Banca de DEFESA: SOFIA DEHAINI GARCIA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : SOFIA DEHAINI GARCIA
DATE: 21/11/2025
TIME: 08:30
LOCAL: Google meet (meet.google.com/ncs-oqbf-rst)
TITLE:

Pyramidal bamboo truss structure composed of nodes obtained by additive manufacturing and biobased adhesive.

KEY WORDS:

Spatial trusses, Mechanical properties, Sustainability and Addictive Manufacturing.

PAGES: 126
BIG AREA: Engenharias
AREA: Engenharia Mecânica
SUBÁREA: Mecânica dos Sólidos
SPECIALTY: Mecânica dos Corpos Sólidos, Elásticos e Plásticos
SUMMARY:

The primary objective of this work — to develop and characterise pyramidal truss structures
using bamboo struts and 3D-printed nodes — was fully achieved, successfully balancing
sustainability, low weight, and adequate mechanical performance for engineering applications.
The study validated the potential of bamboo as a structural element, which demonstrated high
tensile strength (≈126 MPa), ductile behaviour (≈2.55% strain), and competitive compressive
properties. The feasibility of the bamboo-to-node interface using PLA was established, with the
castor oil resin adhesive proving satisfactory and crucial for structural integrity, achieving an
average pull-out force of ≈115 N. The comparative analysis between the structures with short
struts (P30) and long struts (P40) revealed a clear trade-off between mechanical and physical
properties. The P30 structures consistently showed the best overall mechanical performance,
with higher strength and toughness (≈7 kJ/m3 ) in the unit cells, and the TR-P30 beams
sustained the highest maximum flexural load (≈122 N). Conversely, the P40 structures excelled
in mass optimisation, achieving the lowest equivalent density (0.045 g/cm3 in the beam),
representing a mass reduction of approximately 43%, in addition to exhibiting more stable post-
peak behaviour. In summary, the work validates the concept of hybrid bamboo/additive
manufacturing trusses, highlighted by their ability to combine low weight with competitive
mechanical performance. The results demonstrate that this architecture is a promising
alternative for light and sustainable engineering, with potential applications in sandwich panels
and space frames.

BANKING MEMBERS:
Presidente - 1691537 - TULIO HALLAK PANZERA
Externo ao Programa - 3469890 - HULISSES BONETI MARCON
Externo à Instituição - Rodrigo José da Silva
Externo à Instituição - JULIO CESAR DOS SANTOS