Skip to main content

research

Poisson Contraction and Fiber Kinematics in Tissue: Insight from Collagen Network Simulations

Submitted by Mohammad Refat… on
research
fiber network
soft tissue mechanics
Poisson's effect

Connective tissue mechanics is highly non-linear, exhibits a strong Poisson effect and is associated with significant collagen fiber re-arrangement. Although the general features of the stress-strain behavior in tension and compression and under uniaxial, biaxial and shear loading have been discussed extensively, especially from the macroscopic perspective, the Poisson effect and the kinematics of filaments have received less attention. In general, the relationship between the microscopic fiber network mechanics and the macroscopic experimental observations remains poorly defined.

About periodic BC for large mesh in ABAQUS

Submitted by Bowen Liang on
Forums
Ask iMechanica
Choose a channel featured in the header of iMechanica
research
Free Tags
#ABAQUS
ABAQUS periodic
parallel

Hi all,

I'm using ABAQUS-2016 to run a parallel simulation, and I met a problem for assigning periodic BC in large mesh size. I want to make four nodes to be periodic with each other. Normally, I give the node pair in the equation option as:
*Equation
2
nset_1, 2, 1.
nset_2, 2, -1.
*Equation
2
nset_1, 2, 1.
nset_3, 2, -1.
*Equation
2
nset_2, 2, 1.
nset_4, 2, -1.

Perfectly matched layers

Submitted by setareh on
research

Hello,

 

I am looking for a practical reference/example on how to implement the perfectly matched layers for mechanical problems in a Finite Element code. I want to model a plate where it is surrounded by the PML from all sides, like a piece of earth crust surrounded by the land. The sources which I see for PML, are mostly in the area of electromagnetics.

 

Your inputs are appreciated.

Setareh

Stress induced by diffusion, curvature, and reversible electrochemical reaction in bilayer lithium-ion battery electrode plates

Submitted by zhan-sheng guo on
research

In this paper, a new reaction-diffusion model, coupling the reversible electrochemical reaction, Lithium (Li) diffusion, and bending, is proposed to investigate the curvature, neutral axis movement, and stress in bilayer electrode. Bending curvature and stress, for the first time, are analytically and numerically investigated relate to both the diffusion and the reversible electrochemical reaction. The results reveal that the reversible electrochemical reaction retards the lithiation process, leading to the slowing down of diffusion process.

Photo-controlled patterned wrinkling of liquid crystalline polymer films on compliant substrates

Submitted by Fan Xu on
research
Buckling and Post buckling
bifurcation
Liquid Crystalline Elastomers
pattern formation

Photo-chromic liquid crystalline polymer (LCP) is a type of smart materials which are sensitive to light. Here we harness its photo-mechanical response to flexibly control surface patterning, through modeling a film involving homeotropic nematic liquid crystals with director perpendicular to the polymer film attached on a compliant substrate. Theoretical and numerical analyses were conducted to explore the surface instability of such film/substrate systems under both uniform and non-uniform illuminations by ultraviolet (UV) light, respectively.

Morphology of voltage-triggered ordered wrinkles of a dielectric elastomer sheet

Submitted by Guoyong Mao on
research

Wrinkles have attracted a lot of attention in the fields of material science and engineering applications. And dielectric elastomer is a potential smart material which has advantages including large deformation, light weight, high energy density, quick response and et al. We try to use DE to make a wrinkle structure which is quick response and reversible easily.

Dynamic compressive behaviour of cellular materials: a review of phenomenon, mechanism and modelling

Submitted by Yongle Sun on
research
cellular materials
dynamic behaviour
impact
blast

Dynamic compressive behaviour of cellular materials is crucial to their applications in energy absorption, ballistic mitigation and blast/impact protection. The recent research progress in this subject has led to an improved understanding of the experimental, analytical and numerical observations. This review focuses on the aspects ofphenomena, mechanisms and modelling on the concerned subject. Attention is paid to linking macroscopic dynamic compressive behaviour with the subscale influential factors.

Lab-on-Skin: A Review of Flexible and Stretchable Electronics for Wearable Health Monitoring

Submitted by Matt Pharr on
research
flexible electronics
stretchable electronics
health monitoring

Skin is the largest organ of the human body, and it offers a diagnostic interface rich with vital biological signals from the inner organs, blood vessels, muscles, and dermis/epidermis. Soft, flexible, and stretchable electronic devices provide a novel platform to interface with soft tissues for robotic feedback and control, regenerative medicine, and continuous health monitoring.

Subscribe to research