Affiliation:
1. Michael A Welch (Consulting Engineers) Limited , West Lancashire , UK
Abstract
Abstract
The purpose of this paper is to present a paradigm, or guide, to the analysis of preloaded bolted joints made using multiple bolts. Classical analysis methods are applied to the interaction of the joint elements subjected to combinations of both in-plane and out-of-plane loads and moments. The distribution of the external loads and moments within the preloaded joint is determined in relationship to individual bolts. An analysis of loads and stresses in individual bolts and dowels along with flange bending and thread shear in tapped or threaded holes is developed. The article brings together a number of concepts and links them into a practical design analysis process that is applicable for many cases of preloaded bolted joints and are adequate to demonstrate the structural integrity of each element of the joint. Interpretation of results, within the context of design standards, is provided. In some cases finite element methods may be more appropriate, and the methods discussed can be used in the validation process.
Reference7 articles.
1. [1] Welch, M. “Classical Analysis of Preloaded Bolted Joint Load Distributions”, International Journal of Structural Integrity 9 (4), pp. 455 – 464, 2018. DOI: 10.1108/IJSI-07-2017-004510.1108/IJSI-07-2017-0045
2. [2] Verein Deutscher Ingenieure (Association of German Engineers). VDI 2230 Part 1. 2003, “Systematic calculation of high duty bolted joints with one cylindrical bolt”, Verein Deutscher Ingenieure, Dusseldorf, 2003.
3. [3] British Standards Institution. BS 7608:1990, “Code of practice for Fatigue design and assessment of steel structures”, British Standards Institution, London.
4. [4] Welch, M. “Analysis of Bolt Bending in Preloaded Joints”, Journal of Mechanical Engineering – Strojnícky časopis 68 (3), pp. 183 – 194, 2018. DOI: 10.2478/scjme-2018-003410.2478/scjme-2018-0034
5. [5] British Standards Institution. BS 3580:1964, “Guide to the design considerations on: The strength of screw threads”, British Standards Institution, London.
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