Nodule influence on fatigue crack growth thresholds in nodular cast iron
2000 (English)In: International Journal of Cast Metals Research, ISSN 1364-0461, Vol. 12, no 5, 319-325 p.Article in journal (Refereed) Published
The influence of microstructure i.e. nodules (voids) on the fatigue threshold value in nodular cast iron is numerically investigated. It is qualitatively shown that the fatigue threshold value is unaffected by the individual nodules and that the threshold value is proportional to the bulk Young's modulus. Furthermore it is shown that nodules (voids) do not influence the crack tip conditions (stress-intensity factor and crack tip opening displacement) if the voids do not lie very close to the tip for physically long cracks. It is concluded that linear elastic fracture mechanics is valid for these types of materials and no influence of the nodules need be taken into count for fatigue calculations when dealing with long cracks.
Place, publisher, year, edition, pages
2000. Vol. 12, no 5, 319-325 p.
fracture mechanics, fatigue, threshold value, nodular cast iron
IdentifiersURN: urn:nbn:se:kth:diva-19741ISI: 000086956500006OAI: oai:DiVA.org:kth-19741DiVA: diva2:338433
QC 201005252010-08-102010-08-10Bibliographically approved