Kinerja Akustik dan Mekanik Panel Sandwich Berbasis Ampas Tebu dan Bambu

Dian Yulia Sari, Aris Minardi, Restu Kristiani, Iwan Yahya, H Harjana

Abstract


Telah dilakukan pengujian kinerja akustik dan kinerja mekanik panel sandwich berbasis ampas tebu dan bambu. Pengujian kinerja akustik dilakukan secara eksperimen mengacu pada prosedur ASTM E-1050-98
dan kinerja mekanik menggunakan material testing machine. Pada penelitian ini dilakukan variasi ketebalan komposit ampas tebu dan pengaruh penambahan lapisan bambu di permukaan atas dan bawah komposit ampas tebu. Hasil penelitian menunjukkan bahwa pengaruh ketebalan sampel adalah menggeser penyerapan bunyi efektif pada frekuensi rendah sedangkan penambahan lapisan bambu pada komposit ampas tebu mempengaruhi penurunan nilai koefisien serapan bunyi yang dikarenakan tingkat kekerasan tinggi dan porositas rendah pada lapisan bambu. Adapun pengaruh ketebalan terhadap kinerja mekaniknya adalah menurunkan nilai MOR dan MOE sementara pengaruh penambahan lapisan bambu membuat nilai MOR naik dan nilai MOE turun. Pengaruh ketebalan dan penambahan lapisan bambu juga mengubah nilai densitas sampel.

Abstract


Sound absorption performance and mechanical performance have been conducted in panel sandwich based bagasse and bamboo. The testing acoustic performance was conducted experimentally refer to ASTM E-1050-
98 standard procedure and mechanical performance using a material testing machine. In this research, thickness variation bagasse composite and bamboo effect of adding a layer on the surface of the upper and lower composite bagasse. The results showed that the influence of the thickness of the sample is to shift the effective sound absorption at low frequencies while adding a layer of bamboo composite bagasse impairment affects the sound absorption coefficient due to a high degree of hardness and low porosity of the lining of bamboo. The effect of thickness on the mechanical performance is to lower the value of MOR and MOE while the effect of adding a layer of bamboo create value MOR MOE values rise and fall. The influence of the layer thickness and the addition of bamboo also change the value of the density of the sample.


Keywords


panel sandwich, composite bagasse, impedance tube, material testing machine, MOR and MOE

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References


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DOI: http://dx.doi.org/10.12962/j24604682.v12i2.1334

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