Evaluation of interfacial mechanical properties of fiber reinforced composites using the microindentation method

Ho, H.; Drzal, Lawrence T.

doi:10.1016/1359-835x(96)84802-0

Cited by 58 publications

(27 citation statements)

References 16 publications

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“…It should be mentioned that rational parts of the coefficients included in the above equations (29)(30) correspond to the analogous coefficients in the expanded version of equation (26); these coefficients of course have no physical meaning. Moreover, the additional formula for the variance including truncation error can be derived in a similar way but has many times larger expression and so that it is postponed here.…”

Section: Discussionmentioning

confidence: 99%

“…28,29,30,31,32,33) are all positive and increasing in a convex manner together with an increasing α (w) . They are always lower than the input coefficient of variation and increase their magnitude together with an increase of E (w) .…”

Section: Probabilistic Computations Using the Isfemmentioning

confidence: 99%

“…Sensitivity analysis of the homogenized tensor and the FEM error analysis have been carried out and discussed in detail in parallel to the main probabilistic analysis, which can further lead to optimal design of the new composites [27,28]. The largest potential of this work is in application of nonlinear constitutive models [29] of the polymer especially, as well as statistical experimental information on the interfaces [30], which can give the input to further probabilistic studies. The entire study is a next milestone to carry out reliability assessment of various particle-reinforced materials and structures with the use of a homogenization method, without a need of very precise multi-scale meshing of the composite structural elements.…”

Section: Introductionmentioning

confidence: 99%

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Homogenization of carbon/polymer composites with anisotropic distribution of particles and stochastic interface defects

Sokołowski

Kamiński

2018

Acta Mech

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The main objective is to investigate an effect of anisotropic distribution of the reinforcing particles in a cubic representative volume element (RVE) of the carbon-polymer composite including stochastic interphases on its homogenized elastic characteristics. This is done using a probabilistic homogenization technique implemented using a triple approach based on the stochastic perturbation method, Monte Carlo simulation as well as on the semi-analytical approach. On the other hand, the finite element method solution to the uniform deformations of this RVE is carried out in the system ABAQUS. This composite model consists of two neighboring scales-the micro-contact scale relevant to the imperfect interface and the micro-scale-having 27 particles inside a cubic volume of the polymeric matrix. Stochastic interface defects in the form of semi-spheres with Gaussian radius are replaced with the interphase having probabilistically averaged elastic properties, and then such a three-component composite is subjected to computational homogenization on the microscale. The computational experiments described here include FEM error analysis, sensitivity assessment, deterministic results as well as the basic probabilistic moments and coefficients (expectations, deviations, skewness and kurtosis) of all the components of the effective elasticity tensor. They also include quantification of anisotropy of this stiffness tensor using the Zener, Chung-Buessem and the universal anisotropy indexes. A new tensor anisotropy index is proposed that quantifies anisotropy on the basis of all not null tensor coefficients and remains effective also for tensors other than cubic (orthotropic, triclinic and also monoclinic). Some comparison with previous analyses concerning the isotropic case is also included to demonstrate the anisotropy effect as well as the numerical effort to study randomness in composites with anisotropic distribution of reinforcements and inclusions.

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Section: Discussionmentioning

confidence: 99%

Section: Probabilistic Computations Using the Isfemmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Homogenization of carbon/polymer composites with anisotropic distribution of particles and stochastic interface defects

Sokołowski

Kamiński

2018

Acta Mech

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“…57 Microindentation can also be used to measure modulus and hardness at larger length scales using conventional data analyses protocols. 58 Just as remarked earlier, although these methods have shown tremendous promise in providing new insights, the measurements should be treated as qualitative (i.e., comparative) measures because of the large variance often reflected in such measurements.…”

Section: 65mentioning

confidence: 99%

Mechanical Characterization of Mesoscale Interfaces Using Indentation Techniques

Kalidindi

Mohan

Rossi

2016

JOM

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Mesoscale interfaces and interphases play a central role in controlling the many macroscale mechanical properties and performance characteristics of structural materials. Modern instrumented indenters present an unprecedented opportunity to measure, reliably and consistently, the local mechanical responses at a multitude of length scales ranging from tens of nanometers to hundreds of microns. When these high-fidelity measurements are combined with rigorous data analyses protocols, it is possible to systematically study the mechanical role of individual mesoscale interfaces and quantify their contributions to the overall mechanical response of the material system. The advantages of these new measurement and analyses protocols as well as the potential for development and implementation of novel high-throughput assays is discussed.

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“…Ho and Drzal [15] reviewed earlier studies of interphases and pointed out the importance of local stresses on interphase performance. Interphases having appropriate Young's moduli, Poisson's ratios, and thickness were found to be useful for tailoring bulk properties and reducing stress concentration near interfaces [9,11].…”

Section: Introductionmentioning

confidence: 99%

Nanostructured Interphases and Multiscale Effects in the Forming of Composite Micro-Rods

Harik

2003

Int J Mult Comp Eng

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Evaluation of interfacial mechanical properties of fiber reinforced composites using the microindentation method

Cited by 58 publications

References 16 publications

Homogenization of carbon/polymer composites with anisotropic distribution of particles and stochastic interface defects

Homogenization of carbon/polymer composites with anisotropic distribution of particles and stochastic interface defects

Mechanical Characterization of Mesoscale Interfaces Using Indentation Techniques

Nanostructured Interphases and Multiscale Effects in the Forming of Composite Micro-Rods

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