Blog posts

3D printed Polyurethane : Viscoelastic experimental characterization and computational modelling

Submitted by mokarram76 on Sat, 07/18/2020 - 12:25

Additve manufacturing; 3D printing; Viscoelastic characterization; Polyurethane; Architected materials; Constitutive modelling

Digital Light Synthesis (DLS) technology creates ample opportunities for making 3D printed soft polymers for a wide range of grades and properties. In DLS, a 3D printer uses a continuous building technique in which the curing process is activated by an ultra-violet (UV) light. In this contribution, EUP40, a recently invented commercially available elastomeric polyurethane (EPU) printed by the DLS technology, is experimentally characterized.

Immediate Postdoc Position in Soft Robotics at NCSU

Submitted by Jie. Yin on Fri, 07/17/2020 - 19:51

job

postdoctoral position

soft robotics

Applications are invited for an immediate postdoctoral associate opening in the broad area of soft robotics in the Applied Mechanics of Materials Lab of Mechanical and Aerospace Engineering Department at North Carolina State University, Raleigh, NC, US.

This project will focus on bioinspired multifunctional high-performance soft robots in manipulation and locomotion.

EML Webinar by Prof. Yonggang Huang on relation between blood pressure and pulse wave velocity

Submitted by Teng Li on Fri, 07/17/2020 - 15:11

EML Webinar on July 22, 2020 will be given by Professor Yonggang Huang, Northwestern University via Zoom meeting. Discussion leader: Vicky Nguyen, Johns Hopkins University.

Title: Relation between blood pressure and pulse wave velocity

Time: 7 am California, 10 am Boston, 3 pm London, 10 pm Beijing on July 22, 2020

Input file for the CPFE VUMAT in Nonlinear finite elements for continua and structure

Submitted by rctron on Fri, 07/17/2020 - 02:46

Crystal plasticity

nonlinear finite element analysis

ABAQUS

Ted Belytschko

book

I am learning crystal plasticity and its implementation as VUMAT subroutine from the book Nonlinear finite elements for continua and structure. I am aiming to gain more insight about the implementation by studying the poly-slip, rate-dependent, single crystal plasticity subroutine provided in the solution manual.

However, I couldn't reproduce the example in the book successfully, as I believe I have made errors in defining the material properties in the Abaqus input file. So, can someone please provide the input file for the associated VUMAT subroutine?

Ph.D. and postdoc positions in mechanics, materials, and flexible electronics

Submitted by Xueju Sophie Wang on Thu, 07/16/2020 - 18:19

job

Two Ph.D. positions and one postdoc position are available in Wang Research lab (https://www.wangresearchlab.com) in Mechanical Engineering at the University of Missouri, Columbia.

Ph.D. positions

PhD student or postdoc position in “Atomistic Computer Simulation of Grain Boundary Structure and Mechanics”

Submitted by TobiasBrink on Thu, 07/16/2020 - 16:48

job

grain boundaries

nanoscale thermodynamics

dislocations

computational materials science

The Max-Planck-Institut für Eisenforschung (Düsseldorf, Germany) offers a position in the department Structure and Nano-/Micromechanics of Materials (Prof. G. Dehm): PhD student or postdoc position in “Atomistic Computer Simulation of Grain Boundary Structure and Mechanics”

Understanding how grain boundaries influence plasticity will lead to significant advances in material design. In the context of the department’s research, the overarching aim of this PhD project is to connect grain boundary structures in fcc metals to physical properties.

Soterix Medical: Individualized Modeling & Planning for Stroke Treatment

Submitted by Philippe on Thu, 07/16/2020 - 16:11

Transcranial direct current stimulation (tDCS) benefits from individualized 3D modelling and simulation. I recommend anyone wanting to learn more about work in these area check out this webinar on July 30th:

https://register.gotowebinar.com/register/556126791558271247?source=IMechanica

An improved semi-analytical solution for stress at round-tip notches

Submitted by Dr. Hanaor - D… on Thu, 07/16/2020 - 14:25

Highlights

•: A semi-analytical model is developed for the notch tip maximum stress.
•: Application of the formula to U and blunt V-notches is demonstrated.
•: The results can be used to assess the brittle failure of notched components.