technology is regarded as one of the most significant of all technologies. Inside the phone is the entire world. This article primarily focuses on recycling e-waste into composites (especially waste from mobile phones). The range of products used for this study included basic and smartphones. The primary product chosen was the display glass from smartphones. With the use of recent literature reviews, the problem was identified. Many studies focused on polyester resins with ceramic powders and their composites. The mobile display powder has been mixed with Polyester resin. The mobile phone display electronic waste (MPDEW), like polyester resin, was cost-effective. Mobile phone waste was used as filler in various proportions including 0, 5 and 10 %. To determine the effect of e-waste with polymer composites, the mechanical properties such as tensile, compression, flexural, and impact were undertaken. The scanning electron microscope was also used for the microstructural analysis.

Abstract: Shear thickening fluids (STF) viscosity significantly increases when subjected to an external dynamic load. Recent advances show their potential for engineering applications, such as developing shock absorbers and impact energy-absorbing structures. There is a search for sustainable materials for several applications due to the critical need to replace nonrenewable raw materials. Cork is a sustainable material reported to be an excellent alternative to synthetic energy absorbers thanks to its cellular microstructure and cell wall composition. This work explores the development of cork-STF composites designed for impact energy mitigation. The cork-STF composites were manufactured by compression moulding, exploring different compositions of both materials. Additionally, the manufactured compounds were characterized by submitting samples to impacts. The results made it possible to conclude that deagglomeration occurs for STF concentrations higher than 20%. On the other hand, good results were achieved with compounds that have less than 20% of STF in their composition and can withstand impact loading. Therefore, the energy absorption of white cork agglomerates decreases with STF. Nevertheless, the agglomeration was successful, and this design can be adapted for other specific purposes, applications, or even strain rates than the ones explored in this work.

Abstract: The methodology has been developed to show the functional connection of the impact strength of the heat-affected zone metal of welded joints with weld deposit thickness and, accordingly, with the consumption of welding materials during electric arc welding while constructing and repairing various metal structures and pipeline systems operating in conditions of low climatic temperatures. To reach the objective of the paper, rational intervals of cooling rates of the HAZ metal during welding low-alloy pipe steels were used, and the calculated dependences from the existing works were modified. The methodology allows increasing cold resistance of welded joints of steels of mass use by regulating the weld deposit thickness and welding consumables during electric arc welding while constructing and repairing various metal structures and pipeline systems operating in extreme conditions of the North.

Abstract: Kevlar is commercial brand of fibers supporting para-aramids of light weight for major part of composite. It is applicable in robotics and automobile sectors where parts need to possess high tensile strength and excellent fatigue resistance. Carbon fibers are processed by thermal conversion of organic fiber with low Carbon content such as polyacrylonitrile (PAN) which contain around thousands of filaments. In the current work, samples are produced through Mark Two 3D printer and subjected under investigation for improving mechanical performance in evaluating tensile, flexural and impact behavior as per ASTM Standards. The differentiation is presented by finding the error between experiment and simulation results.

Abstract: Studying the effects of hybrid reinforcement made of nano-zirconium oxide and chopped glass fibers for poly methyl methacrylate (PMMA) denture bases, nano- ZrO₂ (n ZrO₂) at grain sizes (46.7 nm) which measured using Atomic Force Microscopy (AFM) and different ratios on the mechanical characteristics was the aim of this study .To make the pure sample, a 2:1 powder to liquid ratio of typical acrylic resin was used. Hybrid composites with varying concentrations of nano-ZrO2 (nZrO₂) and glass fiber (GFs) (2.5%nZrO₂+2.5% GFs), (3.5%nZrO₂+1.5%GFs), (1.5%nZrO2+3.5% GFs) were introduced. Mechanical tests as tensile strength, flexural strength, impact strength, shore D hardness are used to learn about the properties of manufactured composites. Antibacterial testing, water absorption, density testing, and thermal conductivity these indicated that composites may be effectively turned into filler material. In addition to X-ray diffraction (XRD), Scanning Electron Microscopy (SEM). The result show increased the mechanical properties of the PMMA denture base material. The tensile strength flexural strength, and impact strength increase for all hybrid ratio and reach maximum value at the concentration (2.5%nZrO₂+2.5% GFs) compared to unreinforced PMMA.While hardness increase and reach maximum value at the concentration (3.5%nZrO₂+1.5% GFs). In addition, thermal conductivity and density, the maximum value at concentration (1.5%nZrO₂+3.5% GFs), as well as water absorption decrease as ratio of nZrO2 increase this shoed in concentration (3.5wt. % nZrO₂ +1.5wt. %, GFs).

Abstract: In this paper the effect of adding natural particles (pomegranate PSP and coconut shell particles CSP ) on unsaturated polyester matrix UPE reinforced with natural sisal fibers studied, some mechanical properties were performed. The natural particle percentage selected to be (5, 10, 15, 20) wt. %, while the percentage of the sisal fibers was constant (2wt. %). The main purpose was to improve UPE properties to be use in structural applications. Chemical treatment was perform on all the reinforcement materials used before the hybrid composite synthesis. Using particles size distribution (PSD) it was found that (2956.9 and 2961.6) nm were the size of PSP and CSP, respectively. Then, samples were prepared in the laboratory at room temperature using Hand-layup technique. Tests as Flexural strength, flexural modulus, impact strength, max shear strength and surface roughness were applied on the composite samples. Results were as follows: a clear improvement in the mechanical properties of the UPE reinforced with sisal fibers. As for the fiber-particle reinforced polyester (UPE) ,the results were an increase in the flexural modulus by 5wt.% when adding coconut particle, while it decreased when adding pomegranate particle at same ratio. As for the flexural strength when the adding particles ratio increases, it decreases in the case of pomegranate particles addition while increases in the coconut particles addition. Interestingly, impact strength value increased at 5wt.% for both particle addition, while for further ratio there was a value reduction. An increase in max shear strength was also found as the highest value was in the pomegranate matrix at 5wt.%, while it was in the coconut matrix at 20wt.%. Finally, that the surface roughness value gradually increases with the increase additive ratio. Also, SEM

Abstract: Standard fibers have attracted the attentiveness of technocrats, specialists, experts, and researchers throughout the globe as elective support for fiber built up polymer composites, due to their predominant properties like high explicit strength, low weight, minimal expense, truly incredible mechanical properties, non-grating, eco-accommodating, and bio-degradable qualities. Here of view, a short survey has been completed to utilize normal strands, (for example, jute, Kenaf, pineapple, sisal, and so forth) bounteously accessible in India. Glass Fiber Reinforced Polymers are blending in with normal filaments to build Engineering and Technology applications. This paper presents an examination of the mechanical characteristics of regular fibers and hybrid fibers supported by polymer composites. Seven Sample composite covers of the various mix without alkali treatment has been prepared. The physical, Mechanical properties need to reveal for the better composition of the reinforced elements as per ASTM standard. The specimen has been prepared as per ASTM Standard for Mechanical Characterization. The tensile strength of the hybrid specimen shows maximum ultimate tensile strength 97.24Mpa with yield tensile strength is 67.11Mpa and Young’s Modulus 6673.64Mpa at maximum force of 6.56 KN. This is the highest among all configurations. From the consolidated result of flexural strength of all seven combinations, it is come to notice that, the flexural strength of the hybrid specimen composite shows maximum flexural strength 207.84 MPa. It is observed that the impact strength of the hybrid material is 42% more than Kenaf and E-glass material combination and 54% more than the Jute and E-glass material combination.

Abstract: Denture base made of heat-cured acrylic resin can be sometimes fractured easily during impact such as falling while cleaning it. This study aimed to evaluate the impact strength of heat-cured acrylic resin added with banana (Musa acuminata Linn.) stem fiber of 0.5%, 1%, 1.5% by weight. A total of 32 plate-shaped specimens of heat-cured acrylic resin measuring 65 x 10 x 2.5 mm were divided into 4 groups, group I as control (without addition of banana stem fiber), group II (with addition of 0.5% banana stem fiber), group III (with addition of 1% banana stem fiber), and group IV (with addition of 1.5% banana stem fiber), then the impact strength test was performed using a Charpy Impact Tester. The result shows that the impact strength were increased from group I to group IV and the data obtained were analyzed statistically using One Way ANOVA and post hoc LSD test (p <0.05). The data showed significantly results of the impact strength value with group IV as the highest among all groups, and an increase in impact strength occurred along with increase in the percentage of fiber added to the heat-cured acrylic resin. Based on the results, banana stem fiber has the potential as heat cured acrylic resin reinforcement materials.