Atomic Structure of Steps on 180^o Ferroelectric Domain Walls in PbTiO3
Using the method of anharmonic lattice statics, we calculate the equilibrium structure of steps on 180^o ferroelectric domain
research
What is stress? Some more evidences
What is stress? Is stress a physical quantity?(second section)What is stress? Who has ever seen stress? Is stress a physical quantity?(second section)
Special issue on "Computational and Theoretical Materiomics" now published (J. Computational &Theoretical Nanoscience)
The special issue on "Computational and Theoretical Materiomics: Properties of Biological and de novo Bioinspired Materials" has now been published. A list of papers is included below. A sincere thank you to all contributors! Anyone interested in a reprint of any of the articles please send me a message.
What is stress? Is stress a physical quantity?(second section)
What is stress? Who has ever seen stress? Is stress a physical quantity?(second section) Let us re-consider an example for metal foam as show n Figures 1(a,b) that show the local flexuosity under cycle compression loading. Previous researchers used the effective elastic moduli theory and the effective stress concept to study this kind of problem. However, who know what are the approximate stresses at any point in the form, say, at the points A, B, A’, B’?
InternationInternational Journal of Applied Mechanics (IJAM) Vol.2 No.4
Forthcoming papers of International Journal of Applied Mechanics (IJAM) Vol.2 No.4:
1. “Atomistically-Informed Mesoscale Model Of Deformation And Failure Of Bioinspired Hierarchical Silica Nanocomposites”, Dipanjan Sen, Markus J. Buehler, (Massachusetts Institute Of Technology, USA)
2. “Single Walled Nanotubes As Kirchoff Elasticas”, Prabhat K. Agnihotri And Sumit Basu (Indian Institute Of Technology, India)
InternationInternational Journal of Applied Mechanics (IJAM) Vol.2 No.3
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Published papers of International Journal of Applied Mechanics (IJAM) Vol.2 No.3: 1. “Yield Design Homogenization Method For Compaction Of Monosized Spherical Powders”, Benabbes Anouar, Siad Larbi, Dormieux Luc, Wing Kam Liu, (Universit´E De Reims, France, Northwestern University, USA) |
Capillary effect can be trivial in gecko adhesion
The present study is motivated by two classes of seemingly contradicting experiments on the effect of humidity or the capillary effect on adhesion. While one class of experiments suggests strong effect of humidity in gecko adhesion, those on micromachined surfaces indicate that the adhesion energy remains constant up to a relative humidity of 60–70% even for hydrophilic surfaces. To resolve this apparent paradox, we perform numerical simulations of the vertical peeling of a spatula pad adhered to a rough surface with periodic attachment sites.
On optimal hierarchy of load-bearing biological materials
Load-bearing biological materials such as shell, mineralized tendon and bone exhibit 2-7 levels of structural hierarchy based on constituent materials (biominerals and proteins) of relatively poor mechanical properties. A key question that remains unanswered is what determines the number of hierarchical levels in these materials. Here we develop a quasi-self-similar hierarchical model to show that,
Mechanical properties of unidirectional nanocomposites with non-uniformly/randomly staggered platelet distribution
Unidirectional nanocomposite structures with parallel staggered platelet reinforcements are widely observed in natural biological materials. Our recent paper, published in J. Mech. Phys. Solids, is aimed at an investigation of the stiffness, strength, failure strain and energy storage capacity of a unidirectional nanocomposite with non-uniformly or randomly staggered platelet distribution.