Harenilina Yuningputri. THE EFFECT OF THICKNESS VARIATION
HONEYCOMB CORE CORRUGATED B-FLUTE TYPE DUE TO
BENDING STRESS CHARACTERISTICS OF COMPOSITE SANDWICH
FIBER CANTULA. Thesis. Faculty of Teacher Training and Education Sebelas
Maret University. Surakarta. October 2013
The purpose of this research was to determine the Bending stress of
composite sandwich cantula fiber by using variation honeycomb core corrugated
B-flute type with the different thickness.
This research was done by flexural tests on sandwich composite specimen
with reference to ASTM C 393. The face in this study using cantula fiber,
Polyester resin Unsaturatd Yukalac ® 157 BQTN-EX, and metyl etyl ketone
peroxide catalyst (MEKPO). The core is made of cardboard B-flute type and
compiled using PV Ac-Fox. Epoxy adhesive is used Versamid 140. Hand lay-up
method is used to create a composite cantula with weight fraction 40%. Test
specimen is done by varying the core with a thickness of 10 mm, 20 mm, 30 mm,
and 40 mm. sandwich composite test specimens were tested using machine
Universal Testing Machine (UTM).
The data and the results showed core thickness variations affect Bending
stress, core shear stress, and the facing Bending stress. The addition of core
thickness causes a decrease in Bending stress, core shear stress, and facing
Bending stress. value is 14.53 MPa, core shear strength value is 0.64 MPa, and the
value of facing Bending stress is 14.35 MPa.
Keywords : Sandwich Composite, Bending Stress, Corrugated Cardboard B-
Flute Type, Cantula Fiber
Harenilina Yuningputri. PENGARUH VARIASI KETEBALAN CORE
HONEYCOMB KARDUS TIPE B-FLUTE TERHADAP KARAKTERISTIK
BENDING KOMPOSIT SANDWICH SERAT CANTULA. Skripsi, Fakultas
Keguruan dan Ilmu Pendidikan Universitas Sebelas Maret. Surakarta. Oktober
2013
Tujuan penelitian ini adalah untuk mengetahui kekuatan bending komposit
sandwich serat cantula dengan menggunakan variasi core honeycomb kardus tipe
B-flute yang memliki ketebalan berbeda.
Penelitian ini dilakukan dengan melakukan pengujian bending pada
spesimen komposit sandwich dengan mengacu pada standar ASTM C 393. Face
dalam penelitian ini menggunakan serat cantula, resin Unsaturated Polyester
Yukalac® 157 BQTN-EX, dan katalis metyl etyl keton peroksida (MEKPO). Core
dibuat dari kardus tipe B-flute dan disusun menggunakan PV Ac-Fox. Adhesive
yang dipakai yaitu epoxy Versamid 140. Metode hand lay up dipakai untuk
membuat komposit cantula dengan fraksi berat 40%. Spesimen uji dilakukan
dengan melakukan variasi ketebalan core 10 mm, 20 mm, 30 mm, dan 40 mm.
Spesimen uji komposit sandwich diuji dengan menggunakan Universal Testing
Machine (UTM).
Data dan hasil penelitian menunjukkan variasi ketebalan core
mempengaruhi tegangan bending, tegangan geser core, dan tegangan bending
face. Penambahan ketebalan core mengakibatkan penurunan tegangan bending,
tegangan geser core, dan tegangan bending face. Nilai tertinggi didapatkan pada
ketebalan core 10 mm dengan tegangan bending sebesar 14,53 MPa, nilai
tegangan geser core sebesar 0,64 MPa, dan nilai tegangan bending face sebesar
14,35 MPa.
Kata Kunci: Komposit Sandwich, Tegangan Bending, Kardus Tipe B-Flute, Serat
Cantul
