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R. Manoj Kumar

Bio: R. Manoj Kumar is an academic researcher from Madanapalle Institute of Technology and Science. The author has contributed to research in topics: Ultimate tensile strength & Flexural strength. The author has an hindex of 1, co-authored 2 publications receiving 4 citations.

Papers
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Journal ArticleDOI
TL;DR: In this article, the effect of Halloysite Nanotube (HNTs) concentration on LLDPE composites for enhancing the mechanical and thermal stability was evaluated and it was shown that higher concentrations of HNTs are favorable in improving the flexural strength rather than tensile properties.

15 citations

Book ChapterDOI
01 Jan 2021
TL;DR: In this article, the erosion wear behavior of AA5083 aluminium alloy is investigated by slurry pot erosion method using various sizes of silica sand particles, and experiments were conducted and optimum process parameters were identified by analyzing results of erosion test.
Abstract: In this study, the erosion wear behaviour of AA5083 aluminium alloy is investigated by slurry pot erosion method. Various sizes of silica sand particles are used to evaluate the erosion wear behaviour of AA5083 alloy by measuring the mass loss. By employing Taguchi L9 orthogonal array, experiments were conducted and optimum process parameters are identified by analysing results of erosion test. Based on the ANOVA, the significant contribution of input parameters is identified. The dominant material removal mechanisms are observed through an optical microscope images, and reasons are discussed in detail.

Cited by
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Journal ArticleDOI
TL;DR: In this article, the impact of seawater aging and halloysite nanotube (HNT) nano reinforcements on the bearing performance of basalt-epoxy composites was investigated.
Abstract: Although they enable for facile disassembly and inspection of critical assemblies, bolted joints are common damage initiation sites in laminated composite structures Sudden failure can occur at these locations especially with the combination of corrosive environments In order to well understand and characterize for marine applications, we aimed to research the impact of seawater aging and halloysite nanotube (HNT) nano reinforcements on the bearing performance of basalt-epoxy composites For this, basalt fabrics were impregnated with HNT modified epoxy matrix via vacuum infusion and the resultant multi-scale laminates submerged in seawater up to 6 months after assembling via bolted joints Single shear tensile tests of seawater aged joints were performed according to ASTM D5961 and the results compared with the HNTs reinforced hybrid laminates HNTs nano reinforcements remarkably improved the bearing strength basalt/epoxy composite laminates with a 18% increase In addition, seawater aging drastically impairs the bearing response of composite laminates with an almost 45% reduction in bearing strength after 6 months of exposure Bearing fracture modes were also affected with the addition of HNTs and seawater aging, the resultant fracture surfaces were examined to reveal degradation mechanisms related to seawater aging and HNTs reinforcement after single shear tensile tests The results can contribute to a better understanding of mechanical design parameters for bolted fiber reinforced polymer composites exposed to corrosive environments

14 citations

Journal ArticleDOI
TL;DR: In this paper , the authors used a wet-wrapping process by hand lay-up and tested under quasi-static axial loadings to evaluate the energy absorption properties of glass reinforced epoxy composite tubes.
Abstract: Glass reinforced epoxy composite tubes filled with 1, 2, 3, and 4 wt. % of HNC, MC, Al2O3, SiO2, and SiC nanofillers were fabricated using wet-wrapping process by hand lay-up and tested under quasi-static axial loadings. Crashworthiness parameters and failure modes were recorded. Results indicated that EAC and the specimens’ failure modes are dominated by the type and wt. % of the embedded nanofillers. As compared to pristine glass/epoxy tubes, an enhancement of 230.42, 243.30, 286.43, and 336.12% in the absorbed energy (U) was attained by the addition of 1, 2, 3, and 4 wt. % of HNC, respectively. An improvement of 21.93, 87.35, 225.99, and 318.07% in U was achieved by the inclusion of 1, 2, 3, and 4 wt. % of MC, respectively. An enhancement of 17.66, 51.63, and 71.94% in U was reported by the integration of 1, 2, and 3% of nano-Al2O3. Whilst a reduction of 31.16% was noticed for 4 wt. % of nano-Al2O3. The incorporation of nano-SiO2 and nano-SiC exhibits a reduction in U of the fabricated tubes. Composites filled with 4 wt. % of HNC has the highest load carrying capacity and EAC of 32.75 kN and 1110.84 J, respectively. So, they seem to be the best appropriate choice for energy absorbing elements. Glass/epoxy composite tubes filled with HNC, MC, and Al2O3 show outstanding energy absorption characteristics. However, specimens filled with SiO2 and SiC nanofillers are ineffective in the crashworthiness applications.

9 citations

Journal ArticleDOI
TL;DR: In this paper , a full factorial design was exploited to clarify the influence of each factor as well as its interaction on outcomes, and the essential work of fracture (EWF) approach was utilized to study the effect of each factors on fracture behavior.
Abstract: In this article, mechanical and fracture properties of two types of nanoparticles, namely fumed silica (FS) and halloysite nanotube filled polypropylene (PP) toughened with two types of thermoplastic elastomers (TPOs), namely ethylene-based TPO (ETPO) and propylene-based TPO (PTPO) were investigated. A full factorial design was exploited to clarify the influence of each factor as well as its interaction on outcomes. The essential work of fracture (EWF) approach was utilized to study the effect of each factor on fracture behavior. The addition of TPO enhanced the elongation at break and non-EWF by 62% and 40%, in turn. In addition, the tensile strength, modulus, and EWF increased by 8%, 34%, and 7%, respectively, by increasing the nanoparticles up to 1 wt%. The blend nanocomposite with 10 wt% of PTPO and 1 wt% of FS was selected as the best stiffness- toughness-strength equivalence based on optimization results. Additionally, the R2 extracted from the analysis of variance (ANOVA) and plots of normal probability indicated good agreement between the experimental data and for foreseen one using full factorial models.

8 citations