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Elastic Follow-Up in the Context of Fracture Assessment

Back to Research Reports Elastic Follow-Up in the Context of Fracture Assessment Review of Process Simulations for Metal Additive Manufacturing Flaw Sizing Techniques Using Guided Waves Flaw Sizing Techniques Using Guided Waves Flaw Sizing Techniques Using Guided Waves Applications, Modelling and Manufacturing Processes for Perforated Composites - Literature Review A Review of High Power, In-Vacuum and Narrow Gap Laser Welding Processes for Thick Section Welding A Review of High Productivity Additive Manufacture Using a Hybrid Laser-Arc Deposition (HLAD) Process A Review of Micro Welding with Fibre and Disc Continuous-Wave Laser Sources A Review of Residual Stress Measurement Techniques Used for Components Produced Using the Selective Laser Melting Process A Review of the Machine GTAW Ambient Temperature Temper Bead Repair Technique for Nuclear Power Plant Components A Review of Weld Repairs of Mar-M247 and Similar Alloys Butt Fusion Welding Procedures and Test Methods Used for PE Pipes Duplex Stainless Steel Welding – A Review of Current Practices In-Bore Multi-Positional Laser Welding In-Process Monitoring of Arc Welding for Quality and Defect Detection Mechanical Fastening Technologies for Steel to Aluminium Joining in Automotive Manufacture Process Capability Study for Friction Stir Spot Welding (FSSW) Resistance Spot Welding with Transition Discs – A Review of Dissimilar Joining Using Transition Materials with Specific Reference to Resistance Spot Welding Surface Modification and Micro-Machining with Pulsed-Laser Sources Wire Fed Electron Beam Additive Manufacture – A State-of-the-Art Review
 

Elastic Follow-Up in the Context of Fracture Assessment

By Guiyi Wu

Background

Residual stress is one of the key factors which could contribute to the failure of an engineering structure. Classification of residual stress into primary or secondary stresses or a mixture of the two depends on the level of elastic follow-up, which is a complex phenomenon. Primary stresses are those stresses arising from loads which contribute to plastic collapse while secondary stresses are those stresses arising from loads which do not contribute to plastic collapse. In the absence of a specific definition of elastic follow-up or an acceptable guidance on determining elastic follow-up, engineers are left with the options of either performing expensive and time-consuming nonlinear finite element analysis or justifying secondary stresses to produce no significant elastic follow-up. Guidance on the nature of residual stresses is required in order to perform engineering critical assessment. Hence, a comprehensive understanding of elastic follow-up is needed to assist the classification of residual stresses.

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