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Technical Discussions
Jean-Pascal
Engineering, Professor
Haute Ecole d'Ingénierie et de Gestion Vaud, Switzerland, Joined Jul 2007, 4

Jean-Pascal

Engineering, Professor
Haute Ecole d'Ingénierie et de Gestion Vaud,
Switzerland,
Joined Jul 2007
4
10:36 Jun-22-2020
Ultrasonic testing on HexMC composite parts

Hi,
I have to control a composite part made with a material supplied by Hexcel (HexMC). https://www.hexcel.com/Products/HexMC-Materials-for-Industries
I have difficulty doing this with ultrasound because the attenuation seems huge and very irregular.
Does anyone have experience sharing with this type of composite.
Thank you
JP

 
 Reply 
 
Godfrey Hands
Consultant,
PRI Nadcap, United Kingdom, Joined Nov 1998, 307

Godfrey Hands

Consultant,
PRI Nadcap,
United Kingdom,
Joined Nov 1998
307
09:26 Jun-29-2020
Re: Ultrasonic testing on HexMC composite parts
In Reply to Jean-Pascal at 10:36 Jun-22-2020 (Opening).

Hi Jean-Pascal,
I assume here that you are writing about a sandwich structure with a honeycomb as the centre.

This is normally inspected in through transmission mode and depending on the honeycomb material, with ultrasound frequencies between 1 and 5 MHz.

The most common inspection is water-jet, but simple mechanical "yokes" to hold two probes in axial alignment can be used in direct contact.

I hope his helps.

Godfrey

 
 Reply 
 
Simon Amallraja
Consultant, Advanced NDT Methods
Anu Consultants, India, Joined Aug 2013, 43

Simon Amallraja

Consultant, Advanced NDT Methods
Anu Consultants,
India,
Joined Aug 2013
43
14:03 Jun-29-2020
Re: Ultrasonic testing on HexMC composite parts
In Reply to Jean-Pascal at 10:36 Jun-22-2020 (Opening).

Hi Sir,

You can test the CFRP or GFRP in Green stage and as well in fired stage by following methods.

1. use High Power and High Energy UT Pulser Receiver to avoid attenuation. You can use Pulse Echo or Through Transmission (Non Contact) modes for inspection. You can use as low as 200 KHz probes for this testing at green and Fired stages.
If the sample is fully cured stage, you can use Gas Matrix Probes with delay line as per thickness.
2. You can use Non Contact UT System as low as 50 KHz probes for 2D inspection of Laminates, Sandwich panels etc.,
3. You can use Laser Shearography - which is a non contact one and can be sued for any shape and size depends on the model.

Send me a private mail, if you need more details of the above products.

Good Luck

D. Simon Amallraja
If the sample

 
 Reply 
 

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