Laser Pulse Heating of Surfaces and Thermal Stress Analysis (Materials Forming, Machining and Tribology)

This Book Introduces Laser Pulse Heating And Thermal Stress Analysis In Materials Surface. Analytical Temperature Treatments And Stress Developed In The Surface Region Are Also Explored. The Book Will Help The Reader Analyze The Laser Induced Stress In The Irradiated Region And Presents Solutions For The Stress Field. Detailed Thermal Stress Analysis In Different Laser Pulse Heating Situations And Different Boundary Conditions Are Also Presented. Written For Surface Engineers.-- Laser Pulse Heating of Surfaces and Thermal Stress Analysis 4 Preface 6 Acknowledgments 8 Contents 10 1 Introduction 12 2 Equilibrium Laser Pulse Heating and Thermal Stress Analysis 16 2.1 Introduction 16 2.2 Step Input Laser Pulse Heating 17 2.2.1 Stress Free Boundary at the Surface 17 2.2.2 Stress Continuity Boundary at the Surface 30 2.3 Time Exponentially Varying Laser Pulse Heating 37 2.3.1 Stress Free Boundary at the Surface 37 2.3.2 Stress Free Boundary and Convection at the Surface 47 2.3.3 Stress Boundary at the Surface 65 2.4 Entropy Analysis Due to Thermal Stress Field 75 2.5 Findings and Discussions 78 2.5.1 Step Input Pulse Heating 78 2.5.1.1 Stress Free Boundary Condition at the Surface 78 2.5.1.2 Stress Continuity Boundary at the Surface 82 2.5.2 Time Exponentially Varying Laser Pulse Heating 82 2.5.2.1 Stress Free Boundary at the Surface 82 2.5.2.2 Stress Free Boundary and Convection at the Surface 84 2.5.2.3 Stress Boundary at the Surface 89 2.5.3 Entropy Analysis Due to Thermal Stress Field 90 2.5.3.1 Step Input Pulse 90 2.5.3.2 Time Exponentially Decaying Pulse 93 References 95 3 Analytical Solution of Cattaneo and Thermal Stress Equations 96 3.1 Introduction 96 3.2 Surface Heat Source Consideration 97 3.2.1 Step Input Pulse Heating 98 3.2.2 Exponential Pulse Heating 103 3.3 Volumetric Source Consideration 106 3.3.1 Step Input Pulse Heating 107 3.3.2 Exponential Pulse Heating 114 3.4 Entropy Analysis 119 3.5 Findings and Discussion 121 3.5.1 Surface Heat Source Consideration 121 3.5.2 Volumetric Heat Source Consideration 125 3.5.3 Entropy Generation Rate 128 References 130 4 Analytical Treatment of Hyperbolic Equations for Stress Analysis 132 4.1 Introduction 132 4.2 Formulation of Energy Transport in Metallic Substrates at Microscopic Level 133 4.3 Thermal Stress Field: Consideration of Surface and Volumetric Sources 145 4.3.1 Surface Heat Source Consideration 145 4.3.2 Volumetric Heat Source Consideration 151 4.4 Thermal Stress Field: Two-Dimensional Consideration 158 4.5 Findings and Discussions 164 4.5.1 Surface Heat Source Consideration 165 4.5.2 Volumetric Heat Source Consideration 169 4.5.3 Two-Dimensional Analysis 171 References 175 5 Concluding Remarks 178 5.1 Equilibrium Heating 178 5.1.1 Step Input Laser Pulse Intensity 179 5.1.2 Exponential Laser Pulse Intensity 179 5.1.2.1 Stress Free Surface Consideration 180 5.1.2.2 Exponential Stress Distribution at the Surface 180 5.1.2.3 Stress Continuity at the Surface 180 5.1.2.4 Convection Boundary Condition at the Surface 181 5.1.2.5 Entropy Analysis 181 5.2 Cattaneo Heating Model and Thermal Stresses 181 5.2.1 Exponential Laser Pulse Intensity 182 5.2.1.1 Surface Heat Source Consideration 182 5.2.1.2 Volumetric Heat Source Consideration 182 5.2.2 Step Input Laser Pulse Intensity 182 5.2.2.1 Surface Heat Source Consideration 182 5.2.2.2 Volumetric Heat Source Consideration 183 5.2.2.3 Entropy Analysis 183 5.3 Non-Equilibrium Heating 184 5.3.1 Surface Heat Source Consideration 184 5.3.2 Volumetric Heat Source Consideration 185 5.3.3 Two-Dimensional Heating 185 References 185 Index 188 "This book introduces laser pulse heating and thermal stress analysis in materials surface. Analytical temperature treatments and stress developed in the surface region are also explored. The book will help the reader analyze the laser induced stress in the irradiated region and presents solutions for the stress field. Detailed thermal stress analysis in different laser pulse heating situations and different boundary conditions are also presented." -- Font no determinada Front Matter....Pages i-x Introduction....Pages 1-3 Equilibrium Laser Pulse Heating and Thermal Stress Analysis....Pages 5-84 Analytical Solution of Cattaneo and Thermal Stress Equations....Pages 85-119 Analytical Treatment of Hyperbolic Equations for Stress Analysis....Pages 121-165 Concluding Remarks....Pages 167-175 Back Matter....Pages 177-180 Provides practical understanding of the laser surface treatment process, highlights both applications and limitations of laser induced thermal stresses, and provides practical solutions for daily surface treatment problems