Applied Engineering Letters

The roughness and lubrication of the contact surfaces play a major role in determining the contact forces and the coefficient of friction during contact between the two parts. The objective of the research, the results of which are presented in this paper, was to establish what, in fact, is the influence of those two important parameters on the surface properties of the shot- peened C35 steel specimens. Another important aspect that was considered was the influence of the post-treatment of the shot-peened specimen surfaces, the fine grinding. The experimental work included verification of the steel’s chemical composition (as compared to the standard values), the heat treatment, evaluation of the material’s microstructure, measurement of the mechanical properties, the shot-peening treatment and evaluation of the magnitude of the compressive residual stresses, measurement of the surface roughness profiles and the friction tests. An effect of the surface roughness and lubricant on the coefficient of friction (CoF) was established. The CoF values of the dry shot-peened steel surface after the fine grinding, as compared to the unground surface, decreased from about 30% to 39%. The application of lubricant caused the CoF to decrease by 66% and 43% for the ground and unground surfaces, respectively.

Martin Vicen

Otakar Bokůvka

Libor Trško

Richard Joch

Jozef Bronček

Ružica Nikolić

Robert Ulewicz

Applied Engineering Letters Journal of Engineering and Applied Sciences

Influence of the surface roughness, lubrication and grinding on tribological properties of the c35 steel shot-peened surfaces

表面粗糙度、润滑和磨削对C35钢喷丸表面摩擦学性能的影响

In recent years, there has been a considerable increase in interest in the use of natural fillers in polymer composites because of their potential to improve mechanical qualities while preserving environmental sustainability. This study investigates the potential of utilizing agricultural waste, specifically Bagasse Ash (BA) and Pistachio Shell Ash (PA), as fillers in epoxy composites to enhance mechanical properties and support sustainable material development. Composites were prepared with varying weight percentages (2% to 10%) of BA and PA using an open mold technique. Mechanical properties, including tensile, flexural, and impact strength, were assessed to determine the effect of filler content. Results indicate that BA composites generally outperformed PA composites in tensile and flexural strength, with maximum tensile strength recorded at 6% filler content for both BA (19.16 MPa) and PA (11.49 MPa). The analysis shows that increasing filler content beyond the optimal level leads to decreased mechanical performance due to agglomeration and void formation. The enhanced mechanical properties of these composites suggest their suitability for applications in lightweight structural components, offering an eco-friendly alternative to conventional synthetic fillers.

Dittakavi Tarun

G. Ganesan

K. Syam Sundar

Investigation of the mechanical behavior of epoxy composites filled with bagasse ash and pistachio shell ash: a comparative study

甘蔗渣灰和开心果壳灰填充环氧复合材料力学性能的比较研究

Machine selection plays a crucial role as it impacts various aspects of production, including technical, economic, and environmental factors. Choosing a machine that ensures a balance among all these aspects is a complex task, as each type of machine involves numerous parameters that need consideration, and these parameters may sometimes conflict with one another. This study applies the probability method to select the optimal machine from the available options. It can be asserted that this is the first study utilizing probability for machine selection. The application of probability to choose the optimal machine has been carried out in five cases to select five different types of machines across various fields. The results of machine selection using the probability method have been compared with those obtained using other methods. This study has demonstrated that using probability ensures accuracy in machine selection.

Do Duc Trung

Manh Thi Diep

Duong Van Duc

Nguyen Chi Bao

Nguyen Hoai Son

Application of probability theory in machine selection

概率论在机器选择中的应用

Aluminium 6061 (AA6061) plays an important role in modern engineering due to its versatile applications, including aerospace, automotive, and construction. This study explores AA6061 as a matrix material reinforced with walnut shell ash (WSA) and Silicon Carbide (SiC), produced through the ultrasonic-assisted stir casting technique. The research aims to improve the process parameters using the Taguchi L9 orthogonal array. The parameters include weight percentage of reinforcement – 2% (1%WSA+1%SiC), 4% (2%WSA+2%SiC), and 6% (3%WSA+3%SiC), Stirring speed (SS) -300 rpm, 350 rpm, and 400 rpm, and Stirring time (ST) -2, 3, and 4 minutes. The response properties examined are hardness, impact strength, and compressive strength. Optimal parameters for achieving maximum hardness are 6% reinforcement, 300 rpm stirring speed, and 2 minutes of stirring time. For optimal impact strength, the best conditions are 2% reinforcement, 300 rpm stirring speed, and 2 minutes of stirring time. For maximum compressive strength, the ideal parameters are 6% reinforcement, 400 rpm stirring speed, and 3 minutes of stirring time. Scanning Electron Microscope (SEM) images confirmed the uniform distribution of reinforcements, supporting the results. This study demonstrates the impact of optimizing process parameters to improve the mechanical properties of AA6061 composites, contributing significantly to their potential applications.

Rajesh Angirekula

S. Manickam

P. Ravindra Babu

Optimizing process parameters for enhancing mechanical properties of aa6061 composites reinforced with walnut shell ash and silicon carbide

优化核桃壳灰和碳化硅增强AA6061复合材料力学性能的工艺参数

In automotive component manufacturing, temperature gradients are typical at workstations, especially in summer, affecting production processes. Interruptions in production lines are unacceptable, as constant flow is crucial to avoid financial losses. This issue is evident at the assembly station for the countershaft of truck transmissions, which can reach 181.7°C after welding. During summer, downtimes increase due to inadequate cooling process, as indicated by 235 minutes of downtime in May, coinciding with rising temperatures and increased demand in September, highlighting the need for an effective cooling system. This research proposes a novel design to homogenize cooling times for the countershaft. The cooling cabin was designed to fit the shaft dimensions, with air inlets strategically positioned based on assembly geometry, focusing on the hottest area. Numerical simulations using the finite element method integrated a turbulence model to analyze airflow at the cabin’s inlet and outlet. The goal was to reduce the shaft temperature from 181.7°C to an ambient range of 28°C to 34°C, minimizing cooling time and reducing downtime. Results showed a successful reduction, achieving 26.9°C.

L.E. Espino-De la Rosa

H. Arcos-Gutiérrez

J.E. García Herrera

I.E. Garduño

J.A. Betancourt-Cantera

Development of an innovative cooling system at the countershaft assembly station

变速箱副轴装配工位创新冷却系统的开发

涉及主题	工程类物理计算机科学材料科学复合材料热力学数学机械工程冶金量子力学生物化学有机化学结构工程环境科学
出版信息	出版商: Serbian Academic Center，出版周期: ，期刊类型: journal，开源期刊: 是
基本数据	创刊年份: 2016，原创研究文献占比: 0.00%，自引率:N.A.， Gold OA占比: 0.00%
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Applied Engineering Letters

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Influence of the surface roughness, lubrication and grinding on tribological properties of the c35 steel shot-peened surfaces

Investigation of the mechanical behavior of epoxy composites filled with bagasse ash and pistachio shell ash: a comparative study

Application of probability theory in machine selection

Optimizing process parameters for enhancing mechanical properties of aa6061 composites reinforced with walnut shell ash and silicon carbide

Development of an innovative cooling system at the countershaft assembly station

Influence of the surface roughness, lubrication and grinding on tribological properties of the c35 steel shot-peened surfaces

Investigation of the mechanical behavior of epoxy composites filled with bagasse ash and pistachio shell ash: a comparative study

Application of probability theory in machine selection

Optimizing process parameters for enhancing mechanical properties of aa6061 composites reinforced with walnut shell ash and silicon carbide

Development of an innovative cooling system at the countershaft assembly station

ISSN	2466-4677, 2466-4847
h-index	8