Application > Composite structures

Composites

Comprehensive solution for everything related to composites

Background

In recent years, the use of  composite materials has dramatically increased in sectors like aerospace due to the weight redution it offers. Composites are essentially materials made up of 2 or more phases or constituent parts, predominantly plastics reinforced with carbon fibers.
They can be formed into various shapes to increase their strength and layered with fibers running in a different directions, to allow designers to form structures with unique properties. In this case, we refer to Fiber reinforced polymers where the fibers are typically carbon (CFRP -carbon fiber reinforced polymer), fiberglass and aramid. There are others such as basalt and boron reinforced.

Issues

Due to its wide spread use, composite-made structures have grow in complexity and size, posing a significant challenge for the traditional way of inspecting such structures, typically using ultrasounds at zero degree transducers in order to detect porosity or delaminations. Rigid wedges do not acommodate for sudden changes in the curvature of the part. With the advent of rubber tyre scanners with integrated immersion probes. Phased Array technology also added an important productivity boot to the workflow

But one other issue persists when data acquisition is considered in a true XYZ arrangement. Most common market solutions propose a rigid XY fixture that is positioned in the surface of the component via suction pads. This arrangement has the inconvenience of requiring multiple takes if the part is complex enough.

PAUT and Position encoding solution

Partnering with Hexagon, we combined the precision of the Romer Absolute Arm series with the performance of our PAUT 32/128 module . Bringing the methodology of the metrology world into Non Destrutive Testing creates an unpararel workflow in terms of data aquisition and an unprecendent accuracy of flaw position. The 6 degrees of freedom of this solution allow for a free flow scan pattern, since the inspectors are not limited to the typical scan pattern of rigid scanners.

Starting with a CAD model of the part to be inspected or with a laser scanned model of the part itself – using HEXAGON’s RS5 laser scanner – the scan can be done in multiple sequences if needed or with different PAUT probes or UT probes if the part’s geometry require a smaller footprint on a specific area. In the end, all acquired data will be mapped to the surface or mesh of the part’s model with all the pertaining volumetric information of that part.

HEXAGON’s CMM Arm with the RS6 scanner for surface laser scanning. 

Acquiring PAUT data mapped onto the previously acquired mesh from the part’s surface.