Determination of fracture zone properties in mixed mode I and II

✍ Scribed by Monouchehr Hassanzadeh

• Publisher: Elsevier Science
• Year: 1990
• Tongue: English
• Weight: 78 KB
• Volume: 35
• Category: Article
• ISSN: 0013-7944
• DOI: 10.1016/0013-7944(90)90258-i

✦ Synopsis

Abatraet-Notched beams of saturated concrete were tested, according to RILEM procedure, at temperatures ranging from 20 to -170°C. A model recently proposed by the authors, the Perturbed Ligament Model, was used to obtain size-independent Gr values. Results show that the perturbation lengths are temperature independent, supporting the idea that size dependence of G, as determined by RILEM method is generated by damage during manufacture of specimens rather than during testing. The results show a strong increase in fracture energy with decreasing temperature. The characteristic length &,, also increases, and relative structural brittleness, fsh (20)/I,,(T), experiences a four-fold decrease from room temperature to -170°C.