Hello,

i need to to determine the sandwich panel flexural strength and stiffness following ASTM C393 which is updated to ASTM D 7250.

The face sheet is of carbon fiber(phenolic resin) and core of Aluminium AL5056.the strength values for the Aluminum is quoted in the manufacturer's literature(coupon test results).

i am looking for guidelines for selection of specimen dimensions and loading configuration and most importantly the guidelines on the test fixture setup with recommended geometries and specifications(material of load application apparatus,load span,recommended geometry and material of reaction supports etc).

thank you,

regards,      

This all sounds very impressive, but.
Perhaps if you explained it to us as if you were talking to a child some of us would actually understand what you are talking about.
Fred

Are you making a new product or a improved composite version of a current item ?

If your doing a improved version do like for like test,an take your baseline figure from the original item

I havent done any testing in a long time so am rusty, but to some extent it depends on what type of failure you're expecting. For example, if using skins that have fibres 90 degrees to the length, then skin failure could occur quickly as they become indented. Also depends on things like density of your alu core.