Claudio Ruggieri

Calibration of Weibull stress parameters using fracture toughness data

AbstractThe Weibull stress model for cleavage fracture of ferritic steels requires calibration of two micromechanics parameters

Transferability of elastic–plastic fracture toughness using the Weibull stress approach: significance of parameter calibration

(m,\sigma _u )

Numerical evaluation of probabilistic fracture parameters using WSTRESS

. Notched tensile bars, often used for such calibrations at lower-shelf temperatures, do not fracture in the transition region without extensive plasticity and prior ductile tearing. However, deep-notch bend and compact tension specimens tested in the transition region can provide toughness values under essentially small-scale yielding (SSY) conditions to support Weibull stress calibrations. We show analytically, and demonstrate numerically, that a nonuniqueness arises in the calibrated values, i.e., many pairs of

A two-parameter framework to describe effects of constraint loss on cleavage fracture and implications for failure assessments of cracked components

(m,\sigma _u )

Relationship Between J and CTOD in SE(T) and SE(B) Specimens for Stationary and Growing Cracks

provide equally good correlation of critical Weibull stress values with the distribution of measured (SSY) fracture toughness values. This work proposes a new calibration scheme to find