ABSTRACT

Bonded tubular joints have found use in various engineering and industrial applications, providing an efficient and durable method for joining tubular substrates while ensuring good sealing properties. In this work, a novel design approach is proposed for bonded flexible tubular metal-polymer joints, subjected to large torsional rotations under a complex loading and large deformations of the adherends. Two distinct finite element models were developed for this purpose. One to optimize the joint behaviour for small rotation values and another to predict the overall joint strength using cohesive zone modelling and introducing the effect of buckling in the polymeric tubular adherends. Different polymeric materials were also considered in order to assess the influence of hyperelastic properties in the joint behaviour and strength. A good agreement between experimental results for three different joint layouts and the numerical results was obtained. Results show that for smaller rotation values, a 2D model can be used to accurately predict the joint behaviour. Nonetheless, for high rotation values and large deformation of the polymer materials a complex 3D model, including the effect of buckling, is necessary to predict the joint strength.

摘要

获得了三种不同接头布局的实验结果与数值结果之间的良好一致性。结果表明，对于较小的旋转值，二维模型可用于准确预测关节行为。尽管如此，对于聚合物材料的高旋转值和大变形，需要一个复杂的 3D 模型（包括屈曲效应）来预测接头强度。