Characterisation and Modelling of the Non Linear Mechanical Behaviour of SEPCARB® Pr NB41 Carbon/Carbon Composite

In order to model the mechanical behaviour of an austenitic-ferritic duplex stainless steel thanks to "composite" micromechanical non-linear models, its microstructure was analysed and the mechanical behaviour of each phase was characterised. The microstructural morphology of this steel was studied by selective dissolution of the austenitic phase. The microstructure consists of unconnected austenite islands dispersed in a ferritic matrix. Nano-indentation tests were carried out on each phase. These tests allowed to obtain the hardness and the Young modulus of each phase. A non-linear homogenization approach (secant and incremental formulations) was implemented and the results were compared to the monotonous macroscopic tensile tests carried out at constant strain rate. It allowed us to evaluate the relevance of the non-linear homogeneization models for the description of the elasto-plastic behaviour of the studied duplex stainless steel.

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Mechanical behaviour and non-linear analysis of short beams using softened truss and direct strut & tie models

Engineering Structures ◽

10.1016/j.engstruct.2004.12.003 ◽

2005 ◽

Vol 27 (4) ◽

pp. 639-651 ◽

Cited By ~ 15

Author(s):

P.G. Bakir ◽

H.M. Boduroǧlu

Keyword(s):

Mechanical Behaviour ◽

Linear Analysis ◽

Non Linear

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Non-linear analysis of the thermo-electro-mechanical behaviour of shear deformable FGM plates with piezoelectric actuators

International Journal for Numerical Methods in Engineering ◽

10.1002/nme.932 ◽

2004 ◽

Vol 59 (12) ◽

pp. 1605-1632 ◽

Cited By ~ 71

Author(s):

J. Yang ◽

S. Kitipornchai ◽

K. M. Liew

Keyword(s):

Mechanical Behaviour ◽

Piezoelectric Actuators ◽

Linear Analysis ◽

Non Linear ◽

Shear Deformable

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Non-linear delamination in two-dimensional functionally graded multilayered beam

International Journal of Structural Integrity ◽

10.1108/ijsi-12-2017-0079 ◽

2018 ◽

Vol 9 (5) ◽

pp. 646-663

Author(s):

Victor Rizov

Keyword(s):

Mechanical Behaviour ◽

Fracture Behaviour ◽

Strain Energy Release ◽

Functionally Graded ◽

Integral Approach ◽

Two Dimensional ◽

Content Type ◽

Crack Location ◽

Delamination Fracture ◽

Non Linear

Purpose A delamination fracture analysis of two-dimensional functionally graded multilayered end-loaded split beam configuration with non-linear mechanical behaviour of material is conducted. The beam is made of an arbitrary number of longitudinal layers. Perfect adhesion between layers is assumed. The material is two-dimensional functionally graded in the cross-section of each layer. Also, each layer has individual thickness and material properties. A delamination crack is located arbitrary along the beam height. The paper aims to discuss these issues. Design/methodology/approach The delamination fracture behaviour is investigated analytically in terms of the strain energy release rate by analysing the balance of the energy. An additional analysis of the delamination fracture is performed by applying the J-integral approach for verification. Findings The solutions derived are used to evaluate the effects of crack location, material gradients and material non-linearity on the delamination fracture behaviour of end-loaded split beam. The effect of material gradient on the distribution of the J-integral value along the crack front is elucidated too. Originality/value Delamination in the multilayered functionally graded end-loaded split beam exhibiting non-linear mechanical behaviour of the material is analysed assuming that the material property is distributed non-linearly in both thickness and width directions in each layer.

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