Effect of fibre arrangement on the multiaxial fatigue of fibrous composites: a micromechanical computational model
Clicks: 270
ID: 67314
2015
Structural components made of fibre-reinforced materials are frequently used in engineering
applications. Fibre-reinforced composites are multiphase materials, and complex mechanical phenomena take
place at limit conditions but also during normal service situations, especially under fatigue loading, causing a
progressive deterioration and damage. Under repeated loading, the degradation mainly occurs in the matrix
material and at the fibre-matrix interface, and such a degradation has to be quantified for design structural
assessment purposes. To this end, damage mechanics and fracture mechanics theories can be suitably applied
to examine such a problem. Damage concepts can be applied to the matrix mechanical characteristics and, by
adopting a 3-D mixed mode fracture description of the fibre-matrix detachment, fatigue fracture mechanics
concepts can be used to determine the progressive fibre debonding responsible for the loss of load bearing
capacity of the reinforcing phase.
In the present paper, a micromechanical model is used to evaluate the unixial or multiaxial fatigue behaviour of
structures with equi-oriented or randomly distributed fibres. The spatial fibre arrangement is taken into account
through a statistical description of their orientation angles for which a Gaussian-like distribution is assumed,
whereas the mechanical effect of the fibres on the composite is accounted for by a homogenization approach
aimed at obtaining the macroscopic elastic constants of the material. The composite material behaves as an
isotropic one for randomly distributed fibres, while it is transversally isotropic for unidirectional fibres. The
fibre arrangement in the structural component influences the fatigue life with respect to the biaxiality ratio for
multiaxial constant amplitude fatigue loading. One representative parametric example is discussed.
| Reference Key |
brighenti2015effectfrattura
Use this key to autocite in the manuscript while using
SciMatic Manuscript Manager or Thesis Manager
|
|---|---|
| Authors | Brighenti, Roberto;Carpinteri, Andrea;Scorza, Daniela; |
| Journal | frattura ed integrità strutturale |
| Year | 2015 |
| DOI | DOI not found |
| URL | |
| Keywords |
Materials of engineering and construction. Mechanics of materials
Engineering (General). Civil engineering (General)
Biotechnology
Technology
Archaeology
Mechanical engineering and machinery
chemical engineering
social sciences
computer engineering. computer hardware
mechanics of engineering. applied mechanics
structural engineering (general)
engineering design
|
Citations
No citations found. To add a citation, contact the admin at info@scimatic.org
Comments
No comments yet. Be the first to comment on this article.