THERMAL FATIGUE ANALYSIS OF STEEL PLATE

PROJECT SUPERVISORENGR. HAFIZ MUHAMMAD MUZZAMMIL

GROUP MEMBERSKHAWAR RAZA

MUHAMMAD ALI BHALLI ZADA

MUHAMMAD HAMZA BADAR

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CONTENTS

• INTRODUCTION

• AIMS AND OBJECTIVES

• LITERATURE REVIEW

• METHODOLOGY

• THERMAL FATIGUE SETUP

• PROJECT WORK SCHEDULE

• REFERENCES

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INTRODUCTION

• Repeated heating and cooling cause a cyclic stress due to differential thermal

expansion and contraction which termed as thermal fatigue.

• Thermo-mechanical fatigue (short TMF) is the overlay of a cyclical mechanical

loading, that leads to fatigue of a material, with a cyclical thermal loading.

Thermo-mechanical fatigue is an important point that needs to be considered,

when constructing turbine engines or gas turbines.

• Fatigue life is the number of stress cycles of a specified character that a

specimen sustains before failure of a specified nature occurs.

• Low cycle fatigue

• High cycle fatigue

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AIMS AND OBJECTIVES

Design and fabrication of thermal fatigue setup.

Analysis of thermal fatigue life of steel plate.

Investigation of crack initiation, propagation and crack blunt.

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LITERATURE REVIEWAuthor Name Year Parameters Materials Results

IIKKA VIRKKUNEN,Finland

November, 2001 Temperature cycle(20 – 600°C)

Austenitic and Duplex StainlessSteel

After 10 cycles the residual stresses stabilized andthen started to relax due to crack formation.

Siegl J. et al,Czech Republic

November, 2005 Temperature cycle(100-300°C)

Austenitic Stainless Steel

Cracks were visible on free surface of the specimen even after 1000 cycles underloading.

Antoine Fissolo. et al, France

March, 2010 Temperature cycle(20-450°C)

304-L and 315-L Austenitic Stainless Steel

Fatigue life ratio estimated from the Miner’s rule, measured range between 0.2 and 1.2.

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METHODOLOGY

Experimental Setup and analysis:

• Design and fabrication of thermal fatigue setup.

• Analysis of thermal fatigue life of steel plate.

• Investigation of cracks initiation, cracks propagation and crack blunt.

Results Expected

• Temperature curve, Crack behavior and fatigue life of steel plate.

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THERMAL FATIGUE SETUP

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PROJECT WORK SCHEDULEPhase Sep

2016

Oct

2016

Nov

2016

Dec

2016

Jan

2016

Feb

2017

March

2017

April

2017

May

2017

Collection of

relevant

literature data

Experimental

work

Compilation of

results

Analysis of data

Complete report

and other

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REFERENCES

• Virkkunen, Iikka. Thermal fatigue of austenitic and duplex stainless steels.

Acta Polytechnica Scandinavica, Mechanical Engineering Series No. 154, Espoo

2001, 115 pp. Published by the Finnish Academies of Technology.

• Nedbal I., Siegl J., Kunz J.: Relation Between Striation Spacing and Fatigue

Crack Growth Rate in Al-Alloy Sheets in Advances in Fracture Research, Vol. 5,

Proceedings of the 7th international conference on fracture (ICF7), Texas 1989

Eds.K.Salama et al., Vol. 5,Oxford, Pergamon Press 1989, pp. 3483-3491.

• THERMAL FATIGUE OF STAINLESS STEELS ,Bystrianský J.1, Siegl J.2,

Haušid P.2, Strnadel B.31 Institute of Chemical Technology Prague, Faculty of

Chemical Technology, Department of Metals and Corrosion Engineering,

Technická 5, 166 28 Praha 6, 2005

• Thermal fatigue loading for a type 304-L stainless steel used for pressure water

reactor: investigations on the effect of a nearly perfect biaxial loading, and on

the cumulative fatigue life, Antoine Fissoloa, Jean Marc Stelmaszyk, Cedric

gourden, Pauline bouin, Gregory Perez, BP17 92262, 2010 Fontenay aux Roses,

France

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