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Related Concept Videos

Response Surface Methodology01:16

Response Surface Methodology

214
Response Surface Methodology (RSM) is a collection of statistical and mathematical techniques used to develop, improve, and optimize processes. It is particularly valuable when many input variables or factors potentially influence a response variable.
The process of RSM involves several key steps:
214
Stress Concentrations01:24

Stress Concentrations

364
Stress concentration is when stress intensifies near discontinuities such as holes or abrupt cross-sectional changes in a structural member. This localized stress can often surpass the average stress within the member. The stress distribution in flat bars, either with a circular hole or varying widths connected by fillets, can be determined experimentally using a photoelastic method. The results are based on ratios of geometric parameters like the ratio of the hole's radius to the smaller...
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Unsymmetric Loading of Thin-Walled Members: Problem Solving01:07

Unsymmetric Loading of Thin-Walled Members: Problem Solving

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The shear center of a channel section with uniform thickness, height, and width, is determined by computing the shear force in the member and calculating the moments of inertia of the sections.
To compute the shear forces, find the shear flow at a specific distance from the endpoint using the vertical shear and the moment of inertia values. The total shear force on the flange is calculated by integrating the shear flow from one end of the flange to the other.
Next, calculate the moments of...
149

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Related Experiment Video

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Operation of the Collaborative Composite Manufacturing CCM System
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Multi Response Optimization of ECDM Process for Generating Micro Holes in CFRP Composite Using TOPSIS Methodology.

Manpreet Singh1, Sarbjit Singh2, Jatinder Kaur Arora1

  • 1Punjab State Council for Science and Technology, Chandigarh 160019, India.

Polymers
|December 11, 2022
PubMed
Summary

Electrochemical Discharge Machining (ECDM) precisely machines carbon fiber composites, optimizing micro-hole quality. This advanced method significantly reduces defects and improves material removal rates for critical applications.

Keywords:
TOPSISTaguchi’s methodcarbon fiber reinforced polymer compositeelectrochemical discharge machiningmicro-holesmorphology

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Area of Science:

  • Materials Science
  • Manufacturing Engineering
  • Composite Materials Machining

Background:

  • Carbon Fiber Reinforced Polymer Composites (CFRPCs) are crucial in aerospace, automotive, and electronics.
  • Existing machining methods for CFRPCs face limitations, hindering widespread adoption.
  • Precise micro-hole fabrication is essential for CFRPC applications.

Purpose of the Study:

  • To investigate the Electrochemical Discharge Machining (ECDM) process for micro-hole drilling in CFRPCs.
  • To optimize ECDM parameters for improved material removal rate (MRR) and reduced overcut.
  • To evaluate the surface quality of micro-holes produced by ECDM.

Main Methods:

  • Experimental design using an L9 orthogonal array.
  • Input parameters: applied voltage, electrolyte concentration, and inter-electrode gap.
  • Output parameters: Material Removal Rate (MRR) and overcut.
  • Multi-response optimization using the Technique for Order Preference by Similarity to Ideal Solution (TOPSIS).

Main Results:

  • Optimized ECDM parameters using TOPSIS significantly improved MRR and reduced overcut.
  • Overcut reduced from 150 µm to 48 µm.
  • MRR improved from 2.232 mg/min to 2.1267 mg/min.
  • Machined micro-holes exhibited superior surface quality with fewer micro-cracks and uniform diameter.

Conclusions:

  • ECDM is a viable and effective method for precise micro-hole machining of CFRPCs.
  • TOPSIS methodology successfully optimized ECDM parameters for enhanced performance.
  • The optimized ECDM process yields high-quality micro-holes suitable for demanding applications.