Karakteristik Bending Struktur Berlapis dengan Inti Berbentuk Gelombang Trapezoidal Dua Arah

Marsono Marsono, Fery Hidayat, Gregorius P. Purap

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Abstrak

 

Struktur berlapis berbahan komposit FRP banyak dibutuhkan di sektor transportasi, dengan pertimbangan performa yang baik dalam hal bobot yang ringan serta kekuatan yang tinggi. Struktur berlapis juga memiliki kemampuan untuk melindungi penumpang dari luka-luka serius ketika terjadi kecelakaan (tabrakan). Hal ini memberikan alasan mangapa struktur ini sangat dibutuhkan pada sektor transportasi. Penelitian ini diarahkan untuk mendapatkan metoda pembuatan spesimen sturktur berlapis dengan inti berbentuk gelombang trapezoidal yang paling sederhana. Penelitian ini juga bertujuan untuk mendapatkan angka beban maksimum yang dapat ditahan oleh struktur berlapis serta angka kekakuannya melalui uji bending. Bahan yang digunakan untuk membuat struktur berlapis ini adalah bahan komposit serat kaca. Specimen struktur berlapis dibuat dengan dua variasi jenis serat kaca, yaitu WR400 dan WR600 serta variasi ketebalan dinding inti struktur berlapis, yatu 1 lapis dan 2 lapis serat kaca. Pengujian bending yang dilakukan menunjukkan bahwa struktur berlapis dapat menahan beban sampai sebesar 176,05 kg, yang ditunjukkan oleh struktur berlapis yang dibuat dengan 2 lapis bahan serat kaca WR600. Specimen yang sama juga menunjukkan angka kekauan tertinggi, yaitu sebesar 55,6 Kgf/mm.

 

Kata kunci:

Struktur berlapis, inti gelombang, komposit serat kaca, beban maksimum, kekakuan

 

Abstract

 

Sandwich structure made of FRP composite is much need in the transportation sector, because of its good performance, such as lightweight and high strength. Sandwich structure is also has ability to protect passenger from serious injury in the case of accident (crash). This is the reason whay this sandwich structure is needed in the transportation sector.this research is focused to find a simplest method of making a sandwich structure with a trapezoidal corrugated core. This research is also aims to obtain the maximum load that can be bear by the sandwich structure as well as the stiffness value through the bending test. Material that is used to make this sandwich structure is fiberglass compmosite. The specimens were made with two variation of fiberglass woven, which is WR400 and WR600, and variations in thickness of structure core, which is 1 layer and 2 layer of fiberglass. The bending test that have been performed show that the maximum load that can be helad reaches 176.05 kgf, which is showed by the sandwich structure wade with 2 layers of fiberglass WR600. The same specimen also showed the highest stiffness value of 55.6 Kgf/mm.

 

Keywords:

Sandwich structure, corrugated core, fiberglass composite, maksimum load, stiffness


Teks Lengkap:

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Referensi


Chang, Wan-Shu, Edward Venstel, Ted Krauthammer, Joby John (2005), “Bending Behavior of corrugated-core Sandwich Plates”, Composite Structure, Volume 70, Issue 1. August 2005, pp 81-89.

Tumino, Davide, Tommaso Ingrassia, Vicenzo Nigrelli, Giuseppe Pitarresi, Vicednzo Urso Miano (2014), “Mechanical behavior of a sandwich with corrugated GRP core: numerical modeling and experimental validation”, Frattura ed Integrità Strutturale, 30 (2014) pp 317-326; DOI: 10.3221/IGF-ESIS.30.39.

Zaid, Z. M., M.R.M. Rejab and N.A.N Mohamed (2016), “Sandwich Structure Based On Corrugated-Core: A Review”, MATEC Web of Conferences, volume 74, 00029 (2016)

Hou, Shujuan, Shuyun Zhao, Lili Ren, Xu Han, Qing Li (2013), “Crashworthiness Optimization of Corrugated Sandwich Panels”, Material & Design, olume 51, October 2013, pp 1071-1084.

Anonim, ASTM. (2000) ASTM C393-00 –Standard Test Method for Flexural Properties Of Sandwich Constructions.

Mott, Robert L., (2002) “Applied Strength of Materials”, 4th Edition, Prentice-Hall, New jersey.




DOI: https://doi.org/10.26760/JREM.v1i2.89

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