Skip to main content
A B C D E F H I K M N O P R S T V W
Fa Fi Fo Fr

Fracture Mechanics Testing

Written by on .

Definition: Fracture mechanics testing comprises standardised materials testing methods for determining the resistance to crack initiation and crack propagation. The values determined include the fracture toughness KIc, the crack tip opening displacement (CTOD) or the J-integral. The procedure is governed, among others, by DIN EN ISO 12135.

Practical relevance: The tests are carried out on notched and pre-cracked specimens under defined loading conditions. Critical stress intensity factors and crack resistance curves (R-curves) are evaluated. Areas of application include pressure equipment, pipelines, welded structures and safety-relevant components. Temperature, specimen geometry and type of loading have a significant influence on the results.

Decision-making perspectives:

  • Technical decision-makers: Selection of suitable materials for crack-critical applications and definition of permissible flaws.
  • Purchasing/project management: Specification of fracture mechanics values in technical delivery conditions.
  • Science: Investigation of crack propagation mechanisms and validation of numerical simulations.
  • Insurance/law: Demonstration of sufficient safety margins in the event of damage or dispute.

Typical testing or verification methods: CT specimen testing, SENB specimens, KIc determination, CTOD test, J-integral evaluation.

FAQ:

  • What does a fracture mechanics test measure?
  • It determines a material’s resistance to crack growth under defined mechanical loading.
Request analysis →