Krysiak Piotr, Błachut Aleksander, Kaleta Jerzy
Military Institute of Engineer Technology, 136 Obornicka Street, 50-961 Wroclaw, Poland.
Department of Mechanics, Materials and Biomedical Engineering, Faculty of Mechanical Engineering, Wroclaw University of Technology, 27 Wybrzeże Wyspiańskiego Street, 50-370 Wroclaw, Poland.
Materials (Basel). 2021 Nov 20;14(22):7037. doi: 10.3390/ma14227037.
This paper analyses the issues relative to the modelling of tubular (cylindrical) composite structures. This paper aims to describe the design of a multi-layer structure of filament-wound composite pipes where, after loading, the hoop-stress distribution would be as uniform as possible. That would allow the mass of the composite to decrease while maintaining the proper mechanical strength. This publication presents the development of a calculation model dedicated to mono- and multi-layered tubular composite structures. The equations describing the stress pattern were based on the Lamé Problem, whereas to describe the modelled structures, an anisotropy coefficient was introduced and interlayer pressures values were determined. To verify the calculations, experimental studies were performed. The test specimens were fabricated by winding fibre bundles around a steel core (as rings with an internal diameter of 113 mm and a height of 30 mm). For the test, the method of pressing a conical ring into a split ring, which acts on the internal surface of the tested cylindrical sample, was selected. The operation of the test rig (test stand) was simulated using the Finite Element Method (FEM). Measurements with strain gauges were conducted during the experiments.
本文分析了与管状（圆柱形）复合结构建模相关的问题。本文旨在描述一种纤维缠绕复合管多层结构的设计，在加载后，环向应力分布应尽可能均匀。这将在保持适当机械强度的同时减少复合材料的质量。本出版物介绍了一种专门用于单层和多层管状复合结构的计算模型的开发。描述应力模式的方程基于拉梅问题，而为了描述建模结构，引入了一个各向异性系数并确定了层间压力值。为了验证计算结果，进行了实验研究。测试样本是通过将纤维束缠绕在钢芯上制成的（内径为113毫米、高度为30毫米的环）。对于测试，选择了将锥形环压入开口环的方法，该开口环作用于测试圆柱形样本的内表面。使用有限元方法（FEM）模拟了试验台（试验架）的运行。实验过程中使用应变片进行了测量。
