Informatics Publishing Limited

Yeole Shivraj Narayan ¹, N. N. Ramesh ², B. Balu Naik ³

Affiliations
1 Department of Mechanical Engineering, VNR VJ Institute of Engineering & Technology, Hyderabad, Andhra Pradesh, IN
2 CMR Engineering College, Hyderabad, Andhra Pradesh, IN
3 Department of Mechanical Engineering, Jawaharlal Nehru Technological University, Kukatpally, Hyderabad, Andhra Pradesh, IN

Abstract

Micro EDM, a variant of Electrical Discharge Machining (EDM) process, is used to drill micro holes in hard and electrically conducting materials. Since Maraging Steel 300 alloy has not been studied on micro EDM process, an attempt has been made in this research paper to investigate the effect of various process parameters on tool wear rate (TWR) in micro EDM drilling of holes in Maraging Steel 300 alloy using Taguchi Methodology. Process parameters taken up for study are Pulse-on time, Pulse-off time, Tool diameter and current. Brass electrode of 300 μm, 400 μm and 500 μm diameter is used as tool material. The experiments were carried out using L₉ (3⁴) orthogonal array. Based on eroded length of tool and volume measurements, the tool wear rate is calculated for various combinations of factors and levels. The results of experiments are thoroughly discussed and the effect of process parameters on tool wear rate is presented.

Keywords

Micro EDM, Maraging Steel 300 Alloy, Tool Wear Rate, Taguchi Method.

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J. Dhanraj Pamar ¹, B. Balu Naik ²

Affiliations
1 Muffakham Jah College of Engineering and Technology, Banjarahills, Hyderabad, IN
2 JNTU College of Engineering, Manthani, IN

Abstract

Polymeric composites have gone through a level of maturity beyond the laboratory stage with the development of all composite aircraft structures. Yet the basic understanding of the material used in its primary structure has not been extensively investigated. Although this may be attributed in part to the proprietary nature of the system, we believe that it is because of lack of specific tools required for its analysis. Specifically, micromechanical models always assume an evenly distributed homogeneous matrix while lamination theory assumes constant stress through the laminate thickness. Specifically, this work focuses on the development of model systems that can be studied without concerns of proprietary and/or export control requirements. Consequently, the amount of toughness improvement must be balanced between interlaminar and intralaminar fracture toughness. Finally, this work has demonstrated that even though the multilayer structured laminates provide Mode II interlaminar fracture toughness improvements, their mechanical testing behavior is extremely different than conventional composite structures.

Keywords

Laminates, Matrices, Carbon Fiber Composites.

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