Research Article Optimization of Crashworthiness Parameters of Thin-Walled Conoidal Structures K. Vinayagar, 1 P. Ganeshan, 2 P. Nelson Raja, 1 M. S. Zakir Hussain, 3 P. Vengala Kumar, 4 P. Ramshankar, 5 V. Mohanavel, 6,7,8 N. Mathankumar, 9 K. Raja, 10 and Tesfaye Tefera Bezabih 11 1 Department of Mechanical Engineering, Fatima Michael College of Engineering & Technology, Madurai, India 2 Department of Mechanical Engineering, Sri Eshwar College of Engineering, Coimbatore 641202, Tamil Nadu, India 3 Department of Mechanical Engineering, AAA College of Engineering & Technology, Sivakasi, Tamil Nadu, India 4 Department of Mechanical Engineering, University VOC College of Engineering, oothukudi, Tamil Nadu, India 5 Department of Civil Engineering, University College of Engineering Dindigul, Dindigul 624622, Tamil Nadu, India 6 Centre for Materials Engineering and Regenerative Medicine, Bharath Institute of Higher Education and Research, Chennai 600073, Tamil Nadu, India 7 Department of Mechanical Engineering, School of Technology, Glocal University, Delhi-Yamunotri Marg, Saharanpur, Uttar Pradesh 247121, India 8 Department of Mechanical Engineering, Chandigarh University, Mohali 140413, Punjab, India 9 Department of Mechanical Engineering, NPR College of Engineering and Technology, Natham, Dindigul 624401, Tamil Nadu, India 10 Department of Mechanical Engineering, University College of Engineering Dindigul, Dindigul 624622, Tamil Nadu, India 11 Department of Mechanical Engineering, Ambo University, Ambo, Ethiopia Correspondence should be addressed to Tesfaye Tefera Bezabih; tesfaye.tefera@ambou.edu.et Received 15 July 2022; Revised 22 August 2022; Accepted 5 September 2022; Published 12 October 2022 Academic Editor: Pudhupalayam Muthukutti Gopal Copyright © 2022 K. Vinayagar et al. is is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. is paper aims to identify the optimum level of factors or parameters that affect the energy absorption of conoidal structures by grey relational examination. To optimize crashworthiness parameters of conical structures, the L9 orthogonal array has been adopted to design the experiments. e tailor-made thin-walled conical structures were fabricated by three most important factors, such as base diameter, height, and thickness, as design variables, and they were subjected to axial compression in a quasi- static method. e important responses of crashworthiness indicators such as the mean crushing force and specific energy absorption (SEA) were calculated with the help of a load-displacement curve. Experimental results showed that the crushing behaviours of conical structures were fairly significant. Grey relational analysis (GRA) and analysis of variance are used toobtain the optimal levels of parameters. From the results, the optimum levels of parameters are found to be a base diameter of 180 mm, a height of 120 mm, and a thickness of 1.5 mm. 1. Introduction Energy absorbers with lightweight are widely used to de- velop the crashworthiness of vehicles at the time of colli- sions. e thin-walled formations or structure are normally used as energy absorbers in all types of transport systems owing to their properties like very less weight and the ca- pacity to absorb more impact energy. By determining the mean crushing power, the energy lost until the substance or material was compressed-honeycomb structures' ability to absorb energy is assessed. Several studies have been carried out to develop theoretical models to forecast the mean or average crushing force for thin-walled structures. Significant analysis has been carried out by the authors in [1] intended for out-of-plane axial crushing confrontation of hexagonal honeycomb. e wall thickness and diameter of hexagonal Hindawi Advances in Materials Science and Engineering Volume 2022, Article ID 4475605, 6 pages https://doi.org/10.1155/2022/4475605