Influence of void content and morphology on the creep behavior on glass/epoxy composites

• Autor(a) principal: Alves, Fillip Cortat [UNESP]
• Data de Publicação: 2021
• Outros Autores: Monticeli, Francisco Maciel [UNESP], Neves, Roberta Motta, Voorwald, Herman Jacobus Cornelis [UNESP], Cioffi, Maria Odila Hilário [UNESP], Ornaghi, Heitor Luiz
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://dx.doi.org/10.1016/j.coco.2021.100712; http://hdl.handle.net/11449/208508
• topic: Creep behavior; Dynamic mechanical analysis; Void content

This study aimed to evaluate the dynamic mechanical properties and the creep behavior of glass/epoxy composites containing different void contents. A 3D reconstruction using X-ray microtomography (MCT) was done to determine void content, position, and morphology. Moreover, dynamic mechanical analysis over a wide temperature range and creep tests using different temperatures (from 30 °C to 210 °C) and stress levels (1, 5, and 10 MPa) were conducted. It was found that the void content interfered with the stress transferring, noted by a decrease in the storage modulus in the glassy region and by a higher creep deformation. Moreover, as the composites pass through the glass transition region, a more abrupt decay is observed due to higher dissipation energy in a shorter time. The trend of creep behavior by temperature and stress level is equally affected by the void content and morphology.