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Drucker Prager Plasticity model

Hi All,

I am trying to code the Drucker prager plasticity model for the 2D plane strain case using consistent tangent modulus. I am using C++, therefore I would appreciate if anyone could share relevant materials which I could use and preferrably for the 2D case so it is not unnecessarily complicated.

 

Oleg Kirillov's picture

Call for abstracts: Mini-Symposium "Instabilities in Structural Mechanics and Fluid-Structure Interactions" at ESMC 2018

This is the first announcement of the

Mini Symposium "Instabilities in Structural Mechanics and Fluid-Structure Interactions"

Organizers:
Oleg Kirillov (Northumbria University, UK), Olivier Doare (ENSTA ParisTech, France)

In the frame of ESMC 2018 - 10th European Solid Mechanics Conference, July 2-6, 2018 Bologna, Italy

Mike Ciavarella's picture

3D Printing Grand Challenge

Abstract Submission Extended to March 1st 2017

More information

Michael A. McCarthy's picture

Marie Curie Early Stage Researcher (PhD student), Improving the crashworthiness of composite transportation structures

Applications are invited for a PhD position at the University of Limerick, Ireland, funded through the EU Marie Curie Early Stage Researcher Programme.

SALARY: €37,903 p.a. (plus family allowance of €4,589 p.a. where appropriate in accordance with Marie Skłodowska-Curie programme rules).

Topic: Development of discrete fastener-less joining technologies for impact protection devices

ASME 2017 IMECE: Fatigue and Fracture of Active Materials–Call for abstracts

Dear Colleagues:

Please, consider to attend the symposium entitled "Fatigue and Fracture of Active Materials" organized under track "Mechanics of Solids, Structures, and Fluids" in the International Mechanical Engineering Congress and Exposition (IMECE) ASME 2017 conference. The conference will be held in Tampa, Florida, November 6–9, 2017 (https://www.asme.org/events/imece).

Siva P V Nadimpalli's picture

PhD position in Prof. Nadimpalli's group at NJIT

Hello All,

There is a potential opening for a PhD student in Prof. Nadimpalli’s group at the New Jersey Institute of Technology starting from Fall2017. Candidates with good academic credentials and an interest to work in experimental research projects are encouraged to apply. Ideal candidate should have a master’s degree in mechanical/materials science/aerospace or related field with a good background in Solid Mechanics, Materials Science, and Experimental Methods (including but not limited to SEM, TEM, and nanofabrication methods).

Grants available EC funded "Materials resistant to extreme conditions for future energy systems", 12-14 June 2017, Kyiv - Ukraine

Dear colleagues,

I would like to inform you about a Works "Materials resistant to extreme conditions for future energy systems", 12-14 June 2017, Kyiv – Ukraine.

The Workshop is funded by the European Commission Enlargement Programme. There is no fee to attend.  Participants from the target countries* can apply for a Grant to cover their cost.  Eligible for Grants are those that work in or are citizens of a target country.

Soft Materials Mechanics and the 2017 ASME IMECE

Dear Colleagues,

The Soft Materials Mechanics Technical Committee (TC) is pleased to announce that the abstract submission process for the 2017 ASME IMECE in Tampa, FL is open. The TC symposium solicits abstracts from many disciplines represented from previous years (active materials, gels, biomaterials, 3D printing, and more) as well new subject areas and collaborations.

Issues with implementation of strain gradient plasticity framework of Niordson and Hutchinson (2003) in Abaqus UEL subroutine

I have implemented the rate-independent strain gradient plasticity framework of Niordson and Hutchinson (2003) in UEL. I was able to validate the results of the shear of infinitely wide thin layer between two rigid surfaces (Niordson and Hutchinson, 2003). However, the UEL subroutine fails to converge for the more complex problem of the shear of finite width slab. I suspect the convergence issues are arising out of internal elastic-plastic boundary conditions and the yield criteria. I have few doubts in this regard.

 

Issues with the implementation of Strain gradient plasticity framework of Niordson and Hutchinson (2003) in ABAQUS UEL

I have implemented the rate-independent strain gradient plasticity framework of Niordson and Hutchinson (2003) in UEL. I was able to validate the results of the shear of infinitely wide thin layer between two rigid surfaces (Niordson and Hutchinson, 2003). However, the UEL subroutine fails to converge for the more complex problem of the shear of finite width slab. I suspect the convergence issues are arising out of internal elastic-plastic boundary conditions and the yield criteria. I have few doubts in this regard.

 

Is there any dissymetry of lift in the forward flight of the helicopter after applying the cyclic control?

Dear friends,

I was curious about the time varying loads on the helicopter blades in the forward flight. After reaching lots of books and documents, I came to know that some control (cyclic) is applied to take care of the dissymetry of lift in the forward flight. My question is, if the dissymetry of lift is eliminated by applying the cyclic control or by blade flapping (whatever), then why the load should vary with time for the 90 and 270 position of the blade? Can anybody explain this? Please let me know the justification. I am really curious about it. 

Thanks

sergkuznet's picture

Call for Abstract Submission to the USNCCM14: Modeling Materials with Coupled Physics

Dear Colleagues:

The 14th U.S. National Congress on Computational Mechanics (USNCCM14) will be held at the Palais des Congrès de Montréal, QC, Canada,  July 17-20, 2017 (http://14.usnccm.org/).

Giorgio Carta's picture

“Deflecting elastic prism” and unidirectional localisation for waves in chiral elastic systems

For the first time, a design of a “deflecting elastic prism” is proposed and implemented for waves in a chiral medium. A novel model of an elastic lattice connected to a non-uniform system of gyroscopic spinners is designed to create a unidirectional wave pattern, which can be diverted by modifying the arrangement of the spinners within the medium. This important feature of the gyro-system is exploited to send a wave from a point of the lattice to any other point in the lattice plane, in such a way that the wave amplitude is not significantly reduced along the path.

Jie. Yin's picture

One Ph.D. opening in Mechanics of Materials for 2017 Fall

One Ph.D. position will be available in the Applied Mechanics of Materials Lab of Mechanical Engineering Department at Temple University, Philadelphia, PA, USA. The position will start in the coming Fall 2017

Yaning Li's picture

PhD position in Mechanics of Solids and Structures for Fall 2017

 

A Ph.D position in mechanics of solids and structures is now open for Fall 2017 in Mechanical Engineering Department at the University of New Hampshire. We are looking for highly motivatied students to work on NSF and DoD projects.

The applicant is also qualified for applying for a one-year Fellowship.

Please contact Professor Yaning Li for details.

Email: yaning.li@unh.edu

Web: http://www.unh.edu/yaning-lab/

 

Nayebi's picture

New distortional yield surface model: Application in cyclic uniaxial and multiaxial loading: Rokhgire, Nayebi*, Chaboche

This paper is concerned with the ratcheting prediction for steels. The yield surface evolution is integratedin the elastoplasticity analysis by a new proposed model. First, the new proposed model of DistortionalYield Surface (DYS) is developed and then ratcheting under different uniaxial and multiaxial cyclicloadings is investigated.

postdoc opportunity in computational stochastic mechanics at NRL

There is up to 3 years funding available for a postdoctoral fellowship in computational stochastic mechanics pertaining to microstructure property relationships in metal alloys. The position is open to US citizens and permanent residents. Please see the link below for more details as well as by sending an email to: kirubel.teferra@nrl.navy.mil. Thank you.

Postdoctoral Position at Nanyang Technological University (NTU) SG in computation mechanics

Description

(1) Computational mechanics and multiphysics modelling of relevant areas, including the soft matter, 3D printing, fuel cell, bio-fluid and cell in microfluidics

(2) Supervision of undergraduate/postgraduate students

 

Job requirements

1)  PhD degree in Mechanical/Material Engineering or related fields

(2) Strong background in computational physics and solid/fluid mechanics

(3) Analytical and independent problem solving skills and ability to develop theoretical models and to implement large-scale numerical computation

Xin-Lin Gao's picture

Special Issue — John D. Eshelby Centennial

This special issue has recently been published in Journal of Micromechanics and Molecular Physics in honor of Prof. John Eshelby’s 100th Birthday.

The Editorial Forward by Prof. Shaofan Li is available at:

 

http://www.worldscientific.com/doi/pdf/10.1142/S242491301602001X

The 13 papers included in the special issue can be viewed and downloaded at:

 

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