Banca de QUALIFICAÇÃO: TOMAS BARROS VASCONCELOS

Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
STUDENT : TOMAS BARROS VASCONCELOS
DATE: 08/04/2024
TIME: 14:00
LOCAL: Plataforma de Videoconferência
TITLE:

Fatigue performance of double-double glass/epoxy laminates

KEY WORDS:

Double-double laminates, fatigue, stress concentration

PAGES: 104
BIG AREA: Engenharias
AREA: Engenharia de Materiais e Metalúrgica
SUBÁREA: Materiais Não-Metálicos
SPECIALTY: Materiais Conjugados Não-Metálicos
SUMMARY:

Double-double (DD) configuration has been proposed as a new concept in which a double set of double helix [±ϕ/±ψ]n angles are stacked up to form a composite laminate.  This concept promises significant advantages over conventional layups for composite design optimization and manufacturing. This experimental study evaluated the performance of two elastically in-plane equivalent glass/epoxy laminates suited for wind blade turbine applications: a quadriaxial (Quad) [±45/(0/90)3]s and a double-double (DD) [±15/±75]4T. Mechanical tests were performed under cyclic uniaxial tensile-tensile load using unnotched and open hole specimens. Delamination initiating from the free edges resulted in premature failure of the unnotched DD specimens.  For open hole specimens, fatigue tests results obtained from both stacking sequences showed similar performance. Ultimately, the study presented constitutes a valuable contribution to the understanding of fatigue behavior of double-double glass/epoxy laminates subjected to tensile cyclic loading.

COMMITTEE MEMBERS:
Presidente - 1202134 - JOSE DANIEL DINIZ MELO
Interno - 1338331 - RAIMUNDO CARLOS SILVERIO FREIRE JUNIOR
Externo ao Programa - 1064594 - EVANS PAIVA DA COSTA FERREIRA - UFRNExterno à Instituição - CARLOS ALBERTO CIMINI JUNIOR - UFMG
Externo à Instituição - LUCAS LISBÔA VIGNOLI - UFRJ