Analisa Pengaruh Adhesive Thickness Terhadap Distribusi Tegangan Geser Pada Double Lap Joint Dengan Efek Recessing Menggunakan Metode Elemen Hingga

Maulana, Noval Izza (2021) Analisa Pengaruh Adhesive Thickness Terhadap Distribusi Tegangan Geser Pada Double Lap Joint Dengan Efek Recessing Menggunakan Metode Elemen Hingga. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Dalam dunia industri seperti pada industri automotive, marine, aerospace, penyambungan antara dua material sering dilakukan. Sambungan adalah hasil dari penyatuan beberapa bagian atau konstruksi dengan menggunakan suatu cara tertentu misalnya sambungan konvensional yang masih memiliki kekurangan yaitu terdapat konsentrasi sambungan pada area sambungan yang berdampak pada sifat fisik sambungan. Sambungan dengan menggunakan adhesive memiliki kemampuan untuk mendistribusikan tegangan secara merata, namun masih terdapat konsentrasi tegangan pada ujung-ujung overlap. Untuk mengatasi permasalahan tersebut dapat dilakukan mekanisme pemberian adhesive dengan recessing. Double Lap Joint merupakan sambungan dengan struktur yang seimbang dan sulit terjadi bending. Analisa mengenai recessing diperlukan karena dengan pemberian recess juga dapat mencegah penambahan berat sambungan untuk mencapai tegangan yang lebih merata. Oleh karena itu perlu dilakukan analisa mengenai pengaruhnya terhadap tegangan geser pada adhesive Double Lap Joint.
Pada penelitian ini parameter input yang diberikan adalah berupa tipe overlap yaitu normal dan recessing. Untuk panjang overlap tipe normal yang digunakan 75 mm lalu untuk tipe recessing divariasikan menjadi 12,5 mm, 17,5 mm, 22,5 mm, 27,5 mm, 32,5 mm, 37,5 mm, 42,5 mm, dan 47,5 mm. Ketebalan adhesive pada tipe recessing jika dibandingkan dengan tipe normal menjadi lebih tebal namun tidak merubah volume adhesive sehingga pada tipe normal dan recessing memiliki volume yang sama. Sedangkan parameter output yang dianalisa adalah distribusi tegangan geser yang terjadi sepanjang overlap dan panjang kerusakan pada Double Lap Joint.
Dari penelitian ini didapatkan bahwa variasi panjang recessing berpengaruh terhadap distribusi tegangan geser dan panjang kerusakan yang terjadi. Semakin besar recess maka distribusi tegangan geser semakin merata sedangkan panjang kerusakannya semakin kecil terkecuali pada penambahan ketebalan adhesive lebih dari 100% menyebabkan panjang kerusakan semakin besar. Dengan bertambahnya recess pada simulasi non CZM mengakibatkan tegangan geser maksimum semakin menurun sedangkan pada simulasi CZM tegangan geser maksimum cenderung konstan. Selain itu bertambahnya recess mengakibatkan tegangan geser pada tengah overlap semakin bertambah.
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In the industrial world such as in the automotive, marine, aerospace industries, the connection between two materials is often done. The connection is the result of the union of several parts or construction using a certain method, for example a conventional connection which still has a drawback, namely that there is a concentration of connection in the connection area which has an impact on the physical properties of the connection. The connection using adhesive has the ability to distribute stress evenly, but there is still stress concentration at the ends of the overlap. To overcome these problems, a mechanism for applying adhesive with recessing can be carried out. Double Lap Joint is a connection with a balanced structure and bending is difficult. Analysis of recessing is needed because by giving recess it can also prevent the addition of connection weight to achieve a more even stress. Therefore, it is necessary to analyze its effect on the shear stress on the Double Lap Joint adhesive
In this study, the input parameters given are in the form of overlapping types, namely normal and recessing. For the normal type overlap length used is 75 mm and then for the recessing type it is varied into 12,5 mm, 17,5 mm, 22,5 mm, 27,5 mm, 32,5 mm, 37,5 mm, 42,5 mm, and 47,5 mm. Adhesive thickness on the recessing type when compared to the normal type increases but does not change the adhesive volume so that the normal and recessing types have the same volume. Meanwhile, the output parameters analyzed are the shear stress distribution that occurs along the overlap, and the length of damage to the double lap joint.
From this study it was found that the variation of recessing length affects the distribution of shear stress and the length of the damage that occurs. The larger the recess, the more even distribution of the shear stress, while the smaller the length of the damage, except for the addition of adhesive thickness of more than 100% causing the length of the damage to be greater. With increasing recess in the non-CZM simulation, the maximum shear stress decreases, while in the CZM simulation the maximum shear stress fluctuates slightly. In addition, the increase in recess causes the shear stress in the middle of the overlap to increase.

Item Type:	Thesis (Undergraduate)
Uncontrolled Keywords:	double lap joint, adhesive thickness, tegangan geser, shear stress
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) > TA347 Finite Element Method T Technology > TA Engineering (General). Civil engineering (General) > TA455.A34 Adhesives T Technology > TJ Mechanical engineering and machinery > TJ230 Machine design T Technology > TL Motor vehicles. Aeronautics. Astronautics > TL257.5 Automobiles--Shock absorbers--Design and construction.
Divisions:	Faculty of Industrial Technology and Systems Engineering (INDSYS) > Mechanical Engineering > 21201-(S1) Undergraduate Thesis
Depositing User:	Noval Izza Maulana
Date Deposited:	22 Aug 2021 05:28
Last Modified:	22 Aug 2021 05:28
URI:	http://repository.its.ac.id/id/eprint/88650

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