Stress Concentration

A localized region of elevated stress caused by material discontinuities or geometric features (notches, holes, welds). Stress concentrations are initiation points for fatigue cracks and brittle fracture. Defects at stress concentration zones are more critical and may have lower acceptance limits. Weld toe defects like undercut create significant stress concentrations. NDT is particularly important for detecting defects in high-stress regions.

Best Practices

• Always follow applicable NDT standards and procedures
• Use properly calibrated and maintained equipment
• Ensure personnel are properly trained and certified
• Document inspection procedures and results completely
• Keep current with industry standards and best practices