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MNasr's picture

Novel silicon nanowire-based 3-dimensional devices and systems

A new approach for monolithic integration of silicon nanowires with 3-dimensional devices (for more details of the project see:https://www.researchgate.net/project/Novel-silicon-nanowire-based-3-dime...). Integration of silicon nanowires in three-dimensional devices including integrated circuits (ICs) and microelectromechanical systems (MEMS) leads to enhanced functionality and performance in diverse applications.

Jingjie Yeo's picture

Materials-by-design: computation, synthesis, and characterization from atoms to structures

https://doi.org/10.1088/1402-4896/aab4e2 In the 50 years that succeeded Richard Feynman’s exposition of the idea that there is "plenty of room at the bottom" for manipulating individual atoms for the synthesis and manufacturing processing of materials, the materials-by-design paradigm is being developed gradually through synergistic integration of experimental material synthesis and characterization with predictive computational modeling and optimization.

Biomechanical Testing

Biomechanics & Biomechanical Testing

Full blog post can be found here

Key concepts for medical device design include biomechanics, biocompatibility, and biofunctionality. This post will go over the mechanics of an exemplar biological tissue, the bone, and mechanical testing of biomaterials that are used in developing medical devices and equipment.

Qiming Wang's picture

Magnetoactive Acoustic Metamaterials

Kunhao Yu, Nicholas X. Fang, Guoliang Huang, Qiming Wang, Magnetoactive Acoustic Metamaterials, Advanced Materials, 1706348, 2018.

Jingjie Yeo's picture

Effects of oscillating pressure on desalination performance of transverse flow CNT membrane

https://doi.org/10.1016/j.desal.2018.03.029 In parallel with recent developments in carbon nanomaterials, there is growing interest in using these nanomaterials for desalination. To date, many studies have affirmed the potential of using such nanomaterials for constant pressure desalination operation. In this work, the performance of such membrane when subjected to oscillatory pressure at sub-nanosecond is investigated in detail.

GTN model

I have 2 questions regarding GTN model.

1) What does q1, q2, q3 signify in GTN damage model? What are their physical meanings. I know only their numerical values.
2) How to deal with the problem of GTN in Compression? It is working fine with tension but while in compression it is unable to converge.

Qunyang Li's picture

Journal club for April 2018: Friction of atomically-thin sheets

Friction of atomically-thin sheets

Qunyang Li

Department of Engineering Mechanics, Tsinghua University

 

Introduction

Alejandro Ortiz-Bernardin's picture

A volume-averaged nodal projection method for the Reissner-Mindlin plate model

We introduce a novel meshfree Galerkin method for the solution of Reissner-Mindlin plate problems that is written in terms of the primitive variables only (i.e., rotations and transverse displacement) and is devoid of shear-locking.

Mechanics of Mushroom as a material

We recently characterized a unique material developed from root structure (Mycelium) of mushroom. Mycelium has a filamentous network structure with mechanics largely controlled by filament elasticity and branching, and network density. We report the morphological and mechanical characterization of mycelium. The monotonic mechanical behavior of the mycelium is non-linear both in tension and compression.

zappalorto's picture

The 7th edition of the International Conference on Fatigue of Composites (ICFC7)

The 7th edition of the International Conference on Fatigue of Composites is going to be held in Vicenza (Italy) from 4th to 6th of July 2018. The conference is organized by the Department of Management and Engineering at the University of Padova, under the patronage of the European Society for Composite Materials, the Committee on Composite Materials of the Japan Society of Material Science, the Italian Association for Stress Analysis and the Italian Group of Fracture.

oliver oreilly's picture

A Geometric Perspective on Gimbal Lock in the Apollo program

The phenomenon of gimbal lock rose in prominence during the time  of NASA's Apollo program. Inside the inertial measurement unit of the Apollo spacecraft was a stable (inertial) platform about which the spacecraft rotated. The hinged platform was suspended in two gimbals to give it three degrees of freedom. Its role was to give an accurate measure of the spacecraft's orientation. At a particular orientation of the spacecraft, the gimbals became coplanar and control torques became ineffective at stabilizing the platform.

karelmatous's picture

Solving Nonlinear PDEs with a priori accuracy using wavelets

We present a numerical method which exploits the biorthogonal interpolating wavelet family, and second-generation wavelets, to solve initial–boundary value problems on finite domains. Our predictor-corrector algorithm constructs a dynamically adaptive computational grid with significant data compression, and provides explicit error control. Error estimates are provided for the wavelet representation of functions, their derivatives, and the nonlinear product of functions.

distortion control in continum shell elements

Choose a channel featured in the header of iMechanica: 

Hi!

I am new to abaqus and am simulating biiaxial test on GFRP cross ply laminates. The simulation stops saying " excessive distortion of 2 elements". Can someone please suggest a detailed solution. 

Ps- im a beginner , so I request a detailed suggestion please.

 

Thanks.

Yash

Jingjie Yeo's picture

Multiscale modeling of keratin, collagen, elastin and related human diseases: Perspectives from atomistic to coarse-grained molecular dynamics simulations

https://doi.org/10.1016/j.eml.2018.01.009 Scleroproteins are an important category of proteins within the human body that adopt filamentous, elongated conformations in contrast with typical globular proteins. These include keratin, collagen, and elastin, which often serve a common mechanical function in structural support of cells and tissues. Genetic mutations alter these proteins, disrupting their functions and causing diseases.

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