Bending and torsion testing of composite I beam using strain gauges

genuinepseudo

Hi
I am a student of Aeropsace engineering working on my project ie bending and torsion testing of wing main spar that is an I beam. I have chosen glass fiber epoxy as composite material. The problem is about the strain gauges i.e. which are to be used their orientation and their placement on the specimen. Please help
Regards..
faizan