NDLI: Comparison of Heat Input Methods in Welding Residual Stress Analysis

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	David, J. Dewees
Copyright Year	2012
Abstract	Welding residual stress simulation through finite element analysis is becoming increasingly common in fitness-for-service (FFS) assessments of pressurized equipment. The driving force for the residual stress is non-uniform thermal expansion and plastic strain due to drastic temperature gradients; with this in mind, proper heat transfer modeling is essential to meaningful mechanical predictions. The fundamental input to the heat transfer model is the welding arc power, which is commonly represented as an assigned triple Gaussian function (Goldak double ellipsoid model) or more simply, as a uniform temperature. These two methods are compared in detail, and conclusions drawn about the impact of the heat transfer modeling strategy on the predicted weld residual stress for two detailed cases. This evaluation finds particular significance when the welding power, or more particularly the welding energy per unit length, is used in an attempt to characterize a given weld.
Sponsorship	Pressure Vessels and Piping Division
Starting Page	677
Ending Page	686
Page Count	10
File Format	PDF
ISBN	9780791855003
DOI	10.1115/PVP2012-78574
Volume Number	Volume 1: Codes and Standards
Conference Proceedings	ASME 2012 Pressure Vessels and Piping Conference
Language	English
Publisher Date	2012-07-15
Publisher Place	Toronto, Ontario, Canada
Access Restriction	Subscribed
Subject Keyword	Temperature Welding Stress analysis (engineering) Fitness-for-service Gaussian distribution Modeling Stress Temperature gradient Thermal expansion Heat Simulation Finite element analysis Heat transfer
Content Type	Text
Resource Type	Article

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