The Flexibility of a Tubular Welded Joint in a Vehicle Frame

Lubkin, James L.

doi:10.4271/740340

Cited by 8 publications

(3 citation statements)

References 1 publication

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“…Lubkin [14] attempted to determine the eect of thē exibility of joint connections on a tubular H-frame and stated that a typical welded joint cannot be represented by a rigid joint in frame analysis. The natural frequencies of the frame were used to compare the experimental and the numerical results.…”

Section: Finite Element Analysis Of Box Sectionsmentioning

confidence: 99%

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Automotive box section design under torsion: Part 1: Finite element modelling strategy

Lee

Pine

Jones

2000

Proceedings of the Institution of Mechanical Engineers, Part D:

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Behaviour under torsion is an important performance-related property of automotive box sections. A previous experimental study has identi®ed joining technique, section thickness and section area as the major in¯uencing factors on the torsional behaviour of box hat sections. Using these test results as the basis, a ®nite element modelling strategy that can simulate the behaviour of adhesively bonded and spot-welded automotive box sections subjected to torsion is presented. The numerical study investigated the eects of material representation, mesh density and layout, and joining technique representation on the stiness, elastic limit and ultimate strength of the box sections. The ®nal model, calibrated and validated against test results obtained from previous work, was used in an extensive study, presented in the companion paper (Part 2), to further the understanding of the behaviour of torsionally loaded box sections and its implications on weight reduction of automotive structures.

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Section: Finite Element Analysis Of Box Sectionsmentioning

confidence: 99%

“…Neither O'Connor [13] nor Lubkin [14] made any attempt to represent the weld in terms of dimensions or material properties. Both indicated that rigid bar elements used to represent the weld would probably overestimate the stiness of the joint.…”

Section: Finite Element Analysis Of Box Sectionsmentioning

confidence: 99%

Automotive box section design under torsion: Part 1: Finite element modelling strategy

Lee

Pine

Jones

2000

Proceedings of the Institution of Mechanical Engineers, Part D:

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“…Based on the present investigation and those reported in the literature, [15][16][17][18] the stiffness of the structural joints (or simply the joint stiffness) at various locations in the car body plays an important role in the resulting structural responses associated with both the crashworthiness responses and the NVH characteristics. The effect of the joint stiffness on the static bending and the torsion rigidity has been investigated in previous studies; [19][20][21] however, this paper examines the effect of the joint stiffness on both the crash responses and the vibration responses of a high-fidelity full-vehicle model. 22,23 A material-based approach for joint stiffness modeling is presented in the second section; the crash and vibration analysis models, response approximations, and design sensitivity analysis results are presented in the third section; a joint stiffness optimization problem and associated results are presented in the fourth section with concluding remarks in the fifth section.…”

Section: Introductionmentioning

confidence: 99%

Joint stiffness analysis and optimization as a mechanism for improving the structural design and performance of a vehicle

Kiani

Motoyama

Rais‐Rohani

et al. 2014

Proceedings of the Institution of Mechanical Engineers, Part D:

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An approach is presented to evaluate the structural performance of a vehicle model in terms of the joint stiffness. Seven major joints on the left and right sides of the vehicle body are identified, and each joint is decomposed in the finite element model and assigned a separate set of material properties. By adjusting the elastic modulus of each structural member, the effects of the joint stiffness on the full and offset frontal impacts as well as the vibration characteristics are examined. Latin hypercube sampling is used in the design of experiments to approximate the acceleration, the intrusion distance, and the fundamental vibration frequencies using full quadratic polynomial response surface models. Through direct differentiation, the sensitivities of the crash responses and the vibration responses to the joint stiffness are calculated. A constrained multi-objective optimization problem is formulated and solved to improve the structural responses by adjusting the stiffness at each joint. Evaluation of the car body structure based on the optimum joint stiffness showed a superior performance relative to the baseline model without a weight penalty. The results of both the sensitivity analysis and the design optimization are presented and discussed.

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New accurate efficient modeling techniques for the vibration analysis of T-joint thin-walled box structures

Kim

et al. 2002

International Journal of Solids and Structures

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The Flexibility of a Tubular Welded Joint in a Vehicle Frame

Cited by 8 publications

References 1 publication

Automotive box section design under torsion: Part 1: Finite element modelling strategy

Automotive box section design under torsion: Part 1: Finite element modelling strategy

Joint stiffness analysis and optimization as a mechanism for improving the structural design and performance of a vehicle

New accurate efficient modeling techniques for the vibration analysis of T-joint thin-walled box structures

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