Topic
Micromechanics
About: Micromechanics is a research topic. Over the lifetime, 6000 publications have been published within this topic receiving 162635 citations.
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TL;DR: A variational asymptotic micromechanics model has been developed for predicting effective thermoelastic properties of composite materials, and recover the local fields within the unit cell as discussed by the authors.
103 citations
TL;DR: The good agreement between model predictions and the corresponding experiments underlines the potential of micromechanical modeling in improving biomaterial design, through optimization of key parameters such as porosities or geometries of microstructures, in order to reach the desired values for biomaterial stiffness or strength.
Abstract: Hydroxyapatite (HA) biomaterials production has been a major field in biomaterials science and biomechanical engineering. As concerns prediction of their stiffness and strength, we propose to go beyond statistical correlations with porosity or empirical structure-property relationships, as to resolve the material-immanent microstructures governing the overall mechanical behavior. The macroscopic mechanical properties are estimated from the microstructures of the materials and their composition, in a homogenization process based on continuum micromechanics. Thereby, biomaterials are envisioned as porous polycrystals consisting of HA needles and spherical pores. Validation of respective micromechanical models relies on two independent experimental sets: biomaterial-specific macroscopic (homogenized) stiffness and uniaxial (tensile and compressive) strength predicted from biomaterial-specific porosities, on the basis of biomaterial-independent ("universal") elastic and strength properties of HA, are compared with corresponding biomaterial-specific experimentally determined (acoustic and mechanical) stiffness and strength values. The good agreement between model predictions and the corresponding experiments underlines the potential of micromechanical modeling in improving biomaterial design, through optimization of key parameters such as porosities or geometries of microstructures, in order to reach the desired values for biomaterial stiffness or strength.
102 citations
TL;DR: In this paper, a micromechanics-based damage model is proposed for the description of anisotropic damage and the normal opening of microcracks generated by the frictional sliding due to the roughness of crack surface is also considered.
102 citations
TL;DR: In this article, a micromechanically-based constitutive model for high density polyethylene (HDPE) in small deformations is presented, where a semi-crystalline polymer is modeled as an aggregate of randomly oriented composite inclusions, each consisting of a stack of parallel lamellae with their adjacent amorphous layers.
102 citations
TL;DR: In this article, a negative Poisson's ratio is predicted for planar and three-dimensional random isotropic systems when the tangential stiffness is greater than the normal stiffness (i.e. λ > 1 ).
102 citations