Development of strength and stiffness requirements to hull framing beams made of polymeric composites

Труды Крыловского государственного научного центра

Nikolay N. Fedonyuk¹ 

[1] Krylov State Research Centre;

关键词: hull;    beam;    polymeric composite material;    strength;    stiffness;    stability;    regulations;   

DOI  :  10.24937/2542-2324-2019-3-389-29-36

来源: DOAJ

【 摘 要 】

Object and purpose of research. This paper studies hull framing beams made of polymeric composite materials and discusses how to develop strength, stiffness and stability requirements for them. The main purpose of this research is to perform a comprehensive analysis of these parameters and understand their possible implications in terms of beam geometry and weight. Materials and methods. The study is based on existing design requirements and strength calculation rules for hull framing beams made of polymeric composites. The basis for investigation was the theory of complex beam bending taking into account transverse shear strains in the web. Main results. It has been shown that current bending limitations in a number of cases lead to considerable strength and stability margins of hull beams, thus increasing their weight per unit length. Meanwhile, minor deviations from bending requirements, under condition that strength and stability requirements are satisfied in full, may result in considerable reduction of beam weight. Conclusion. Bending limitations for composite hull beams must be justified depending on the importance of specific beam, as well as depending on its operational conditions and load. Beam design must be, first of all, focused on ensuring their bearing capacity. The results of this work will be helpful for designers of composite hulls, enabling them to reduce the weight of structures.

【 授权许可】

Unknown