Rapid strain energy density evaluation for V-notches under mode I loading conditions. (March 2020)

• Record Type: Journal Article
• Authors: Foti, Pietro; Ayatollahi, Majid R.; Berto, Filippo
• Is Part Of: Engineering failure analysis. Volume 110(2020)
• Publication Date: 2020-03
• Subjects: Strain energy density method -- Finite element analysis -- Control volume -- Correcting formula -- Free coarse mesh; System failures (Engineering) -- Periodicals; Fracture mechanics -- Periodicals; Reliability (Engineering) -- Periodicals; Pannes -- Périodiques; Rupture, Mécanique de la -- Périodiques; Fiabilité -- Périodiques; Fracture mechanics; Reliability (Engineering); System failures (Engineering); Periodicals; Electronic journals; 620.112
• DOI: 10.1016/j.engfailanal.2019.104361
• Languages: English
• ISSNs: 1350-6307

Abstract

Highlights: The use of a correcting formula for SED evaluation with free mesh models is studied. The validity of the formula proposed is proved through numerical analyses. The advantage of this work is the application of the method as a post-processing tool. Abstract: This work investigates the possibility to evaluate the Strain Energy Density value with a free mesh model suggesting the use of a correcting formula a posteriori. Several numerical analyses were carried out to prove the good agreement between the method suggested and the conventional method considered until now to acquire the Strain Energy Density value that requires the construction of the so-called control volume in the pre-processing phase of the FEM code. The main advantage of the methodology shown in the present work to evaluate the Strain Energy Density value is that, accepting an error in the calculation that depends on different parameters, it is possible to apply this method directly as a post-processing tool. This allows also to decrease considerably the effort of the researcher in applying this method and to reduce the calculation time thanks to the use of a free coarse mesh.