Title: Determination of localised spot weld rupture between inner and outer panels of car bonnet

Authors: Atul V. Karanjkar

Addresses: Department of Mechanical and Mechatronics Engineering, Thakur College of Engineering and Technology, Kandivali (East), Mumbai 400101, India

Abstract: A car bonnet, also known as an engine hood, is one of the automotive closures that provide an aesthetic and aerodynamic shape to improve vehicle performance as well as pedestrian and occupant safety. Many factors influence its design, including cost, weight, durability, and stiffness, to meet the standards of numerous regulatory bodies. It is necessary to monitor the bonnet condition because it is an integrated structure. This paper defines the separation of the joining point between inner and outer panels as damage to the bonnet structure. An experimental vibration analysis has been provided for the damage detection of a commercial car bonnet. A parametric model was created utilising 3D scanning of a real bonnet to verify the results of experimental vibration analysis. Using finite element analysis (FEA), the natural frequencies for undamaged and damaged bonnet states are determined. A classical thin plate theory (CTPT) with justified approximations is used.

Keywords: car bonnet; classical thin plate theory; CTPT; weld rupture; experimental vibration analysis; FFT analyser; 3D scanning; 3D modelling; finite element analysis; FEA.

DOI: 10.1504/IJDE.2023.135574

International Journal of Design Engineering, 2023 Vol.12 No.2, pp.115 - 126

Received: 26 Feb 2023
Accepted: 11 Jun 2023
Published online: 18 Dec 2023 *

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