Experimental study and numerical simulation of magnetization involved in S235 sheets used in the construction of ship hulls

• Published in: Results in physics Vol. 14; p. 102430
• Main Authors: Mouas, L'Hocine, Mohellebi, Hassane, Ould Ouali, Samy Hassani
• Format: Journal Article
• Language: English
• Published: Elsevier 01.09.2019
• ISSN: 2211-3797; 2211-3797
• DOI: 10.1016/j.rinp.2019.102430

Thermal stress can be used to control the strength of the magnetic field generated by ferromagnetic materials. This effect is used to reduce magnetic related risks in a ship hull. In the present study, we are going to discuss the usefulness of this technique to reduce magnetic losses in marine sheets – used in the construction of ship hulls – by using a ferromagnetic material, namely structural steel (S235). The characterization of this metal is made by using the Epstein frame in an alternating field at 50 Hz frequency. A recent study was conducted at the Algerian Electro-industries company in a city named Azaaga in Kabylia. The experiment consisted of two samples of four sheets of steel of 4 mm thick. One sample was submitted to a normalization annealing temperature of 912 °C for thirty minutes, and then followed by a period of slow cooling in the same oven. Then a comparison is made between the results of the experiment with and without normalization annealing temperature. The experimental B-H curves obtained are then integrated successfully in the finite elements code developed in MATLAB software, using the Rayleigh hysteresis model. Simulations results are in accordance with the preceding measurements.