Sardou sas has worked since 1983 on torsion beam a highly stressed structure.during the composite coils spring development, we have had to face to very low fatigue life due to poor epoxy DGEBA properties. Springs were destroyed too early and were sagging a lot.So, we have developed since 2005 a unique epoxy characterized by a mineral structure of 3 microns long and 18 nanometers wide carrying up to 100 000 EPOXY functions.This material has been successfully developed for composite coils springs increasing fatigue life expectancy from 50 000 up to 2 000 000 cycles.We have applied EPOSIL® to test specimens as well than to composite “C” springs. The following will describe experiments and SUCCESFUL mains test results gathered up to now
Abstract
Fire is a dramatic issue in aircraft nowadays, especially for composite air craft. An additional issue is the dangerous use of flammable Li-Ion batteries in many devices. To minimize fire issues, it is proposed to produce aircraft interiors, fire doors, cargo bay walls, and cargo containers that are able to contain a fire inside them, with our ceramic composite called TOUGHCERAM®. It is low-cost, ceramic, damage tolerant, and flexible between minus 100°C and plus 350°C. TOUGHCERAM® poly-crystalizes between 20°C and 110°C and can be reinforced with fibers (carbon or basalt). It will survive 90 minutes under direct contact with a propane torch of 1900°C. TOUGHCERAM® does not burn or smoke.This paper will explain how it is possible to develop a fully mineral-ceramic offering with unique mechanical, fire, and blast containment properties.
