Anjasmara, Haikal (2021) PENGARUH KERUSAKAN DEBONDING TERHADAP RESPON DINAMIS SECARA STEADY STATE DAN TRANSIENT PADA STERN RAMP DOOR KAPAL PENUMPANG 6311 GT DENGAN METODE ELEMEN HINGGA. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Sandwich sebagai material maju meningkatkan inovasi pada bidang konstruksi kapal. Salah satu pengaplikasiannya pada struktur ramp door. Karakteristik material sandwich yang ringan dan kuat menjadi alasan utama pengaplikasian material ini. Akan tetapi, material sandwich juga memiliki kekurangan salah satunya yaitu kerusakan debonding dimana ikatan antara face dan core terlepas. Kerusakan ini dapat mempengaruhi kekakuan struktur yang berdampak pada berkurangnya kekuatan struktur pada ramp door. Pengaruh debonding diidentifikasi dengan melakukan pengujian numerik menggunakan software elemen hingga. Pengujian ini bertujuan untuk mengidentifikasi respon dinamis yang terjadi pada ramp door akibat pengaruh dari kerusakan debonding yang terjadi. Penelitian ini menggunakan software elemen hingga dengan 2 metode yaitu modal analysis untuk mengetahui frekuensi natural dan dynamics explicit untuk mengetahui respon dinamis tegangan dan displasemen akibat pembebanan pada ramp door. Berdasarkan hasil pengujian dengan software elemen hingga menunjukkan bahwa kerusakan debonding menurunkan frekuensi natural struktur yang mengindikasikan kekakuan struktur berkurang. Semakin besar rasio debonding dalam suatu struktur maka penurunan frekuensi naturalnya juga akan semakin besar. Bentuk kerusakan debonding yang paling sensitif merupakan bentuk kerusakan persegi. Lokasi kerusakan paling sensitif berada pada posisi kanan dan kiri dari model. Dari hasil penelitian diketahui bahwa rasio kerusakan debonding mengakibatkan amplitudo dari respon dinamis meningkat apabila dikenai pembebanan secara periodik ataupun secara transient. ==================================================================================================
Sandwich as an advanced material increases innovation in the field of ship construction. One of the applications was on the ramp door structure. The characteristics of sandwich material which were light and strong were the main reasons for the application of this material. However, sandwich material also has drawbacks, one of which was debonding damage where the bond between the face and core was separated. This damage can affect the stiffness of the structure which has an impact on reducing the strength of the structure on the ramp door. The effect of debonding was identified by performing numerical tests using finite element software. This test aimed to identify the dynamic response that occurs in the ramp door due to the influence of the debonding damage that occurs. This study used finite element software with 2 methods, namely modal analysis to determine the natural frequency and explicit dynamics to determine the dynamic response of stress and displacement due to loading on the ramp door. Based on the test results with finite element software, it showed that debonding damage reduced the natural frequency of the structure which indicated reduced structural stiffness. The greater the debonding ratio in a structure, the lower the natural frequency would be. The most sensitive form of debonding damage was the square form of damage. The most sensitive fault location were on the right and left of the model. From the research results, it was known that the ratio of debonding damage caused the amplitude of the dynamic response to increase when subjected to periodic or transient loading.
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Uncontrolled Keywords: | debonding, sandwich, frekuensi natural, dynamic explicit, respon dinamis, debonding, sandwich, natural frequency, dynamic explicit, dynamic response. |
| Subjects: | T Technology > T Technology (General) > T57.62 Simulation T Technology > T Technology (General) > T57.83 Dynamic programming |
| Divisions: | Faculty of Marine Technology (MARTECH) > Naval Architecture and Shipbuilding Engineering > 36201-(S1) Undergraduate Thesis |
| Depositing User: | Haikal Anjasmara |
| Date Deposited: | 01 Sep 2021 14:49 |
| Last Modified: | 01 Sep 2021 14:49 |
| URI: | http://repository.its.ac.id/id/eprint/91451 |
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