Anggara, Reza Tri (2014) Analisa Tegangan Sisa Pada daerah Hasil Cold Expansion Hole Dengan Pemberian Beban Single Overload. Sarjana thesis, Universitas Brawijaya.
Abstract
Pembebanan berulang pada suatu struktur seringkali terjadi secara fluktuatif, seperti halnya mengalami pembebanan berlebih (overload) yang dapat menyebabkan terjadinya retak. Salah satu solusi untuk menghambat terjadinya retak adalah teknik Cold Expansion Hole. Untuk itu diperlukan suatu observasi berupa analisa tegangan karena setelah mengalami pembebanan berlebih (overload), sangat perlu diketahui jenis dan besarnya tegangan sisa yang terjadi. Penelitian ini dilakukan dengan dasar konsep Metode Elemen Hingga secara simulasi. Pemodelan pada simulasi ini berupa spesimen tanpa Cold Expansion Hole dan spesimen dengan Cold Expansion Hole, setelah itu diberikan pembebanan single overload sebesar 60kN pada masing-masing spesimen. Untuk memvalidasi pemodelan penelitian ini, dilakukan komparasi hasil grafik distribusi tegangan sisa dengan penelitian V. Nigrelli dan Pasta. Hasil penelitian menunjukkan bahwa pemberian beban single overload sebesar 60 kN pada spesimen tanpa Cold Expansion Hole memperbesar tegangan sisa tarik 183.17 MPa sedangkan pada spesimen dengan Cold Expansion Hole sebesar 233 MPa (meningkat 78 %). Pada siklus setelah overload, spesimen tanpa Cold Expansion Hole menghasilkan tegangan sisa tarik sebesar 122 MPa sedangkan pada spesimen dengan Cold Expansion Hole tegangan sisa tarik sebesar 89.43 MPa (menurun 73 %).
English Abstract
Cyclic loading on a structure often occurs on a fluctuating, as does having excess loading (overload) which can lead to the occurrence of cracks. One solution to inhibit the onset of crack is a Cold Hole Expansion Technique. For that required an observation such an analysis of stress because after getting excess loading (overload), it is very important to knowing the type and magnitude of the residual stress which occurs. This research was conducted as a simulation on the basic concept of the Finite Element Methode. This form of simulation modeling of the specimens without Cold Expansion Hole and specimens with Cold Expansion Hole, once it is given the loading of single overload of 60kN on each specimen. To validate the modelling of the research, performed comparisons of stress distribution graph of results with V. Nigrelli and Pasta research. The results showed that the giving of a single overload of 60 kN in the specimens without Cold Expansion Hole tensile residual stresses enlarge 183.17 MPa while in specimens with Cold Expansion Hole of 228 MPa (increased 78%). In the cycle after the overload, the specimen without Cold Expansion Hole produces a stress drop remains of 120 MPa while in specimens with Cold Expansion Hole tensile residual stresses of 89.43 MPa (decreased 73%).
| Item Type: | Thesis (Sarjana) |
|---|---|
| Identification Number: | SKR/FT/2013/537/051400157 |
| Subjects: | 600 Technology (Applied sciences) > 621 Applied physics |
| Divisions: | Fakultas Teknik > Teknik Mesin |
| Depositing User: | Hasbi |
| Date Deposited: | 20 Jan 2014 09:41 |
| Last Modified: | 10 Nov 2021 06:25 |
| URI: | http://repository.ub.ac.id/id/eprint/142269 |
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