Papers by Keyword: Tensile Strength

Abstract: This study focused on the valorization of swelling clay from Damniadio. This swelling clay is extracted during construction and dumped in the wild. The aim of this study was to valorize this clay in construction in order to produce bricks strong enough to be used in construction. The physical properties of this clay were evaluated, as well as the mechanical performance of the bricks produced. Finally, a model of a building component was produced using Autocad and Graitec OMD software. Compressive strength and tensile strength values ranged from 1.82 MPa to 30.24 MPa and from 0.14 MPa to 1.83 MPa respectively for raw earth bricks, and from 2.31 MPa to 40.6 MPa and from 0.15 MPa to 2.29 MPa respectively for kiln-dried earth bricks. The modelling of these bricks has thus shown their potential for use as load-bearing structures, making them both more environmentally friendly and more economical in a context where the purchase of concrete will be more expensive than the extraction and processing of clay.

Abstract: Single-lap bonded joints are widely used in aerospace, shipbuilding, and other fields due to their advantages, such as light weight, high specific strength, and no stress concentration caused by hole-making or spot-welding. However, the traditional methods of increasing geometric parameters, such as lap length to improve strength, have limitations in scenarios where the bonding area is restricted. To solve this problem, in this study, it is assumed that carbon fibers with a volume fraction of 10% were introduced into the epoxy adhesive layer and arranged in a 45° orientation. The mechanical non-reciprocity was achieved by utilizing the difference in tensile and compressive moduli. A non-reciprocal cohesive fracture mechanics model of the composite single-lap joint structure based on the User-defined Element (UEL) was established to explore the effect of non-reciprocity on the bonding strength. The results show that the non-reciprocal adhesive layer effectively suppresses the peeling stress concentration at the cohesive failure interface of the adhesive layer, increasing the tensile strength of the single-lap bonded joint by approximately 6.27% compared to the traditional homogeneous adhesive layer, verifying the effectiveness of the model. This research breaks through the limitations of traditional geometric parameter optimization. It can specifically regulate the interfacial stress distribution without changing the bonding area, providing a new material design idea for strength optimization in scenarios where the bonding area is restricted, such as in aerospace. It has important theoretical significance and engineering application prospects.

Abstract: Mg-Al-Zn alloy, an Mg alloy having Al and Zn as the major constituents, is exceptionally lightweight and has potential to become an essential component of modern engineering applications and healthcare systems. This paper presents valuable insights to the friction stir processing (FSP) applied to Mg-Al-Zn alloy in dry conditions. FSP induced extreme plastic deformation in the metal alloy which causes substantial microstructural alterations. These changes were investigated using optical microscope. Microstructural evaluation of FSP-processed zone indicated that average grain diameter of the FSP-processed zone increased in proportion to tool rotating speed. This is attributed to the frictional zone's degree of plastic deformation. In alignment with results obtained from optical microscopy, morphological study conducted using scanning electron microscope (SEM) also demonstrated the synthesis of refined grains. In addition, the study includes evaluation of the FSP-processed alloy's micro-hardness and tensile characteristics in contrast to the base (unprocessed) alloy.

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: Natural fibre composites are gaining importance in engineering and automotive sectors due to their sustainability, lightweight nature, and cost-effectiveness. However, their flexural modulus and other mechanical properties require enhancement to meet industrial standards. This study aims to improve the performance of hybrid composites reinforced with hemp, jute, and coir fibres in an epoxy matrix. Specimens were fabricated using the hand lay-up technique followed by compression moulding and tested according to ASTM standards. Mechanical characterization included hardness, tensile, flexural, compressive, and impact tests, along with water absorption analysis. The results demonstrated significant improvements, with maximum hardness of 80 HRM, tensile strength of 16.95 N/mm², compressive strength of 5.268 N/mm², flexural strength of 95.96 N/mm², and impact resistance of 0.20 J. Water absorption varied between 11.6% and 25%, depending on resin-to-fibre ratios. One-way ANOVA confirmed statistically significant differences among formulations (p = 0.005), validating the effect of fibre–resin composition. The optimal formulation (75% epoxy with balanced fibre reinforcement) achieved superior mechanical performance, establishing hybrid natural fibre composites as a promising eco-friendly alternative to conventional materials.

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: Aim: This research evaluates the strength and stability of hemp, kenaf, and coir fiber reinforced composites produced by compression molding for industrial applications. Materials and Methods: Hemp, kenaf, and coir fibers are blended with a polymer matrix and compression molded. Group 1 (Traditional) This article illustrates the effective fabrication of hybrid fiber. Ultimately stabilized to a medium percentage of resin (75%). Group 2 (Composite) hemp, kenaf & coir blended fiber source more tensile, compressive strength and minimum water absorption rate and wear behavior. Result: The best were the kenaf composites, then hemp water resistance, and they all possessed good thermal stability. Compression molding assisted in enhancing fiber bonding. Conclusion: Compression molding improved the adhesion of fiber and matrix. Kenaf composite exhibited maximum strength, hemp exhibited maximum water resistance, and all of them exhibited good thermal stability.

Abstract: The basic task of packaging is to protect the product from mechanical, physicochemical and biological changes. Inappropriate material and incorrectly selected packaging can significantly affect the qualitative characteristics of the product as well as the shelf life of the packaged content. Packaging materials are chosen based on the characteristics of the product to be packaged, the intended packaging procedure, and the required shelf life of the product. The strictest requirements apply to packaging materials for food and pharmaceutical products. Polymeric materials are used as monomaterials or in combination with other materials. This paper will present the results of testing polymer materials used for the production of food products. Among the characteristics, the results of tests of elongation at break and tensile strength will be presented. The investigated materials were polymer films produced by the coextrusion process (PE/PA/PE and PP/PA/PP) and polymer materials for the production of glasses for dairy products (polystyrene tape, polypropylene compound tape and polypropylene tape with a barrier layer).

Abstract: Ramie fibers as a natural fiber are frequently utilized in fiber-reinforced polypropylene composite preparation due to their remarkable mechanical properties, renewable, and sustainable materials. This research investigated the effect of ramie fiber addition at various compositions on the tensile and impact properties of ramie fiber-reinforced waste polypropylene composites (RFRWPC). Furthermore, a comparative analysis was conducted to assess the potential of ramie fiber as a green reinforcement. In this research, ramie fiber was treated in a 10% NaOH solution at 100 °C for two hours. The treated ramie fiber with a volume fraction of 5, 10, and 15% was blended with waste polypropylene using an extruder at 180 °C to produce an RFRWPC pellet. The pellet obtained was used to prepare tensile and impact tests through an injection molding machine at 195 °C. The tensile and impact properties of RFRWPC were measured according to ASTM D638 and ASTM D256, respectively. The results showed that the polypropylene composite reinforced with 10% ramie fiber has a tensile strength 4.61% higher than glass fiber reinforced waste polypropylene composite (GFRWPC). RFRWPC with equivalent reinforcement percentages to commercial GFRWPC have nearly identical impact strength. The research findings demonstrated the excellent potential of ramie fiber as a green reinforcement as a substitute for glass fiber in enhancing the mechanical properties of polypropylene composites.

Abstract: Friction stir welding (FSW), which is termed a green manufacturing process, is a very efficient method for joining magnesium alloys. In this research work, dissimilar Mg-Al-Zn magnesium-alloys have been welded at different operating conditions using FSW method with the aim of optimizing the tensile-strength (TS). The maximum value of TS was 234.86 MPa which was obtained at 15 mm of shoulder-diameter ( SD_Tool), 40 mm/min of welding-speed (WS) and 1000 rpm of tool-rotational-speed (TRS). Further, mathematical model for TS was developed to optimize the TS using desirability approach. The desirability approach predicts the optimized value 248.83 MPa at 15 mm of SD_Tool, 30 mm/min of WS and 1000 rpm of TRS.