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ITS » Undergraduate Theses » Teknik Material
Posted by yeni at 15/01/2010 08:19:53  •  2331 Views


ANALISA TEGANGAN SISA DAN DISTORSI PADA PENGELASAN FILLET T-JOINT DENGAN METODE ELEMEN HINGGA

ANALYSIS OF RESIDUAL STRESSES AND DISTORTIONS ON T-JOINT FILLET WELDING USING FINITE ELEMENT METHOD

Created by :
Putra, Yudhistira Perdana 



SubjectLas
Alt. Subject Welding
KeywordDistribusi temperatur
tegangan sisa
distorsi
GTAW
metode elemen hingga

Description:

Pengelasan fillet tipe-T banyak digunakan dalam dunia industri perkapalan, struktur jembatan, dan industri Ė industri yang lain. Permasalahan utama proses pengelasan adalah terjadinya tegangan sisa dan distorsi. Tegangan sisa dan distorsi merupakan fenomena yang terjadi pada material, apabila diabaikan dapat mengakibatkan material hasil proses pengelasan tersebut mengalami kegagalan pada saat beroperasi. Proses pengelasan fillet tipe-T dilakukan pada spesimen dengan ukuran panjang fillet, lebar flange, dan tinggi web adalah 500 x 200 x 100 mm. Tebal web adalah 10 mm. Sedangkan tebal flange divariasikan yaitu 10 dan 16 mm. Simulasi dilakukan dengan menggunakan perangkat lunak yaitu ANSYS 8.0 berdasarkan metode elemen hingga model 3 dimensi. Kajian ini dititik beratkan pada perhitungan tegangan sisa dan distorsi. Tegangan sisa dihitung berdasarkan iterasi regangan yang timbul akibat distribusi temperatur selama pendinginan dari temperatur pengelasan menuju temperatur ruang. Dari hasil permodelan dan simulasi diketahui bahwa distribusi tegangan menunjukkan distribusi tegangan terbesar terjadi pada daerah weld metal. Dari hasil analisa didapatkan bahwa dengan meningkatnya tebal pelat (flange) maka tegangan yang terjadi juga meningkat akan tetapi distorsi yang terjadi menjadi lebih kecil. Tegangan sisa longitudinal pada lasan cenderung lebih besar dibandingkan dengan tegangan sisa transversal.


Alt. Description

T-joint fillet welding is used widely in ship building industry, bridge structures, etc. Main problem in welding process is appearing of residual stresses and distortions. Residual stress and distortion are phenomena in material while welding processing. If it is neglected, it will cause failure in its operation. T-joint fillet welding process is done in specimen with dimension of fillet length, flangeís width, and webís height are 500 x 200 x100 mm. And web thicness is 10 mm. Whereas flange thickness is variated in 10 and 16 mm. This simullation using ANSYS 8.0 based on finite element method with 3-D modelling. This modelling is subjected in calculation of residual stresses and distortions. Residual stressís calculated based on its temperature distribution during cooling process from welding temperature to room temperature. From the result of modelling and simulation, it is known that stress distribution shows the maximum stress distribution occur in weld metal zone. From the analysis result, itís found that increasing flange thickness will increase stress but distortion will decrease. The longitudinal residual stress in welding product is bigger than transversal residual stress.

Contributor:
  1. DR. Sungging Pintowantoro, ST, MT
Date Create:15/01/2010
Type:Text
Format:Pdf.
Language:Indonesian
Identifier:ITS-Undergraduate-3100008030835
Collection ID:3100008030835
Call Number:RSMt 671.52 Put a


Source :
Undergraduate Theses, Material Engineering, RSMt 671.52 Put a, 2007

Coverage :
ITS Community Only

Rights :
Copyright @2007 by ITS Library. This publication is protected by copyright and permission should be obtained from the ITS Library prior to any prohibited reproduction, storage in a retrievel system, or transmission in any form or by any means, electronic, mechanical, photocopying, recording, or likewise. For information regarding permission(s), write to ITS Library


Publication URL :
http://digilib.its.ac.id/analisa-tegangan-sisa-dan-distorsi-pada-pengelasan-fillet-tjoint-dengan-metode-elemen-hingga-7858.html




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Distribusi , Distribusi temperatur , GTAW , distorsi , elemen , hingga , metode , metode elemen hingga , sisa , tegangan , tegangan sisa , temperatur



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