CHARACTERIZATION OF COMPOSITE MATERIALS USING ACOUSTIC EMISSION TEST

Speaker:
NARDONI, GIUSEPPE; I&T NARDONI INSTITUTE; Italy

Authors:
Nardoni, D.; I&T Nardoni Istitute; Italy
Nardoni, G.; I&T Nardoni Istitute; Italy
Nardoni, P.; I&T Nardoni Istitute; Italy
Turconi, M.; I&T Nardoni Istitute; Italy

ID: ECNDT-0202-2018
Session: Aerospace 6
Room: G1
Date: 2018-06-13
Time: 13:50 - 14:10

The paper is the result of a 2 years research made in collaboration with Aerospace company Leonardo.
The object was to evaluate the behavior of different type of composite with carbon fiber and glass fiber.
The samples were tested on a three point bending and monitoring continuously during the application of load and full test up to the failure.
Characteristic of the test was to maintain constant the load and verify after two and three days if really no fractures happen.
Only in these conditions the load will slowly increased and again time over.
The research has taken to the following conclusions: there is a load (Delay Cracking Load) at which a slowly cracking phenomena start also maintaining constant the load.
The importance of the research was that only through acoustic emission is possible to determine for each type of composite the DCL (Delay Cracking Load).