Analytical and finite element modelling of the elastic-plastic behaviour of metallic strands under axial-torsional loads

被引:44
作者
Foti, Francesco [1 ]
di Roseto, Alessandro de Luca [2 ]
机构
[1] Politecn Milan, Dept Civil & Environm Engn, Pzza L da Vinci 32, I-20133 Milan, Italy
[2] Univ Loughborough, Sch Civil & Bldg Engn, Sir Frank Gibb Bldg, Loughborough LE11 3TU, Leics, England
关键词
Strands; Axial-torsional loads; Elastic-plastic behaviour; Finite element method; Curved thin rod theory; HELICALLY ARMORED CABLES; WIRE ROPE STRANDS; THEORETICAL PREDICTIONS; TENSILE LOADS;
D O I
10.1016/j.ijmecsci.2016.06.016
中图分类号
TH [机械、仪表工业];
学科分类号
0802 ;
摘要
In this work a new formulation for modelling the elastic-plastic behaviour of metallic strands subjected to axial-torsional loads is presented. Simple and accurate cross sectional constitutive equations are derived, fully accounting for the evolution of plastic deformations in the wires, starting from a description of the internal structure of the strand. The proposed approach is suitable both for straightforward analytical calculations as well as for implementation into finite elements for the large-scale structural analyses of cable structures. A full three-dimensional (3D) finite element (FE) model, based on a parametric description of the strand internal geometry, is also developed. The results of both the FE model and the analytical formulation are validated with reference to a well-documented physical testing campaign and a well-established linearly elastic literature model. Additional analyses are then performed to carefully assess the validity of the proposed mechanical formulation, for a wide range of strand construction parameters, by means of systematic comparisons against the results of the 3D FE model and of a recent linearly elastic literature model. (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码:202 / 214
页数:13
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