A theoretical method is considered for the theoretical plotting of the fatigue curves for specimens with stress concentration using the results of tests for smooth samples. The method is based on the results of a large number of experimental data for each material (from 100 to 200 specimens for each level of stress concentration). The computed and experimental data proved to be in reasonable agreement.
The paper describes an efficient procedure, based on standard finite element techniques, for the failure analysis of bonded structures. Modelled with structural elements, the adherends are attached by means of standard kinematic constraints to a single layer of solid elements reproducing the adhe...
For the development of constitutive equations that describe the behaviour of materials under cyclic plastic strains, different kinds of formulations can be adopted. Recently, an energy-based fatigue damage parameter has been developed to present energy-fatigue life curves using a calculation of t...
submitted by jrtebarceajr 1 year and 10 months ago
An effective and efficient methodology for the fatigue cracks growth evaluation in human cortical bone is presented. The solution is based on the elastic linear fracture mechanics. For the evaluation of cracked boundary the dual boundary element method is used. The solution is based on the develo...
On the basis of the structural-temporal approach, we explain the rapid increase in the spall strength and its stabilization in the nanosecond range of load duration, observed in several experiments. We give a detailed presentation of the method for describing the time-dependence of the spall stre...
The paper considers a computational model, based on the consideration of the hardening/softening level in local volumes, to assess the high-cycle fatigue life of materials. This approach could be considered as a modified Orowan-Afanasiev model. A method to determine the model parameters from fati...
In nondestructive testing, the use of ultrasonic elastic waves has proven as one of the most successful techniques to detect structural damage such as cracks or delaminations. Especially, Structural Health Monitoring (SHM) is characterized by permanently installed actuators and sensors. As the ca...
The development of simulation methods for calculating notch root parameters for purposes of estimating the fatigue life of notched components is a critical aspect of designing against fatigue failures. At present, however, treatment of the notch root stress and plastic strain field gradients, cou...
Fatigue life reliability often is accounted for through minimal material data. To provide this information within structural calculation, experimental data from specimen testing needs to be processed with statistical methods. The results are either mean or worst case material data. However, in a ...
A procedure for estimation of probabilistic fatigue S-N curves for notched structural components is described. Plain material strain-life data is used to identify a statistical Weibull strain-life model and, using an adequate elastoplastic analysis, material strain-life probabilistic curves are c...
