Advanced FEA & integrity

Steel that turns to glass

Ductile-to-brittle transition and fracture assessment

Duration

2:04

Year

2026

The case

The same steel that bends and absorbs 87 J at +20 °C snaps at −20 °C with 7 J. Generic case: a Ø 2.9 m × 25 mm vessel at 25 bar with a 6 × 50 mm crack at the toe of the long seam. Pressure does not change and the crack does not change; as the night cools, toughness drops and the assessment point crosses the failure diagram at −15 °C.

Topics

• Brittle fracture
• Failure assessment diagram
• Pressure vessels

Basis. Generic synthetic case built for this piece. No client data. Not a design verification.