Hafiz Muhammad Waqas ^1,2* Hafiz M. Waqas ¹ Syed M. Naqvi ³ Umair MUNIR ³ Sohaib Z. Khan ⁴ Elsayed Fathallah ⁵ Mahmoud Helal ⁶

• ¹ School of Mechanical and Electrical Engineering, Harbin Engineering University, Harbin, Heilongjiang Province, China
• ² NFC Institute of Engineering and Fertilizer Research, Faisalabad, Punjab, Pakistan
• ³ Department of Mechanical Engineering, NFC Institute of Engineering and Fertilizer Research, Faisalabad, Punjab, Pakistan
• ⁴ 3Department of Mechanical Engineering, Faculty of Engineering, Islamic University of Madinah, Medina, Saudi Arabia
• ⁵ Civil Engineering Department, MTC Kobry Elkobba, Egypt Ships and Submarines Engineering Department, Military Technical College, Cairo, Cairo, Egypt
• ⁶ 3Deparment of Mechanical Engineering, Faculty of Engineering, Taif University, Box P.O 1109, Taif 21944, Saudi Arabia., Taif University, Ta'if, Saudi Arabia

The objective of this investigation was to ascertain whether a pressure hull could be fabricated using wood sandwiched composites and achieve a substantial reduction in weight when compared to a steel pressure hull.The key purpose of this study was to introduce wood in sandwiched composite submersible pressure hulls. Five different types of woods, i-e bamboo, paulownia, balsa, mulberry and engineered mulberry were used for the analysis. as a core material by using a A parametric analysis was done to decrease the weight and to raise the stability under hydrostatic force. Design The design of the sandwiched composite pressure hull depends on laminate layers, fiber angles, material system, thickness of the face sheets and core. This task presents a parametric design analysis and to find out the optimized design for a pressure hull submerged under the hydrostatic pressure by means of Finite Element Analysis (FEA). Material failure criteria were used to examine the failure of composite face sheets. Overall stability was examined by using the buckling factor and maximum stress (MS) failure criterion. Various composite materials face sheets were employed, and numerous kinds of woods were implemented as a core with angle configuration of [0m/90n] and [45m/-45n]. The angle configuration of [45 14 /-45 14 ] 28 with Paulownia core and CFRP face sheet, shows the minimum weight of 11338 kg, which is less than around 20000 kg of conventional steel pressure hull. The values of 𝐹𝑆 𝑇𝑊 , 𝐹𝑆 𝑇𝐻 , and 𝜆 were recorded 3.20, 2.43, and 1.44 respectively, with a von-Mises stress of 160.75 MPa . The thickness of each face sheet and core was obtained 56 mm and 140 mm respectively.