Biodegradable jute cloth reinforced thermoplastic copolyester composites: Fracture and failure behaviour

• Autores: Acha, Betiana Andrea; Marcovich, Norma Esther; Karger Kocsis, J.
• Año de publicación: 2006
• Idioma: inglés
• Tipo de recurso: artículo
• Materia: Acoustic Emission; Biocomposite; Ecoflex; Failure; Film Stacking; Fracture; J Integral; Jute; Perforation Impact
• Institución: Consejo Nacional de Investigaciones Científicas y Técnicas

Jute cloth reinforced, fully biodegradable thermoplastic composites were produced by the film stacking technique, with a semicrystalline copolyester (Ecoflex) as the matrix material. The jute cloth content varied between 0, 20 and 40 wt-% in the sheets produced by hot pressing. Specimens cut from the sheets were subjected to in plane static and out of plane dynamic loading, and the related fracture and failure behaviours were studied. The jute cloth proved to be a useful reinforcement to enhance in plane mechanical properties. The J integral concept (J-R curve) was adopted to assess the fracture behaviour of the composites. Crack propagation in single edge notched tensile (SEN-T) loaded specimens was detected using position resolved acoustic emission (AE). Acoustic emission was also used to characterise the failure. Surprisingly, no beneficial effect of the jute cloth was observed in the out of plane, namely instrumented falling weight impact (IFWI) test. This could be explained by the characteristics of the jute cloth used (the large mesh size increases the tendency to disintegrate when stretched at high strain rates) and by its moderate adhesion toward the matrix. © 2006 Institute of Materials, Minerals and Mining.
Fil: Acha, Betiana Andrea. Technische Universitat Kaiserslautern; Alemania
Fil: Marcovich, Norma Esther. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones en Ciencia y Tecnología de Materiales. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Instituto de Investigaciones en Ciencia y Tecnología de Materiales; Argentina
Fil: Karger Kocsis, J.. Technische Universitat Kaiserslautern; Alemania