Damage analysis of fiber reinforced Ti-alloy subjected to multi-axial loading—A micromechanical approach

Mahmoodi, Mohammad Javad; Aghdam, M.M.

doi:10.1016/j.msea.2011.07.033

Cited by 40 publications

(32 citation statements)

References 29 publications

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“…The authors used the steady state strain energy release rate available for crack extensions in terms of the constituent properties, the applied stress and the distances to the neighboring cracks. In the past, a single fiber surrounded by matrix material with a fiber volume fraction matching that of the lamina was often used (Berger et al [5], Mahmoodia and Aghdamb [6]). Structured Representative Unit Cells (RUCs) with 2e4 fibers in a hexagonal or square array were investigated by Shoukry et al [7].…”

Section: Introductionmentioning

confidence: 99%

FEM predictions of damage in continous fiber ceramic matrix composites under transverse tension using the crack band method

Meyer

Waas

2016

Acta Materialia

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Section: Introductionmentioning

confidence: 99%

FEM predictions of damage in continous fiber ceramic matrix composites under transverse tension using the crack band method

Meyer

Waas

2016

Acta Materialia

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“…In general, the TRSs are tensile in the metal matrix and compressive in the reinforcements. 34 Hence, the TRSs, which are tensile in Ti, can help the tensile mechanical load that matrix yielding occurs at a lower stress. In other words, the yielding of the MMC initiates at a lower stress with the sum of TRS and mechanical tension.…”

Section: Resultsmentioning

confidence: 99%

Interphase region effect on the biaxial yielding envelope of SiC fiber-reinforced Ti matrix composites

Hassanzadeh-Aghdam

Edalatpanah

Azaripour

2018

Proceedings of the Institution of Mechanical Engineers, Part C:

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The objective of this paper is to investigate the coupled effects of interphase and thermal residual stress on the biaxial initial yield surfaces of metal matrix composites using the simplified unit cell micromechanical model. The representative volume element of the composite consists of three phases, including unidirectional silicon carbide (SiC) fiber, titanium (Ti) matrix, and the interphase region between the fiber and matrix. It is found that the interphase slightly affects the initial yield surfaces of metal matrix composites without thermal residual stress. However, the results reveal that as the thermal residual stress is considered in the micromechanical modeling, the effect of interphase on the response of metal matrix composites becomes much more significant. The effects of the SiC volume fraction, interphase parameters including thickness and material properties on the yielding behavior of the metal matrix composites are examined. To demonstrate the validity of the model, comparisons are carried out between the results of the present model and other micromechanical methods as well as experiment. The extracted results could be useful to guide the modeling and design of a wide range of multiphase metal matrix composites.

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“…One of the main assumptions for deriving the SUC micromechanics model is the perfect bonding condition at the interface between the sub-cells of the RVE. [28][29][30][31] Additionally, it is supposed that the applied normal stress over the RVE does not present any shear stress inside the sub-cells of the RVE. [28][29][30][31] The equilibrium conditions in normal directions between the applied global stresses ( " S l ) (l ¼ x, y or z) over the RVE and local stresses ( ij l ) within each subcell of the RVE are given by…”

Section: Suc Micromechanical Equationsmentioning

confidence: 99%

Coefficients of thermal expansion of carbon nanotube-reinforced polyimide nanocomposites: A micromechanical analysis

Ansari

Hassanzadeh-Aghdam

Darvizeh

2016

Proceedings of the Institution of Mechanical Engineers, Part L:

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In this work, a unit cell-based micromechanical model with a proper representative volume element is proposed to evaluate the coefficients of thermal expansion of carbon nanotube-reinforced polyimide nanocomposites. The model takes an interphase between carbon nanotube and polyimide matrix into account which characterizes the non-bonded van der Waals interaction between two phases. The effects of some important parameters on the coefficients of thermal expansion such as thickness and adhesion exponent of interphase, temperature deviation as well as volume fraction, diameter and waviness of carbon nanotubes are investigated in detail. It is found that the interphase plays a critical role in determining the coefficients of thermal expansion and should be incorporated into the modeling of nanocomposite. According to the obtained results, there exists a specific value for carbon nanotube diameter beyond which further increasing in carbon nanotube diameter does not affect the coefficients of thermal expansion of nanocomposite. Also, the results reveal that the carbon nanotube waviness has a significant influence on the coefficients of thermal expansion of the nanocomposite. The results of the present model are compared with those of finite element method and a very good agreement is pointed out.

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Damage analysis of fiber reinforced Ti-alloy subjected to multi-axial loading—A micromechanical approach

Cited by 40 publications

References 29 publications

FEM predictions of damage in continous fiber ceramic matrix composites under transverse tension using the crack band method

FEM predictions of damage in continous fiber ceramic matrix composites under transverse tension using the crack band method

Interphase region effect on the biaxial yielding envelope of SiC fiber-reinforced Ti matrix composites

Coefficients of thermal expansion of carbon nanotube-reinforced polyimide nanocomposites: A micromechanical analysis

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