Banca de DEFESA: RAFAELA JORDANIA MARINHO FRANCA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : RAFAELA JORDANIA MARINHO FRANCA
DATE: 23/01/2026
TIME: 09:00
LOCAL: https://meet.google.com/yvh-yvke-utv
TITLE:

Study of Damage Tolerance in Double-Double Glass/Epoxy Composites under Low-Velocity Impact

KEY WORDS:

Double-double laminate; GFRP; CAI; LVI

PAGES: 103
BIG AREA: Engenharias
AREA: Engenharia Mecânica
SUBÁREA: Mecânica dos Sólidos
SPECIALTY: Análise de Tensões
SUMMARY:

In structural applications using glass fiber reinforced polymer (GFRP) composites, the double-double (DD) is a new class of non-conventional laminates, characterized by a simplified stacking sequence with two pairs of plies [±Φ/±Ψ]_n. The DD potential to replace conventional quasi-isotropic quadraxial laminates (QUAD) due to its ability to reduce weight, optimize design, simplify manufacturing processes, and lower costs. Although the DD concept has been attracting increasing interest within the scientific community, experimental data remain scarce for different materials and loading conditions, particularly in structural applications such as wind turbine blades. In this context, the present study aims to compare the performance of two equivalent GFRP glass/epoxy laminates: QUAD [±45/(0/90)₃]_s e DD [±15/±75]_4T, through uniaxial compression tests, low-velocity impact (LVI), and compression after impact (CAI) tests at four nominal energy levels (30, 45, 60, and 74 J). The results demonstrate that replacing the quadraxial laminate with the double-double configuration, within the parameters investigated in this study, is feasible while maintaining mechanical performance, thereby highlighting its potential for application in the wind energy industry.

COMMITTEE MEMBERS:
Presidente - 1338331 - RAIMUNDO CARLOS SILVERIO FREIRE JUNIOR
Interno - 1202134 - JOSE DANIEL DINIZ MELO
Externo à Instituição - CARLOS ALBERTO CIMINI JUNIOR - UFMG
Externo à Instituição - LUCAS LISBÔA VIGNOLI - Coppe