Shear Wave (Transverse Wave)

An ultrasonic wave where particle motion is perpendicular to the direction of wave propagation, also called transverse or S-waves. Shear waves travel slower than longitudinal waves and are used in angle-beam testing for detecting defects oriented perpendicular to surfaces. Shear waves cannot propagate in liquids. They are generated by angled transducers mounted on wedges.

Physical Foundation

Understanding shear wave (transverse wave) is fundamental to effectively applying NDT methods. Many NDT techniques rely directly on these physical principles.

Practical Impact on Inspections

This principle affects equipment selection, test parameters, inspection procedures, and data interpretation. Proper application requires understanding these physics fundamentals.

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