October 2017, Vol. 244, No. 10

Features

Does Residual Stress Really Matter in Pipelines?

The presence of residual stress in components should not be overlooked, even though it may not be as apparent and quantifiable as primary loads. While residual stress is often responsible for over-conservatism of a design, it can also be considered a major “unknown” contributing factor during a failure investigation. The origin of residual stress in engineering components is complex and results from manufacturing, processing, fabrication or assembly. Residual stresses exist within a structure and can be either tensile or compressive. Classification is often made based on origin, type or scale, while the fields can be one-, two- or three-dimensional. Despite the differences in origin, resid

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