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| Rubber Tongue Seal Design Assessment for Offshore Applications by Wilde FEA
11 January 2007
 Crux Products Ltd asked Wilde FEA to conduct an assessment of their Tongue Seal to determine the behaviour of the seal during installation, the performance of the seal under the influence of the grout and to estimate the maximum load carrying capacity of the seal.
A non-linear finite element analysis was conducted within ANSYS. A cross sectional representation in the region of the Tongue Seal was developed and analysed using 2-D axisymmetric elements. A hyperelastic material model was used to capture the behaviour of the rubber Tongue Seal. Fabric reinforcement was included in designs where additional sealing capacity was required. Frictional contact conditions were used to capture the seal's interaction with the surrounding pile and pile sleeve and to monitor its sealing characteristics. A multi-stage analysis estimated how the seal would deflect during installation and operation and also assessed the performance gains of increasing the thickness of the fabric reinforcement.
"It was very useful to us to get a feeling for how the seal behaves from before fixing to fixed. We would certainly include this phase for future jobs where we plan to use straight tooling for manufacture"
Managing Director, Crux Products Limited
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