Failure of Brittle and Quasi-Brittle Materials with Holes Loaded by
Inserted Bolts
Abstract
A study was conducted to understand and predict initial failure
locations, their paths, and failure stresses of specimens with a
circular hole and loaded by a bolt. The polymethyl methacrylate (PMMA)
material was used to make six different types of specimens which had
three different widths with a circular hole of its diameter 8 mm and
different hole locations along the specimen length. All the specimens
were loaded using a bolt inserted into the hole with three different
bolts of nominal diameters of 8 mm, 6 mm, and 5 mm, respectively. To
predict the results obtained from physical tests, the recently proposed
universal failure criterion was used in the study using the finite
element analyses. The maximum normal stresses and its gradients were
considered to predict the failure locations, their directions, and
failure stresses. The predicted failure characteristics were acceptable
when compared to the experimental results.