Strain gradient elasticity within the symmetric BEM formulation
Journal Title: Frattura ed Integrità Strutturale - Year 2014, Vol 8, Issue 29
Abstract
The symmetric Galerkin Boundary Element Method is used to address a class of strain gradientelastic materials featured by a free energy function of the (classical) strain and of its (first) gradient. With respectto the classical elasticity, additional response variables intervene, such as the normal derivative of thedisplacements on the boundary, and the work-coniugate double tractions. The fundamental solutions - featuringa fourth order partial differential equations (PDEs) system - exhibit singularities which in 2D may be of theorder 1/ r 4 .New techniques are developed, which allow the elimination of most of the latter singularities.The present paper has to be intended as a research communication wherein some results, being elaboratedwithin a more general paper [1], are reported.
Authors and Affiliations
S. Terravecchia, T. Panzeca, C. Polizzotto
Keywords
Related Articles
- EP ID EP147404
- DOI 10.3221/IGF-ESIS.29.07
- Views 66
- Downloads 0
Crack initiation and propagation on the polymeric material ABS (Acrylonitrile Butadiene Styrene), under ultrasonic fatigue testing
Crack initiation and propagation have been investigated on the polymeric material ABS (Acrylonitrile Butadiene Styrene), under ultrasonic fatigue testing. Three controlled actions were implemented in order to...
Inferenza bayesiana per l’analisi dei dati di prove di fatica
Si prende in esame il problema della caratterizzazione a fatica dei materiali mediante campioni di dati poco numerosi. Se ne prospetta una soluzione che impiega la metodologia bayesiana. Per la vasta famiglia degli accia...
Numerical modelling of intergranular fracture in polycrystalline materials and grain size effects
In this paper, the phenomenon of intergranular fracture in polycrystalline materials is investigated using a nonlinear fracture mechanics approach. The nonlocal cohesive zone model (CZM) for finite thickness interfaces r...
Influence of mean stress on the fatigue strength of ASTM A743 CA6NM alloy steel
The objective of this work is to evaluate the effects of mean stress on the fatigue behavior of ASTM A743 CA6NM alloy steel. It is used in several hydrogenator turbine components. In order to achieve it, 33 specimens wer...
A method for calculation of finite fatigue life under multiaxial loading in high-cycle domain
A method for fatigue life assessment in high-cycle domain under multiaxial loading is presented in this paper. This approach allows fatigue assessment under any kind of load history, without limitations. The method...