i-manager's Journal on Mechanical Engineering (JME)


Volume 1 Issue 4 August - October 2011

Research Paper

Investigations of the influence of filler on the Impact properties of Polyamides and its Composites

Mithun V Kulkarni* , Elangovan K.**, K. Hemachandra Reddy*******
* Research scholar, JNTU College of Engineering, Anantapur, AP, India.
** Assistant Professor, Cambridge Institute of Technology, Bangalore, Karnataka, India.
*** Professor, Department of Mechanical Engineering, JNTU College of Engineering, Anantapur, Andhra Pradesh, India.
**** Professor, Department of Mechanical Engineering, East West Institute of technology, Bangalore, Karnataka, India.
Mithun V. Kulkarni, K. Elangovan, K. Hemachandra Reddy and J. N. Prakash (2011). Investigations Of The Influence Of Filler On The Impact Properties Of Polyamides And Its Composites. i-manager’s Journal on Mechanical Engineering, 1(4), 1-6. https://doi.org/10.26634/jme.1.4.1539

Abstract

This paper helps in understanding the influence of filler on the impact properties of Polyamides (Nylon6) and its composites. Generally, it is known that ABS possesses more toughness than Nylon6 and hence an effort has been made to make Nylon6 tougher than ABS material. The Nylon6 is reinforced with Glass Fibre and Casio3 (Calcium Silicate). Low velocity impact investigations have been carried out using a vertical drop- weight testing machine. The tests were conducted on the samples at different drop heights of 320 mm, 620 mm, 1000 mm and different drop weights of 0.89 kg, 1.395 kg and 2.33 kg.  Impact measurement under the above said conditions for the materials A, B, C and D indicated that the addition of Glass Fibre and Casio3 led to a significant improvement in the impact strength of the polyamides.

Research Paper

Development of New Suspension System for Passenger Vehicles to Improve Occupants Comfort

K. Prabu* , J. Jancirani**
*_** Madras Institute of Technology, Chennai, India.
K. Prabu and J. Jancirani (2011). Development Of New Suspension System For Passenger Vehicles To Improve Occupants Comfort. i-manager’s Journal on Mechanical Engineering, 1(4), 7-13. https://doi.org/10.26634/jme.1.4.1540

Abstract

In modern vehicle suspension systems poses significant challenges to suspension system design. Consequently, novel suspension concepts are required to improve the vehicle’s dynamic performance. In recent years, attributed to the fact that active suspension systems have superior performance in terms of ride comfort and road-handling performances compared to their passive and semi-active suspensions parts. A feasibility study of the development of an active automotive suspension system using Linear motor actuator will be presented. This system developed the high performance and quick response with the reliability of passive dampers in a single package, offering safe superior suspension system.  As a response to the expanding demand for superior vehicle suspension systems, this study describes the performance evaluation of a new Linear motor actuator in an active suspension system. Main advance of the solution is the to generate desire force acting between the unsprung mass and the spring mass of the vehicle opposite to the sprung mass displacement, providing reduction in sprung mass displacement providing good insulation against the road disturbances.  It is to be tested in frequency/time domains for verification of the derived analytical and simulation models. The presented study is only a small portion of the growing research in this area, and it is hoped that the results obtained here will lead to the realization of a safer and more superior automotive suspension system.

Research Paper

Experimental Studies of Gas pressure Superplastic Cone Forming

Multhan* **, T. A. Janardhan Reddy ***
* Bharat Dynamics Limited, Hyderabad, A.P.
** St. Joseph”s College of Engineering and Technology, Choondacherry, Palai, Kerala.
*** S.V. College of Engineering and Technology, R.R. District, Hyderabad, A.P.
**** CVR College of Engineering, Hyderabad, A.P.
Multhan, J. Babu, Abhijit Dutta and T. A. Janardhan Reddy (2011). Experimental Studies Of Gas Pressure Superplastic Cone Forming. i-manager’s Journal on Mechanical Engineering, 1(4), 14-19. https://doi.org/10.26634/jme.1.4.1541

Abstract

Superplasticity is the ability of the materials to under go large uniform strains prior to failure. Super plastic forming (SPF) is a near net-shape forming process used in aero-shape and automobile industries. Superplastic forming of conical shapes invariably poses a problem so far as large thickness variation is concerned, which occurs between apex and base of the cone. The observed variation is inevitable in Superplastic forming. In the present investigations a nearly uniform thickness could be achieved in a conical dome shape by pre-profiling of the initial blank, while the present experiments were carried out with a model material Sn-Pb alloy of 60%Sn and 40%Pb. The same is applicable for other superplasic materials e.g., Al-alloys, Ti-alloys etc. Initial experiments were carried out with uniformly disc shaped blanks, which have shown a large variation in thickness at different stages of forming of conical shapes. A simple mathematical manipulation leads to a design of profiled blank, which was thicker at centre and thinner at periphery. After forming up to an average strain of 0.54, the experiment was halted and reasonable uniformity of thickness was noted at this stage of forming.

Research Paper

Characterization of Aluminum Rib Distortion Under High Speed Machining

Emmanuel I. Agba*
Mechanical Engineering Department, Iowa State University, Ames, Iowa.
Emmanuel I. Agba (2011). Characterization Of Aluminum Rib Distortion Under High Speed Machining. i-manager’s Journal on Mechanical Engineering, 1(4), 20-26. https://doi.org/10.26634/jme.1.4.1543

Abstract

The distortion of thin-walled aluminum ribs under milling operations places a constraint on the achievable rib thickness and surface quality.  End milling is the most common way of producing thin-walled aluminum structures such as ribs and webs.  The cutting tools for this process could be significantly long, slender and deficient in stiffness.  Hence, the combined elastic compliance of the thin-walled rib and cutting tool produces significant distortions, in terms of deviations in the thickness and surface flatness of the machined rib.  This paper presents a study of such variations in the distortion of aluminum ribs machined by end milling at low and high spindle speeds.  Unsupported thin-walled aluminum structures were end-milled to thin-walled sections at low and high spindle speeds, respectively.   The resulting variations in thickness and flatness at both speed regimes were compared.  The same machining conditions, in terms of feeds, depth of cut, and cutter tool paths were maintained.  Also, the use of mist and flood coolant was respectively investigated to demonstrate the effect of environmental conditions on the achievable rib distortion.

Research Paper

Agility Design System For Supply Chain Integration

Karuppusami* , 0**, R. Sudhakaran*******
*-*** Assistant Professor(SRG), Department of Mechanical Engineering, Kumaraguru College of Technology, Coimbatore.
** Director, Karpagam University, Coimbatore.
**** PG-Industrial Engineering Student, Department of Mechanical Engineering, Kumaraguru College of Technology, Coimbatore.
M. Balaji, G. Karuppusami, R. Sudhakaran and A. Chobiya Ashwini (2011). Agility Design System For Supply Chain Integration. i-manager’s Journal on Mechanical Engineering, 1(4), 27-33. https://doi.org/10.26634/jme.1.4.1544

Abstract

In modern manufacturing arena the supply chain of the firms are given equal importance along with the products since it not only opens up an area for cost cutting but serves as a fruitful effort for profit making. Supply chain is a closed loop consisting of different functionaries like the suppliers, distributors and retailers. However, the profitability and the decision making in supply chain is not a confined task. To achieve the total supply chain profitability it is vital to maintain healthy communication between the different levels. Maximization of the profit is focused on each level but individual levels can not optimize it. Communication distortion and the information asymmetry result from lack of coordination, which becomes the major sources of the “bullwhip-effect”. This paper attempts to designing a system which would achieve the integration in supply chain levels which in turn will maximize the profit. One such model to design a system that brings quicker response and improved communication is discussed here as “TADS”. The “Total Agile Design System” facilitates the integration of the levels of supply chain which in turn tampers the “bullwhip — effect”.

Research Paper

Impact of Oxygen Enriched Combustion on Ignition Delay and Heat Release Curves of a Single Cylinder Diesel Engine

Kuppusamy Rajkumar* **
*-** Department of Mechanical Engineering, Sona College of Technology, Salem.
Kuppusamy Rajkumar and Palanisamy Govindarajan (2011). Impact Of Oxygen Enriched Combustion On Ignition Delay And Heat Release Curves Of A Single Cylinder Diesel Engine. i-manager’s Journal on Mechanical Engineering, 1(4), 34-39. https://doi.org/10.26634/jme.1.4.1545

Abstract

In the present experimental work a computerized Single cylinder Diesel engine with data acquisition system was used to study the effects of oxygen enriched air intake on Ignition delay and Heat release curves. Increasing the oxygen content with the air leads shorter Ignition delay, elevated heat release curves  and the ability to burn more fuel at the same stoichiometry. Added oxygen in the combustion air offers more potential for burning diesel. Engine test have been carried out in the above said engine for different loads and the range of ignition delay and Heat release curves with respect to different percentage of oxygen enrichment was discussed.

Research Paper

Experimental Study of the Effect of Roller Burnishing on Surface Characteristics of EN-31

Sukhminderbir Singh Kalsi* **, 0***
* Amritsar College of Engineering and Technology, Amritsar, Punjab, India.
**-*** Department of Mechanical Engineering, Beant College of Engineering and Technology, Gurdaspur, Punjab, India.
**** GNDU Regional Center Jalandhar, Punjab, India.
Sukhminderbir Singh Kalsi, Jagdev Singh, Brij Bhushan and Harminder Singh (2011). Experimental Study Of The Effect Of Roller Burnishing On Surface Characteristics Of EN-31. i-manager’s Journal on Mechanical Engineering, 1(4), 40-45. https://doi.org/10.26634/jme.1.4.1546

Abstract

The present experimental work was conducted on a lathe machine to establish the effects of various roller burnishing parameters: burnishing force, burnishing feed and burnishing speed on the surface roughness and surface hardness of EN-31 steel. A simple designed roller-burnishing tool was used throughout the experimental work presented in this paper. It was observed that all the parameters studied; effect the surface finish and surface hardness to varying degrees. The surface roughness Ra first decreases and then increases with increasing burnishing force. The effects of burnishing feed and burnishing speed on the surface finish also showed similar trends. Results showed that the burnishing feed, burnishing speed and burnishing force has also significant effect on surface hardness.