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Qiming Wang's picture

Beyond Wrinkles: Multimodal Surface Instabilities for Multifunctional Patterning

Beyond Wrinkles: Multimodal Surface Instability for Multifunctional Patterning

Qiming Wang, Xuanhe Zhao

Email: qimingw@usc.edu, zhaox@mit.edu

3 Research Fellowships at University of Southampton for a European Project on Smart Bearings

Looking to take the next step in your academic career? Look no further – three exciting opportunities are available for ambitious researchers to join the UK’s most dynamic research groups for engineering research and education. 

Problem in ANSYS Transient thermal analysis

I want to do a transient thermal analysis in butt welded joint.The heat flow I have given 3200 watt(Q = efficiency x current x voltage = 0.8 x 160 amp x 25 volt)to the welding zone, given 20 load step(as welding is completed in 20 sec),convection co-efficient = 11.14, emissivity = .4 and applied both boundary condition convection and radiation on every surface except welding zone. But after solving the minimum temperature of the plate is coming in negative.Can anybody tell me what i am missing?

grassl's picture

Damage plasticity model for concrete failure CDPM2

Those involved in the modelling of the failure of plain/reinforced concrete using damage and plasticity might be interested in our webpage

http://petergrassl.com/Research/DamagePlasticity/CDPMLSDYNA/index.html

which we have created to support our concrete damage plasticity model CDPM(2) in LS-DYNA. You can find there a number of example input files, reports and our implementation of the model in the form of a user subroutine.

 

How can I use acoustic or ALE model in Abaqus?

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How can I use acoustic or ALE model in Abaqus?

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Amit Pandey's picture

Concept of Yield Point or Elastic Limit?

A similar discussion on this forum raised many interesting point about- Stress or strain: which one is more fundamental?

http://imechanica.org/node/1001 

On a similar note I would like to address this decade old fundamental question on how do we define yield point of a material?  

 

2 PhD and 4 Postdoc positions in mechanics of composites @ Ghent University (Belgium)

Two PhD (4 years) and four Postdoc (2-4 years) vacancies are available in the composites research group at Ghent University in Belgium. The different open positions deal with composite heat exchangers, simulation of large wind turbine blades, fatigue of composites, radically new sensing technologies for composites, business development in lightweight materials for automotive,... More information can be found on http://www.composites.ugent.be/PhD_job_vacancies_PhD_job_positions_compo....

Postdoctoral positions on Predictive Simulations at Purdue University

Purdue University is seeking applications from outstanding candidates to fill several Postdoctoral Scholar positions to work on atomistic and continuum simulations of physical and chemical processes at extreme conditions of pressure and temperature. The successful candidates will join a multidisciplinary team including modelers and experimentalists working at Purdue, Los Alamos National Laboratory and Stanford University.

SPH contact with Eulerian Elements

I am attempting to model high-pressure gas flow through the granular medium using Abaqus Explicit. I have used SPH modelling for granular particles and the gaseous medium using Eulerian elements. 

 A node-based surface is created for the SPH particles. I am having trouble establishing contact between the eulerian elements surface and the surface of SPH particles. 

Any help would be really appreciated

Award Nominations open for Society for Engineering Science

The Society of Engineering Science oversees several awards and honors to members and eminent scholars of the field. A total of five medals are offered on an annual basis as well as election to Fellow grade of the Society. 

Please visit the website http://ses.egr.uh.edu/node/8 for detailed information and electronic versions of the nomination forms.

SES Fellows Nominations

Certification training on Fatigue Durability and Fracture Mechanics

 

In-Depth, Real-Time Training Programs

 

Online, Offline, Certification Training Programs

 

We offer real time online, offline, classroom, practical training programs. Covering from basic theory to advanced practical implementation of the same. Our team is highly qualified with decades of experience in the field and guided several PhD Scholars and students

www.fatiguedurability.com || Institute of Structural Integrity and Failure Studies

WELCOME TO ISIFS

Design to Life Assessment

Institute of Structural Integrity and Failure Studies engages with the industry, academia and interested community in encouraging the knowledge sharing and news about advanced technology developments to make the engineering community actively participate in resolving the problems faced by industries and publishing the results to achieve competitive expertise in the global scene.

Call for Paper : 2nd International Conference on FatigueDurability India 2016 - 28-30th September 2016

2nd International Conference and Exhibition onFatigue, Durability and Fracture Mechanics

& Symposium on

Condition Assessment / Residual Life Assessment and Extension28 – 30th September 2016 @  DELHI, INDIA

 

 

FatigueDurability India 2016 invites technical papers from all Academicians/ individuals/companies associated with engineering design, analysis, testing, instrumentation, research on Fatigue Durability & Fracture Mechanics or related technologies .

Fangsen's picture

Research Scientist at IHPC A*STAR Singapore

You will be responsible for using numerical methods and computer software to design, develop and validate new devices for a couple of projects. 

Requirements:

  • PhD in Engineering  with good knowledge of fluid dynamics  and solid mechanics
  • Strong background in Vibro-acoustics, Building Ventilation, Fluid Structure Interaction (FSI)
  • Experience in numerical simulation software such as ANSYS (CFX or FLUENT), Virtual Lab / Acoustics, SOLIDWORKS

 

We regret that only shortlisted candidates will be notified.

Viscoelastic damping behavior of structural bamboo material and its microstructural origins

In this study, the intrinsic viscoelastic mechanical behavior of a hierarchical bio-composite, structural bamboo material, was experimentally investigated and correlated with its microstructural constituents and molecular building blocks. The macroscopic viscoelastic responses of bulk bamboo at ambient temperature and dehydrated condition were evaluated through dynamic compression experiments with various loading frequencies, whereas the localized viscoelasticity of bamboo's microstructural phases, viz.

Teng Li's picture

SES2016 is open for abstract submission

Dear Colleagues,

The 53rd Annual Technical Meeting of the Society of Engineering Science (SES2016) will be hosted by the University of Maryland (UMD) during 2-5 October 2016 at the College Park Marriott Hotel & Conference Center.  

Parallel computing for non-local damage model in abaqus

Hello all,I am simulating epoxy damage using a non-local damage model through abaqus user subroutine UMAT.Based on the idea of Prof. Bazant's non-local treatment, the non-local damage at a particular integration point is obtained by averaging the local damage values of all the integration points within a characteristic length (Lc) of that point.

group velocity Vs phase velocity

hi to all,

do anyone know about ultrasonic lamb wave group velocity and phase velocity and differences between them?

I appreciate it.

 

vrh59ir's picture

Local integration of 2-D fractional telegraph equation via local radial point interpolant approximation

In this article, a general type of two-dimensional time-fractional telegraph equation explained by the Caputo derivative sense for (1 < α ≤ 2) is considered and analyzed by a method based on the Galerkin weak form and local radial point interpolant (LRPI) approximation subject to given appropriate initial and Dirichlet boundary conditions.

Simulation of temperature differences in melt pool

Hi everyone can anyone help me with the simulation of temperate differences in melt pool during laser additive manufacturing? I am confused as to how to start the project.

Zhigang Suo's picture

Linear form

These notes are part of my notes on linear algebra.  I believe that textbooks of linear algebra give a bad definition of linear form.  The last section of the notes explain why it is bad.  I also give examples of linear form everyday life and from physics.  Given the vector space of distance, both force and electric field are dual spaces of the space of distance.  They are distict dual spaces of the space of distance, and they are not dual spaces to each other.

Large strain viscoelasticity - help with CETOL?

 

I am having problems with large strain viscoelasticity, where I am using Prony series to model the visco part. There is no default for the parameter CETOL, nevertheless, by reducing this tolerance or reducing the time step I am getting results that make no sense.

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