Banca de QUALIFICAÇÃO: TALITA GALVAO TARGINO

Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
STUDENT : TALITA GALVAO TARGINO
DATE: 08/02/2023
TIME: 14:00
LOCAL: Plataforma de Videoconferência
TITLE:

Mechanical Behavior and Mechanisms of Damage in Carbon/Epoxy Laminates with Traditional Layup and Double-Double Layup under Low Speed Impact

KEY WORDS:

Double-double, Quad, Impact, Mechanical properties, Damage

PAGES: 87
BIG AREA: Engenharias
AREA: Engenharia Aeroespacial
SUBÁREA: Materiais e Processos para Engenharia Aeronáutica e Aeroespacial
SUMMARY:

The improvement and optimization of composite materials is something sought after in several researches; reducing manufacturing time and costs, improving material characteristics and properties, among other things, is extremely important for its use to be even more widespread. Therefore, this work evaluates the possibility of replacing traditional quadriaxial composite laminates (QUAD) by a new layup configuration, called double-double (DD), without losses in its mechanical properties. For this, two carbon fiber/epoxy laminates were developed, both with twelve layers of AS4/8552 prepreg, with equivalent properties and different configurations (stacking sequence): the QUAD [0°3/90°/±45°]S and the DD [±0°/±55°]3T. These materials were submitted to uniaxial compression, low velocity impact tests with energies of 30J, 45J and 74J, and compression after impact (CAI), in order to evaluate the material resistance with and without different types of damage, observing its properties. mechanics and residuals, in addition to their damage mechanisms, mathematically modeling this behavior. The results obtained showed that the two laminates, conventional and double-double, presented similar values, both in the compression behavior of the laminate and in its tolerance to damage. propagation of cracks and delamination, however, the total values obtained for delaminated area are similar for the two laminates for all impact energies studied, this demonstrates that, if the impact behavior is considered, a conventional laminate can be replaced by a laminate DD.

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