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Emilio Martínez Pañeda's picture

Phase field modelling of fracture and fatigue in Shape Memory Alloys

Dear iMechanicians. I hope that the following paper is of interest to you. We develop the first phase field formulation for fracture (and fatigue) in Shape Memory Alloys. Its potential is demonstrated by solving a variety of paradigmatic 2D and 3D boundary value problems, from R-curves to fatigue cracking of a NiTi biomedical stent.

M. Simoes, E. Martínez-Pañeda. Phase field modelling of fracture and fatigue in Shape Memory Alloys. Computer Methods in Applied Mechanics and Engineering 373 (2021) 113504

Teng Li's picture

EML Webinar on 4 November 2020 on Topological adhesion, wet and elastic by Zhigang Suo

EML Webinar on 4 November 2020 will be given by  Zhigang Suo, Harvard University. Discussion leader: Jimmy Hsia, Nanyang Technological University

Title: Topological adhesion, wet and elastic

D.Rittel's picture

New results on shock mitigation of MC gels to appear in JMPS

This recently accepted paper, to appear in the Journal of the Mechanics and Physics of Solids, reports our detailed experiments on shock energy absorption of methylcellulose hydrogels. A phenomenological model is developed and validated that allows for a quantitative estimate of the attnuated signal as a function of the gel layer thickness and composition.

Antonio Papangelo's picture

Numerical and experimental analysis of the bi-stable state for frictional continuous system

Friction induced vibrations are a very well known problem in engineering applications. Sometimes they are referred to be unpredictable, intermittent, capricious (!!!) and particularly experimentalists know this very well. Here, by means of numerical simulations and experimental measurements, we highlight how capriciousness may arise from the multistable behavior of frictional systems, i.e. their characteristic to show multiple stable solutions for the same set of governing parameters. Hence initial conditions and perturbations become crucial.

Antonio Papangelo's picture

How contact area decreases under shear load in soft bodies?

A very good paper has just been published in JMPS by  J.C. Mergel, J. Scheibert, R.A. Sauer "Contact with coupled adhesion and friction: Computational framework, applications, and new insights". it shows the results of numerical simulations with soft bodies sheared by a tangential force. There is a vivacious discussion in Literature if the contact area reduces due to adhesion or due to large deformation.

Invitation to attend Mr. Ran Tao PhD defense at COHMAS lab, KAUST.

 

Title:

Enhancing the bonding of CFRP adhesive bonding through laser-based surface preperation sterategies.

Abstract:

Ajeet Kumar's picture

A finite element formuation for a direct approach to elastoplasticity in special Cosserat rods

A finite element formulation is presented for a direct approach to model elastoplastic deformation in slender bodies using the special Cosserat rod theory. The direct theory has additional plastic strain and hardening variables, which are functions of just the rod's arc-length, to account for plastic deformation of the rod. Furthermore, the theory assumes the existence of an effective yield function in terms of stress resultants, i.e., force and moment in the cross-section and cross-section averaged hardening parameters.

Teng Li's picture

EML Webinar on October 28, 2020 on Multi-scale and Trans-scale Analysis in Particle-laden Turbulence

EML Webinar on 28 October 2020 will be given by Prof. Xiaojing Zheng, Lanzhou University. Discussion leader: Prof. Yujie Wei, Institute of Mechanics, Chinese Academy of Sciences.

Title: Multi-scale and Trans-scale Analysis in Particle-laden Turbulence

Wenbin Yu's picture

Global Composites Experts Webinar by Kevin Potter

Title: Automating the lay-up of geometrically complex composite structures made from preimpregnated reinforcements: a route to a roadmap

Speaker: Dr. Kevin Potter

Time: 10/29, 11AM-12PM EST.

Please go to https://www.purdue.edu/cmsc/events/2020-webinars/ to register for this talk.

 

carpick's picture

The Mechanochemistry Discussions

Dear iMechanical Community

Jinxiong Zhou's picture

A predictive deep-learning approach for homogenization of auxetic kirigami metamaterials with randomly oriented cuts

This paper describes a data-driven approach to predict mechanical properties of auxetic kirigami metamaterials with randomly oriented cuts. The finite element method (FEM)was used to generate datasets, the convolutional neural network (CNN) was introduced to train these data, and an implicit mapping between the input orientations of cuts and the output Young’s modulus and Poisson’s ratio of the kirigami sheets was established. With this input–output relationship in hand, a quick estimation of auxetic behavior of kirigami metamaterials is straightforward.

matthew.grasinger's picture

Architected Elastomer Networks for Optimal Electromechanical Response

Dear Colleagues,

This is the preprint of an article on the design of elastomer networks for optimal electromechanical response that will appear in JMPS. We explore how various structural properties of an elastomer network (e.g. density of cross-links, fraction of loose-end monomers, orientation density of chains, etc.) affects both its bulk elastic and dielectric properties, and its performance as an actuator. (https://doi.org/10.1016/j.jmps.2020.104171).

 

Siddiq Qidwai's picture

NSF: Mechanics of Materials and Structures (MoMS) Program Listserv

Dear US Academic Researchers,

If you want to get on to the announcement listserv dedicated to the Mechanics of Materials & Structures (MoMS) program at the National Sciecne Foundation, then perform this task:

Send an email to listserv@listserv.nsf.gov with the message

subscribe MOMS Full_Name

e.g., subscribe MoMS John Smith

Zhen Yin's picture

Journal Club for October 2020: Toughening Transparent Ceramics with Bio-inspired Architectures

Toughening Transparent Ceramics with Bio-inspired Architectures

Zhen Yin (1, 2)

1 McGill University, Canada

2 Max Planck Institute for Intelligent Systems, Germany

mohsenzaeem's picture

Phase-field modeling of crack propagation in polycrystalline materials

A phase-field model based on a modified form of the regularized formulation of Griffith’s fracture theory is presented to investigate intergranular and transgranular crack propagations in polycrystalline brittle materials. Grains and grain boundaries are incorporated in the crack initiation and propagation model based on a phase-field model for grain growth, in which the elastic anisotropy varies based on the grain orientation angle, and the grain boundary energy is related to the misorientation angle of the adjacent grains.

Wenbin Yu's picture

Global Composites Experts Webinar by Ken L Reifsnider

Title: Direct coupling predicting the strength and life of fiberous composite laminates

Speaker: Dr. Ken L Reifsnider

Time: 10/8, 11AM-12PM EST.

Please go to https://www.purdue.edu/cmsc/events/2020-webinars/ to register for this talk.

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