The present article focuses on changes in the mechanical properties of an all-oxide fiber-reinforced composite following long-term exposure (1000 h) at temperatures of 1000–1200°C in air. The composite of interest derives its damage tolerance from a highly porous matrix, precluding the need for an interphase at the fiber–matrix boundary. The key issue involves the stability of the porosity agai...

The present work focuses on the characterization of in-plane and out-of-plane behavior a three-dimensional angle-interlock woven composite. In-plane tensile compression tests, short beam shear tests through-the-thickness compressive were carried out to assess mechanical composite material. results are presented in terms stress–strain responses, elastic moduli, failure strains strengths. In addi...

We analyze, with the computer code LS-DYNA, three-dimensional (3D) transient deformations of a 10-layer woven Kevlar armor held in a square steel frame and impacted at normal incidence by a 9 mm FMJ (full metal jacket), 124 grain projectile. The composite armor is discretized into weft and warp yarns to simulate its woven structure. The yarn is modeled as a 3D continuum. We consider failure of ...

This study focuses on the shear-out failure mode of a 3D-woven composite lug. The damage scenario leading to is analyzed based tensile test lug shown be driven by matrix damages generated in-plane shear. No yarn observed. A model proposed capture combines Onera Damage Model for Polymer Matrix Composite (ODM-PMC) with Mazars-like evolution law. special attention paid transition between both laws...

The improvement of engines is one the ways to diminish fuel consumption in civil aircrafts, and Open Rotors are best promises order achieve a sensible efficiency increment. These have large composite blades that could, event failure, impact against fuselage, totally or partially. In this case, fragments could behave as impactors. design fuselages for adopt these new future, it necessary underst...