Assessments of bolted joints can be performed for a number of reasons. Before starting any FE modelling of bolted joints it is important that the analyst considers the purpose of the analysis and plans it. A summary of typical aspects which should be considered during the planning will be covered.

The structural and thermal behaviour of bolted joints can be affected by a range of factors, including pretension, relaxation, friction and gasket properties. A discussion of factors which may be relevant will be given.
A number of FE modelling techniques can be used to analyse bolted joints. These will be described, along with their benefits and limitations.

In this blog post, we will be showing an analysis of a bolted joint. The joint comprises of two flat plates that are made of carbon fiber reinforced polymer material (CFRP). Both plates have the same 8 ply layup (symmetric), and have been modelled with stacked continuum shell elements. Ply failure modelling has been considered in terms of Hashin failure criterion damage initiation and fracture energy damage evolution.

In this blog post, we will be discussing about the different methods in modeling bolted connections with Abaqus FEA. At the last section of the post,we will be showcasing a bolted connection, incorporating a pretensioned bolt. Flanged connections are used extensively in most engineering disciplines. They provide a way of interconnecting  various (metallic, plastic etc.) components and their design is often critical for the strength of various components (e.g. bolt strength) and sealing of the assembly.