Abstract
The high fracture strength and exceptional impact resistance of polymer-based composites are of paramount importance to various industries like aerospace, automotive, and construction. The resin transfer molding (RTM) process is used to produce composite samples of superior quality, minimal porosity, and reduced lamination defects. In the present study, the RTM method was employed to fabricate glass fiber-reinforced composites, aiming to investigate their specific mechanical properties and structural performance. The study initially determined the ballistic limit of the produced samples. Subsequently, experimental investigations were carried out to examine the impact of hole drilling on the tensile strength, flexural strength, and impact resistance of the samples. The results revealed that the produced polymer plate demonstrated a ballistic limit with a pressure of 11 bar and a speed of 104 m/s, leading to ball restriction in the plate. The sample without holes showed the highest fracture force, while samples with three and five holes exhibited reduced fracture forces. Additionally, bending force and impact resistance were lower in samples with multiple holes compared to the sample without holes. The impact resistance of the sample with five holes was the lowest among all configurations. The study revealed that the presence of three holes arranged in a row has a lesser impact on reducing the ultimate tensile force compared to the effect of five holes. Moreover, the bending test results indicated that sample failure occurred on the side under tension, resulting in higher bending forces than tensile forces.
Article highlights
Using resin transfer molding (RTM) method to produce high quality polymeric composite samples.
Determination of ballistic limit of glass fiber-reinforced composite samples.
Evaluation of the influence of the hole drilling on the tensile strength, flexural strength, and impact resistance of the samples.
Analysis of bonding and microstructural of the samples by SEM and EDX tests.
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Details
1 Technical and Vocational University (TVU), Department of Mechanical Engineering, Tehran, Iran (GRID:grid.510424.6) (ISNI:0000 0004 7662 387X)
2 Shahid Rajaee Training Teacher University, Department of Mechanical Engineering, Tehran, Iran (GRID:grid.440791.f) (ISNI:0000 0004 0385 049X)
3 Bu-Ali Sina University, Mechanical Engineering Department, Hamedan, Iran (GRID:grid.411807.b) (ISNI:0000 0000 9828 9578); Basa Pars Sanat Knowledge Enterprise Company, R&D Center, Takestan, Iran (GRID:grid.411807.b)
4 Qom University of Technology, Department of Mechanical Engineering, Qom, Iran (GRID:grid.459900.1) (ISNI:0000 0004 4914 3344)
5 Amirkabir University of Technology (Tehran Polytechnic), Biomedical Engineering Department, Tehran, Iran (GRID:grid.411368.9) (ISNI:0000 0004 0611 6995)