International Journal of Engineering Research

P. Moulali ¹, N. Upendra ², D. Siva Kumar ²

Affiliations
1 Santhiram Engineering College, Nandyal, A.P., IN
2 R.G.M. College of Engineering & Technology, Nandyal, A.P., IN

Abstract

This paper describes design and fatigue analysis of mono leaf spring. Weight reduction is now the main issue in automobile industries. In the present work, the dimensions of an existing mono steel leaf spring of a Maruti 800 passenger vehicle is taken for modelling and analysis of mono leaf spring with two materials namely, steel and Carbon/Epoxy subjected to the same load. The design constraints were stresses, deflections, damage, and life and safety factor. The two different leaf springs have been modelled by considering uniform cross-section, with unidirectional fibre orientation angle for each lamina of a laminate. Fatigue analysis of a 3-D model has been performed using ANSYS workbench. Keywords: Composite leaf spring (CLS), Fatigue analysis, Steel, Carbon/Epoxy. The fatigue analysis is performed under different repetition loads 250 and 397.27 with different time 10, 20, 30 and 40sec respectively.

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S. Bhargavi Devi ¹, Y. Suresh Babu ¹, C. Naresh ¹, N. Upendra ¹

Affiliations
1 School of Mechanical Engineering, RGMCET, Nandyal, IN

Abstract

Bamboo/Glass fiber reinforced polymer composites are replacing conventional metal alloys owing to their ecofriendly nature. Natural fibers as reinforcement offer number of advantages than traditional synthetic fibers. This paper aims to determine the mechanical properties namely, Tensile strength(TS), Impact strength (IS), Flexural strength (FS) and Hardness of hybrid composites reinforced with Bamboo/Glass fiber. The Treated bamboo fibers are mixed with the glass fiber in the proportion of 1:1, in order to reinforce in epoxy resin with different fiber lengths(5,10,15 mm) and fiber weight fractions of (20%,30%,40%). Experiments are planned according L9 orthogonal array in Taguchi's design of experiments. The control parameters considered were fiber length (Fl) and percentage Fiber weight fraction (Wf). In this work an attempt has been made to model the mechanical properties through response surface methodology (RSM). Analysis of variance (ANOVA) is used to check the validity of the model. The results indicated that the developed quadratic models are suitable for the prediction of mechanical properties of the Bamboo/glass fiber reinforced epoxy composites. The experiment result reveals that tensile strength, flexural strength and hardness were decreased with increase of fiber length but impact strength increased with increase of fiber length.

Keywords

Bamboo Fiber, Chemical Resistance, Glass Fiber, Hybrid Composites, Mechanical Properties.

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V. Chandra Sekhar ¹, V. Pandurangadu ², T. Subba Rao ³, N. Upendra ⁴

Affiliations
1 Dept of ME, RGMCET, Nandyal, 518501, Andhra Pradesh, IN
2 Dep. of ME, JNTUniversity, Anantapur. 515002 Andhra Pradesh, IN
3 Dept. of Physics, S K University, Anantapur, 515002, Andhra Pradesh, IN
4 Dept. of Mechanical Engg, RGMCET, Nandyal. 518501. Andhra Pradesh, IN

Abstract

A composite is usually made up of at least two materials out of which one is binding material called as matrix and other is a reinforcement material known as fiber or whisker. The important characteristics of composites are their strength, hardness rigid light in weight. Composites can be produced by using natural fibers such as banana fiber, bamboo fiber, jute, coir and silk. Bamboo posses better properties than other natural fibers. In the present work, composites are produced from epoxy resin with bamboo fibers. The bamboo fibers of 3mm in diameter (approximately) of fixed percentage (08% by weight fraction) are placed in different orientation i.e.30°, 45°, 60°, and 90°. The mechanical properties such as tensile strength, flexural strength, and impact strength tests are conducted.

Keywords

Matrix, Bamboo Fiber, Epoxy Resin, Composite, Flexural, Tensile, Orientation, Impact Strength, Tensile Strength.

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N. Upendra ¹, P. Moulali ², K. Ajay Kumar Reddy ³

Affiliations
1 R.G.M. College of Engineering & Technology, Nandyal, A.P., IN
2 Santhiram Engineering College, Nandyal, A.P., IN
3 AITS College, Rajempet, A.P., IN

Abstract

Hydraulic and pneumatic system equipments are the important components of engineering applications. Hydraulic cylinders are one of the most common components of the hydraulic systems used in many engineering applications like; automatic manufacturing and montage lines, heavy construction equipments, control systems, sensitive measurement and test systems. They are used for producing linear motion in the hydraulic systems and they convert hydraulic energy to mechanical energy. Many machines and machine mechanisms run under static and dynamic working conditions. The vibrations produced under static and dynamic conditions affect many important design parameters such as strength, production costs, productivity. In this paper, the dynamic and static analysis of a composite hydraulic cylinder subjected to pressure by varying fibre orientation and different boundary conditions is determined. The finite element methods used in the analysis are applied by using analysis software ANSYS.

Keywords

Static and Modal Analysis, Hydraulic Cylinder, Finite Element Method, ANSYS.

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