Dynamic Fracture Toughness Measurement.
Abstract
KId values for PMMA, glass and 'Pitho' tool steel have been measured by a technique based on crack velocity measure-ments. Fracture induced by combined tensile and impact loading can cause a crack to decelerate, pass through a minimum velocity them accelerate again. Crack tip stress in- tensity at the minimum crack velocity is the dynamic fracture toughness for that velocity. Values obtained for PMMA and glass show that KId for slow moving cracks are sig-nificantly smaller than both the corresponding KIc and KId values for fast moving cracks. Reasons for the variation of fracture toughness with crack velocity are discussed. (Author, modified-PL)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1973
- Accession Number
- AD0771146
Entities
People
- B. K. Denton
- J. Congleton
Organizations
- Newcastle University