Abstract
This work deals with the numerical simulation on bending test to characterize two Cameroonian hardwoods under mode I and II loading for different crack lengths. The finite element analysis for fracture in orthotropic medium is developed. The algorithm of fracture is introduced in a finite element software Cast3M. According to the Mtheta method, the calculation of the stress intensity factors and the energy release rate for pure mode I and II fracture are deduced using a SENB (Single Edge Notch Bending) specimen. The path independence of Mθ-method on the specimen is confirmed.
Highlights
The wood species Lovoa Trichilioides and Triplochiton Scleroxylon are subject of an increasingly high exploitation and exportation each year in Cameroon and belong to the first five types of hardwoods exploited in the country and used in the various ways [1], [2]
GEOMETRY OF SENB SIMULATION SPECIMEN The geometry of the specimen is firstly generated according to the SENB specimen
There is a great stability with the increase of crown sizes. This satisfied the theoretical assumption of path independence in agreement with work of [19]
Summary
The wood species Lovoa Trichilioides and Triplochiton Scleroxylon are subject of an increasingly high exploitation and exportation each year in Cameroon and belong to the first five types of hardwoods exploited in the country and used in the various ways [1], [2]. Often used in an empirical way, Cameroonian woods are the source of many security and dimension problems, for instance when they are used for the construction of bridges and heavy roof frames In this context, wood material has a special interest to revive construction sector. Fracture behavior of wood is important to be more investigated to better understand the crack process in the structure [3]. In this regard, many work have been done to evaluate the characteristics of fracture and their consequences on wood structure facing crack problems. In this work bending simulation used the M-theta method introduced by [9] - [11] in the plane stress for linear elastic fracture mechanics to model crack growth on two Cameroonian hardwoods
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