The Experts below are selected from a list of 312 Experts worldwide ranked by ideXlab platform
Y. L. Wang - One of the best experts on this subject based on the ideXlab platform.
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modeling of multi Strand Wire ropes subjected to axial tension and torsion loads
International Journal of Solids and Structures, 2015Co-Authors: Lei Xiang, Haiying Wang, Yafeng Guan, Y. Chen, Y. L. WangAbstract:A new model characterizing the response of a multi-Strand Wire rope subjected to axial tension and axial torque is presented in this paper. Apart from most of previous approaches which deal with a straight Wire Strand, the present model fully considers the double-helix structure in multi-Strand configuration. To be further, a new method to compute local deformation parameters (two curvatures and a twist defined by Love, 1944) of each Wire is introduced. The proposed model well predicts the global stiffness of the rope. It is found that different friction states between adjacent Wires can lead to quite a different distribution of local bending and torsion deformation of double-helix Wire. The variations of stresses in double-helix Wires along the rope axis are analyzed and the results show that torsion stress of a double-helix Wire can be neglected when the rope is subjected to axial tension (axial torsion is restrained). The present model provides a new way to estimate the local deformation and stresses at the Wire level, which sheds new insight into the understanding of the fatigue and failure behavior of the Wire rope. (C) 2015 Elsevier Ltd. All rights reserved.
Lei Xiang - One of the best experts on this subject based on the ideXlab platform.
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modeling of multi Strand Wire ropes subjected to axial tension and torsion loads
International Journal of Solids and Structures, 2015Co-Authors: Lei Xiang, Haiying Wang, Yafeng Guan, Y. Chen, Y. L. WangAbstract:A new model characterizing the response of a multi-Strand Wire rope subjected to axial tension and axial torque is presented in this paper. Apart from most of previous approaches which deal with a straight Wire Strand, the present model fully considers the double-helix structure in multi-Strand configuration. To be further, a new method to compute local deformation parameters (two curvatures and a twist defined by Love, 1944) of each Wire is introduced. The proposed model well predicts the global stiffness of the rope. It is found that different friction states between adjacent Wires can lead to quite a different distribution of local bending and torsion deformation of double-helix Wire. The variations of stresses in double-helix Wires along the rope axis are analyzed and the results show that torsion stress of a double-helix Wire can be neglected when the rope is subjected to axial tension (axial torsion is restrained). The present model provides a new way to estimate the local deformation and stresses at the Wire level, which sheds new insight into the understanding of the fatigue and failure behavior of the Wire rope. (C) 2015 Elsevier Ltd. All rights reserved.
Xin Cao - One of the best experts on this subject based on the ideXlab platform.
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the establishment of a mechanics model of multi Strand Wire rope subjected to bending load with finite element simulation and experimental verification
International Journal of Mechanical Sciences, 2018Co-Authors: Xin CaoAbstract:Abstract In view of lack of a general mechanics model and theoretical calculation formulas for the bending state of a Wire rope at present, a new mechanics modeling method for Wire rope under bending is put forward. Firstly, the change law of the secondary helix angle is analyzed, and the reasonable assumptions for the mechanics model are put forward. According to the elastic thin rod theory of Love and the conservation of energy principle, the mechanics model of multi-Strand Wire rope in bending state is established, and the theoretical formulas of bending stiffness and equivalent elastic modulus are derived. Taking 6 × 7 and 6 × 19 Wire ropes as examples, theoretical formulas are applied for calculation, meanwhile, the finite element simulation is carried out using ABAQUS and a special deflection measuring device is designed and manufactured to measure the large deformation deflection of the Wire ropes. The theoretical calculation results are compared with the finite element simulation results and the measurement results. The contrast results show that the theoretical results are closer to the measurement results than the finite element simulation results. The maximum deformation error of the Wire ropes free end between the theoretical results and the measurement results is 11.16%, which verifies the correctness of the mechanics model.
M Krishnan - One of the best experts on this subject based on the ideXlab platform.
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A SYMMETRIC LINEAR ELASTIC MODEL FOR HELICAL W I R E StrandS UNDER AXISYMMETRIC LOADS
2016Co-Authors: S Sathikh, M B K Moorthy, M KrishnanAbstract:Among several mathematical models for predicting the mechanical response of a helical Wire Strand to axisymmetric tension and torque derived in the literature over five decades, purely tensile Wire linear elastic models have the symmetry of a stiffness matrix. Curiously, in those models where Wire bending and torsion terms were included there was a lack of symmetry. In this paper the origin of the lack of symmetry in the earlier models has been identified and a symmetric model developed. The correct generalized strains for this purpose were derived using Wempner’s theory and verified using Ramsey’s theory. The validity of this model has been verified by comparing its results with that of earlier models and experiments available. This linear elastic symmetric model brings forth the much needed agree-ment between the global (Strand) and the local (Wire) responses which should help to simplify considerably the analysis of multi-layer Strands and multi-Strand Wire ropes. K e y words: Wire rope mechanics, cable mechanics, helical Strand mechanics, cored spring
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A symmetric linear elastic model for helical Wire Strands under axisymmetric loads
The Journal of Strain Analysis for Engineering Design, 1996Co-Authors: S Sathikh, M B K Moorthy, M KrishnanAbstract:AbstractAmong several mathematical models for predicting the mechanical response of a helical Wire Strand to axisymmetric tension and torque derived in the literature over five decades, purely tensile Wire linear elastic models have the symmetry of a stiffness matrix. Curiously, in those models where Wire bending and torsion terms were included there was a lack of symmetry. In this paper the origin of the lack of symmetry in the earlier models has been identified and a symmetric model developed. The correct generalized strains for this purpose were derived using Wempner's theory and verified using Ramsey's theory. The validity of this model has been verified by comparing its results with that of earlier models and experiments available. This linear elastic symmetric model brings forth the much needed agreement between the global (Strand) and the local (Wire) responses which should help to simplify considerably the analysis of multi-layer Strands and multi-Strand Wire ropes.
Y. Chen - One of the best experts on this subject based on the ideXlab platform.
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modeling of multi Strand Wire ropes subjected to axial tension and torsion loads
International Journal of Solids and Structures, 2015Co-Authors: Lei Xiang, Haiying Wang, Yafeng Guan, Y. Chen, Y. L. WangAbstract:A new model characterizing the response of a multi-Strand Wire rope subjected to axial tension and axial torque is presented in this paper. Apart from most of previous approaches which deal with a straight Wire Strand, the present model fully considers the double-helix structure in multi-Strand configuration. To be further, a new method to compute local deformation parameters (two curvatures and a twist defined by Love, 1944) of each Wire is introduced. The proposed model well predicts the global stiffness of the rope. It is found that different friction states between adjacent Wires can lead to quite a different distribution of local bending and torsion deformation of double-helix Wire. The variations of stresses in double-helix Wires along the rope axis are analyzed and the results show that torsion stress of a double-helix Wire can be neglected when the rope is subjected to axial tension (axial torsion is restrained). The present model provides a new way to estimate the local deformation and stresses at the Wire level, which sheds new insight into the understanding of the fatigue and failure behavior of the Wire rope. (C) 2015 Elsevier Ltd. All rights reserved.