1 66 th CONGRESS OF ISTAM Section Code: SM7 Modelling the Mechanical Behavior of an Adhesively Bonded Scarf Joined CFRP Laminates Hetram Sonwani 1 , Sai Sidhardh 2 , M. Ramji 3 1, 3 Engineering Optics Lab, Department of Mechanical and Aerospace Engineering, IIT Hyderabad, Telangana, India 2 Department of Mechanical and Aerospace Engineering, IIT Hyderabad, Telangana, India Email: [email protected] ABSTRACT In the present study, the mechanical of adhesively bonded single scarf joint between CFRP uni-directional (UD) laminates is studied. An analytical approach is used here to obtain the governing differential equations of equilibrium for the adhesively bonded single scarf joint. The finite difference scheme is employed for a numerical solution of the analytical model. Following a validation with the experimental results available in literature, the mechanical behavior of the single scarf joint is analysed here. The analytical model developed here for the adhesive joints serves as a high-fidelity and a highly accurate alternative to 3D finite element models commonly used in research and industry. Keywords: Adhesively bonded scarf joint, CFRP UD laminate, finite difference method. 1. INTRODUCTION Composites are ubiquitous in aerospace, mechanical, civil, marine industries. This may be owed to their excellent mechanical properties such as high strength to weight ratio, stiffness, corrosion resistance, thermal resistance, and fatigue resistance. In situ damage in composite structures can be repaired by either replacing or reinforcing the damage area. This is undertaken with the help of an adhesive bonded joint between the parent structure and the replacement patch. An adhesively bonded joints offer several advantages like light-weight structures when compared with the traditional joint techniques like welded, rivet, and other mechanical joints. Typically, a joint within the structural component is prone to failure, and is one of the weakest regions. This makes their design and analysis critical from the integrity stand point. Most industries, especially aerospace prefer an adhesively bonded joint as it
Modelling the Mechanical Behavior of an Adhesively Bonded Scarf Joined CFRP Laminates
Jul 01, 2023
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