A Finite Element Analysis (FEA) was performed in support of a failure analysis of the cracks/failure of the flanges, supports, and fillet welds using brick elements. The Finite Element Model (FEM) consisted of nozzles, saddles, tube-sheets, body flanges, tubes, relevant tube side heads, shells, and inlet channels. A thermal stress analysis was performed to determine the state of stresses. The state of stresses was used in determination of the fatigue life of the area of concern.
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- Geometry of the Finite Element Model
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- Temperature Distribution of Heaters
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- Stress Intensity Levels at the Supports
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- Rotation of the Body Flange and Tube-sheet
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- Enlarged view of the Rotation at Body Flange
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- Stress Intensity in the Fillet Weld Connecting the Tube-sheet and Shell
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- Enlarged View of the Fillet Weld Connecting the Tube-sheet and Shell
