Advanced FEA simulation of GFRP and CFRP responses to low velocity impact: Exploring impactor diameter variations and damage mechanisms
Penulis/Author
Muhammad Luthfi Hakim (1); RAIHAN NAFIANTO (2); Ariyana Dwiputra Nugraha (3); Ardi Wiranata, S.T., M. Eng., Ph.D (4); Eko Supriyanto (5); Prof. Gesang Nugroho, ST., MT., Ph.D. (6); Ir. Muhammad Akhsin Muflikhun, S.T., MSME., Ph.D (7)
Tanggal/Date
2024
Kata Kunci/Keyword
Abstrak/Abstract
In recent decades, the use of composite materials has experienced a significant increase in various fields. Fiber
Reinforced Polymers Composite (FRPC) is one type of composite that is increasingly used due to its versatility
and ability to improve product quality. However, FRPC materials have a high susceptibility to Low Velocity
Impact (LVI) events, which can cause invisible internal damage such as delamination. LVI occurs when FRPC
materials experience a sudden impact with a foreign object at a speed of 1–10 m/s, and can be identified through
drop weight impact tests. This research addresses Finite Element Analysis (FEA) simulations to evaluate the
mechanical properties of materials due to LVI, following the ASTM D7136 drop weight impact test standard. The
variations studied include material types, namely Carbon Fiber Reinforced Polymers (CFRP) and Glass Fiber
Reinforced Polymers (GFRP), as well as variations in the diameter of the impactor. The results showed that GFRP
has more brittle properties than CFRP, which is indicated by the high absorption energy and larger maximum
back surface displacement in CFRP. In addition, the damage in GFRP is more significant as CFRP requires a
higher initiation force and energy to trigger and propagate the damage. The simulations also show that as the
diameter of the impactor increases, the contact force increases, but the impact time is shorter. In contrast, a
smaller diameter impactor penetrates the material more easily, with a smaller impact area and lower impact
energy after contact occurs
