Formulation for multiple cracks problem in thermoelectric-bonded materials using hypersingular integral equations

• Main Authors: Hamzah, Khairum, Mohd Nordin, Muhammad Haziq Iqmal, Khashi’ie, Najiyah Safwa, Waini, Iskandar, Nik Long, Nik Mohd Asri, Fitri, Saadatul
• Format: Article
• Language: English
• Published: MDPI AG 2023
• Online Access: http://eprints.utem.edu.my/id/eprint/27491/2/0215302082023280.PDF; http://eprints.utem.edu.my/id/eprint/27491/; https://www.mdpi.com/2227-7390/11/14/3248; https://doi.org/10.3390/math11143248

New formulations are produced for problems associated with multiple cracks in the upper part of thermoelectric-bonded materials subjected to remote stress using hypersingular integral equations (HSIEs). The modified complex stress potential function method with the continuity conditions of the resultant electric force and displacement electric function, and temperature and resultant heat flux being continuous across the bonded materials’ interface, is used to develop these HSIEs. The unknown crack opening displacement function, electric current density, and energy flux load are mapped into the square root singularity function using the curved length coordinate method. The new HSIEs for multiple cracks in the upper part of thermoelectric-bonded materials can be obtained by applying the superposition principle. The appropriate quadrature formulas are then used to find stress intensity factors, with the traction along the crack as the right-hand term with the help of the curved length coordinate method. The general solutions of HSIEs for crack problems in thermoelectric-bonded materials are demonstrated with two substitutions and it is strictly confirmed with rigorous proof that: (i) the general solutions of HSIEs reduce to infinite materials if G1 = G2, K1 = K2, and E1 = E2, and the values of the electric parts are α1 = α2 = 0 and λ1 = λ2 = 0; (ii) the general solutions of HSIEs reduce to half-plane materials if G2 = 0, and the values of α1 = α2 = 0, λ1 = λ2 = 0 and κ2 = 0. These substitutions also partially validate the general solution derived from this study