Blog posts

Error using Neo-hookean in abaqus

Submitted by Jaswanth_kumar on Sun, 09/02/2018 - 06:33

Hi everyone,

I am trying to solve a problem of twisting a hyperelastic material(compressible neo-hookean) in abaqus.

The problem has been taken from 10.12.5 TWISTING COLUMN in the textbook NONLINEAR SOLID MECHANICS FOR FINITE ELEMENT ANALYSIS: STATICS (Javier Bonet,Antonio J. Gil,Richard D.Wood).

Lamda and mu are given as 100 each, so I have calculated the Neo-hookean coefficients for abaqus which came out to be C10=50 and D1=0.012

I am using abaqus static-general with time steps of

*Step, name=Step-1, nlgeom=YES, inc=10000

Faculty position at University of Michigan, Ann Arbor

Submitted by M D Thouless on Sun, 09/02/2018 - 02:48

job

A faculty position in experimental mechanics / materials is available in the Department of Mechanical Engineering at the University of Michigan, Ann Arbor. The closing date is December 1, 2018. Please see the attached advertisement for details.

Anomalous bulging behaviors of a dielectric elastomer balloon under internal pressure and electric actuation

Submitted by tongqing.lu on Sun, 09/02/2018 - 01:50

When a clamped membrane of elastomer is subject to a lateral pressure, it bulges into a hemispherical balloon. However, for a clamped membrane of dielectric elastomer (DE) under a lateral pressure as well as a voltage through the thickness, it may bulge into a regular hemispherical balloon or an irregular shape. This work focuses on the anomalous bulging behaviors (i.e. the irregular bulging shape) of a DE balloon under electromechanical coupling loading.

Introduction to the Unified Mechanics Theory

Submitted by Cemal Basaran on Fri, 08/31/2018 - 23:04

research

continuum mechanics

continuum damage mechanics

fracture

Fatigue

fatigue life prediction

Plasticity

viscoplasticity

failure

configurational mechanics law of thermodynamics

thermodynamics

Entropy generation

The attached poster page has a self explanatory introduction of the Unified Mechanics Theory.

orthotropic

Submitted by vbabbas on Fri, 08/31/2018 - 22:28

education

hello all.

I work on the plates laminate orthotropic, in the calculation of the constatnte of rigidities I found two matrices of rigidity which are mantionent on the two figures following:

somebody can explain to me which is the matrix right, and thank you by advance.

PhD position, Computational Mechanics, Germany

Submitted by Hauke Gravenkamp on Fri, 08/31/2018 - 17:19

job

CLOSED

PhD positions in mechanics of metamaterials at the University of Minnesota

Submitted by stefanogonella on Fri, 08/31/2018 - 14:21

PhD positions are available at the University of Minnesota in the group of Prof. Stefano Gonella. The positions are in the general area of mechanics and physics of solids and structures, with emphasis on mechanical metamaterials. Topics of current interest are:

1) Topological metamaterials;

2) Nonlinear waves in metamaterials and architected solids;

3) Tunable and programmable metastructures.

Journal Club for September 2018: Nanomechanics of Covalent Crystals and Elastic Strain Engineering

Submitted by Yang Lu on Fri, 08/31/2018 - 14:12

nanomechanics

in situ experiments

elastic strain engineering

ultra-strength

nanoscale covalent crystals

Nanomechanics of Covalent Crystals and Elastic Strain Engineering

Yang Lu

Department of Mechanical Engineering, City University of Hong Kong

Experimentally informed micromechanical modelling of cement paste: An approach coupling X-ray computed tomography and statistical nanoindentation

Submitted by shavijabranko on Fri, 08/31/2018 - 06:44

Our group has recently published an article wherein we propose the use of X-ray computed tomography coupled with statistical nanoindentation for simulating the mechanical properties of quasi-brittle materials. The approach is used for simulating tensile properties of hardened cement paste.