Factors Affecting Contact Pressure Distribution on Bolted Joint Interface

Abstract:

To investigate factors affecting contact interface pressure distribution in bolted joint, a parametric model was established by ANSYS APDL language in this paper. The contact pressure distribution on bolted joint interface was obtained through interpolating and revising contact interface forces. It is observed that the position of peak interface pressure is between the edge of bolt hole and the edge of bolt head. The contact pressure linearly changes with the bolt load while the distribution trend and radius remain unchanged. When the total thickness of clamped members is fixed, the contact pressure distribution varies from concentrated to uniform with the increasing member thickness ratio, and the maximum contact radius is reached while the member thickness is equal. When one clamped member thickness is fixed, increasing the other’s thickness can also reduce the contact pressure concentration, but the effect gradually weakens. Increasing bolt diameter can slightly increase the absolute contact radius but decrease the normalized contact radius. The inclusion of a washer under the nut can slightly promote interface clamping.

• Periodical: Key Engineering Materials (Volume 693)
• Pages: 126-133
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.693.126
• Online since: May 2016
• Authors: Jing Ping Liao*, Ding Wen Yu, Ping Fa Feng
• Keywords: Bolted Joint, Influencing Factors, Interface Pressure Distribution, Parametric Model

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