Unifying Environmental Stress Cracking and Mechano-Sorptive Creep Under the Umbrella of Mechano-Sorptive Phenomena Yue Yan, Anil Misra, Paulette Spencer, Viraj Singh, Ranganathan Parthasarathy Biomimetics, 2026 Mechano-sorptive phenomena (MSP) refer to the coupled mechanical response of polymers under simultaneous mechanical stress and fluid sorption. The most researched MSP are environmental stress cracking (ESC) and mechano-sorptive creep (MSC). ESC initiates at regions of localized stress and solvent sorption, presenting as brittle fracture, while MSC is characterized by large, time-dependent, and partially recoverable creep associated with transient bulk sorption. ESC experiments can however also result in significant plastic deformation, in which case the term environmental stress yielding (ESY) has been used. Similarly, MSC can evolve into tertiary creep followed by rupture, in which case the phenomenon is termed mechano-sorptive creep rupture (MSCR). Both behaviors originate from solvent diffusion into the amorphous phase, leading to disruption of non-covalent interactions between polymer chains. This review bridges seemingly disconnected research to illustrate that ESC and MSC represent extremes on a continuum of MSP, rather than disparate phenomena. We identify the principles of polymer thermodynamics and experimental methods necessary to separate polymer deformation under MSC into reversible stress-induced swelling and irreversible non-equilibrium deformation. Finally, we illustrate how MSP underline the functionality of several biomimetic materials including dentin adhesives, mutable collagenous tissue, spider silk, tendons, and articular cartilage, as well the synthesis of biomimetic materials by solvent vapor annealing assisted by soft shear.
Revised identification of strain gradient elastic parameters Luca Placidi, Anil Misra, Gabriele La Valle, Casey Rodriguez ZAMM Zeitschrift Fur Angewandte Mathematik Und Mechanik, 2026 The work reported in “Granular micromechanics‐based identification of isotropic strain gradient parameters for elastic geometrically nonlinear deformations” misidentified key terms in the grain‐pair objective relative displacement when accounting for the second gradient of placement. In this paper, we correct that oversight by deriving a revised expression for the grain‐pair objective relative displacement within the granular micromechanics framework. The amended terms, which resemble Christoffel symbols expressed in terms of strain gradients, modify the contributions of both the normal and tangential components to the strain energy and, consequently, alter the identified strain‐gradient elastic parameters. Importantly, the identification of the standard (first gradient) elastic tensor remains unchanged. This brief paper presents the corrected derivation, the resulting stiffness tensors for anisotropic strain‐gradient elasticity, and updated analytical expressions for the material parameters in both 2D and 3D isotropic settings.
A nonlinear micropolar continuum model with diffusion–reaction equation for remodeling of bone with trabecular lattice microarchitecture Gabriele La Valle, Christian Soize, Anil Misra, Ivan Giorgio Mathematics and Mechanics of Solids, 2026 We present a nonlinear micropolar continuum model that includes a diffusion–reaction equation for the remodeling of bone with a trabecular lattice microstructure. This micropolar formulation enables the modeling of bone’s adaptive response to mechanical stimuli. The remodeling process is described as a time evolution regulated by a feedback mechanism that adjusts both the orientation of the trabecular lattice microarchitecture, thanks to the micropolar formulation, and the mechanical properties, related to key morphological features such us bone density. The junctions between trabeculae are modeled as nodal points within the micropolar framework, incorporating the following energy densities: mechanical deformation, mechano-biologic contributions, and Rayleigh-type dissipation terms that control the time evolution of remodeling. We present the weak form of the energetic formulation, which includes the diffusion–reaction equation. The cases of isotropic and orthotropic material symmetries class are deduced from the general formulation. This weak formulation is adapted to the development of a computational model based on the use of the finite element method. At the end of this paper, we discuss aspects related to validation, model complexity, and possible clinical applicability.
Structural Phase Transformation in a Simplex Tensegrity Earth and Space 2024 Engineering for Extreme Environments Proceedings of the 19th Biennial International Conference on Engineering Science Construction and Operations in Challenging Environments, 2024
Material-tissue interfacial phenomena: Contributions from dental and craniofacial reconstructions Material Tissue Interfacial Phenomena Contributions from Dental and Craniofacial Reconstructions, 2016
Behaviour of reinforced polyurethane resin micropiles: Experimental measurements and analytical modeling Geotechnical Engineering for Infrastructure and Development Proceedings of the Xvi European Conference on Soil Mechanics and Geotechnical Engineering Ecsmge 2015, 2015
Dentin/adhesive interface in teeth Paulette Spencer, Qiang Ye, Jonggu Park, Ranganathan Parthasarathy, Orestes Marangos, et al. Structural Interfaces and Attachments in Biology, 2013
Macro- and meso-analyses of rock joint direct shear test using particle flow theory Yanshilixue Yu Gongcheng Xuebao Chinese Journal of Rock Mechanics and Engineering, 2012
Research on construction method of stochastic joints 3D-network model of equivalent rock mass Yanshilixue Yu Gongcheng Xuebao Chinese Journal of Rock Mechanics and Engineering, 2012
Research on application of coupling technique of adaptive continuum/discontinuum periodic boundary cell to equivalent rock mass Yanshilixue Yu Gongcheng Xuebao Chinese Journal of Rock Mechanics and Engineering, 2012
Higher-order stress-strain theory for damage modeling implemented in an element-free galerkin formulation CMES Computer Modeling in Engineering and Sciences, 2010
Micromechanics based stress-displacement relationships of rough contacts: Numerical implementation under combined normal and shear loading CMES Computer Modeling in Engineering and Sciences, 2009
Micromechanical property quantification using scanning acoustic microscopy Proceedings of the 2006 Sem Annual Conference and Exposition on Experimental and Applied Mechanics 2006, 2006
Micromechanics model for cohesive materials Anil Misra, Ganesh Thiagarajan Numerical Models in Geomechanics 9th Proceedings of the International Symposium on Numerical Models in Geomechanics NUMOG 2004, 2004
Multi-asperity contact model for wave propagation through rock joint Numerical Models in Geomechanics 9th Proceedings of the International Symposium on Numerical Models in Geomechanics NUMOG 2004, 2004
Force-deformation relationships for rough interfaces Proceedings of Engineering Mechanics, 1995
Effect of particle potentials and elasticity upon the behavior of ultra-fine particulate materials American Society of Mechanical Engineers Applied Mechanics Division AMD, 1995
Relationship of porosity and elastic properties for consolidated granular aggregates American Society of Mechanical Engineers Materials Division Publication MD, 1992
