Marine NDT

Yacht hulls and rudders are usually made from sandwich material constructions which give good bending properties required for large, curved and lightweight-sections. Often these sandwich components are manufactured from aluminium, glass-fibre (GFRP) or carbon-fibre (CFRP) laminates with a hard-foam or honeycomb core sandwich material.

Sandwich components are most susceptible to disbonding, crushed & cracked cores and node-bond splits, usually as a result of in-service, impact damage. These types of defects can be inspected using Laser Shearography within seconds achieving inspection rates of multiple m2/min making it the best technique for both effectiveness and efficiency.

A Skin-to-Core disbond initiated a weakened core splice and propagated further due to fatigue stresses from sailing along the waterline. The location and progression of disbonding is marked. The phase map at end location of disbond is shown. (Courtesy of R.Gregory at Sheared Image NDT LLC)

Application Notes

Hulls and Rudders – Marine NDT – Video

This presentation is an overview of Laser Shearography applications used for the inspection of Hulls & Rudder in Marine NDT, examples include: disbonding, crushed & cracked cores and[…]

Heat Excitation Solutions for Laser Shearography NDT Quality Control and Inspections

By essence, a defect weakens the structural properties of a component. Its mechanical behavior under a load is consequently modified. This modification can be localized and of very little im[…]

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