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Kmomeni's picture

Graduate research position - Modeling of composites (US Citizens only)

A graduate position is opened in Advanced Hierarchical Materials by Design Lab at Louisiana Tech University on multiscale modeling of composites. The candidates must have earned a degree in Mechanical Engineering or related fields, and be a US Citizen. Candidates with a solid background in theoretical and computational mechanics, specifically continuum mechanics and finite element modeling are preferred. Familiarity with FEM software package COMSOL is a plus.

bilelsandel's picture

looking for phd position in computational mechanics

hello 

am looking for a phd position in compututional mechanics i have a good backgroun in numercial simulation and mathematical modeling with MS in mechanical engineering i was working in many topic from material modeling (dammage ,metal forming ...) composite modeling and simulation (continue element of composite shell in high frequency,hommoginazation method crush simulation ,... ) i have a experience in biomechanic modeling and simulation 

i have a good programming skills : fortran c++,python 

finite element ,boundary element,xfem

alicia's picture

Multiple postdoc openings at UC San Diego (USA) and Cardiff University (UK) + two PhDs at Cardiff University (UK)

Applications are sought for multiple Post-Doctoral Research Associates at University of California, San Diego (USA) and Cardiff University (UK) and two PhDs (Cardiff) to join a very active cross-continental M2DO research lab. The primary research focus is to develop topology optimization for multiscale and multiphysics problems optimizing materials and structures. The research members are required to travel between US and UK regardless of their bases.  

ESIS's picture

Discussion of fracture paper #11 - Fracture processes and phase field modelling

In the latest volume of Engineering Fracture Mechanics there is an interesting paper about the calculation of crack growth paths by use of a phase field model. The considered material is inhomogeneous and that causes the crack to follow a winding path through the material. The material structure is from a CT scanned micro-structure of a cement-based porous material. The paper is:

yann.charles's picture

PostDoctoral Position on polymer composite material modeling - University Paris 13, Paris, France

no longer available.

--

A 12 months post Doctoral position is avalaible on mechanical and numerical modeling fields at LSPM, univ. Paris 13, France.

The aim  is the development of a theoretical and numerical modeling approach in order to describe the mechanical properties of polymer composite material and structures reinforced by CarbonNanoTube. Once the description of mechanical properties achieved, the extension of the modeling  framework to the electrical and thermal properties and their coupling to the mechanical behavior might be considered.

ABAQUS: Thermal stresses in a rectangular composite plate

Trying to model a crossply square plate with a sinusoidal temperature loading (uniform along the thickness). I am trying to match the results by Kant et al 2008 and Rohwer et al 2001. I am modeling the compoosite as a 3-D solid elements (making a part and dividing into 4 layers). I always obtain transverse shear stress on the 90 degree layer at 0,b/2,z to be zero.  My results match with that of the paper when I have a single layer of orthotropic material but they dont match when I have 4 layers of equal thickness and an aspect ratio of 5 (length/thickness).

 

Beam elements in Abaqus

Hi every body,

I'm tring to make a beam by using beam elements in Abaqus like this:

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How to set the element coordinate system for truncated cone composite shell in Ansys ?

Choose a channel featured in the header of iMechanica: 

Hello, everyone! 

Now, I'am trying to analysis a truncated cone composite shell subjefcted to compression load in Ansys. But I don't know how to set the element coordinate system. I want to set the circumferencial direction as fiber direction, and the thickness direction and generatrix direction as transverse direction. Can any one teach me how?

Thankful to any adivice? 

Debonding simulation - XFEM fracture criterion - delamination

Hello

I am using Abaqus/CAE 6.10 to simulate a Debonding test (cohesive behavior for composite delamination). 

I ran a Abaqus debonding simulation example (from Abaqus online documentation - Abaqus Benchmark Manual - 2.7.1 Delamination analysis of laminated composites).

The Abaqus/Explicit three-dimensional model with surface-based traction-separation behavior used a surface contact interaction property with:

- default Cohesive behavior

- XFEM-based LEFM (using VCCT) fracture criterion.

DCB test - CONTINUUM SHELL ELEMENTS vs SOLID ELEMENTS

Hello,

I modelled a 3-D DCB (Double Cantilever Beam) test specimen to simulate crack propagation (delamination) in composite materials.

To do so, I used surface cohesive properties between plates in Abaqus/Explicit, and applied a displacement at the plates tips.

When I used continuum shell elements the crack propagated as expected and the delamination occurred.

Open Position in Computation Solid Mechanics

Position: Computational Solid Mechanics Research Engineer

Company: Global Engineering Research and Technologies (GERT)

Location: Tucson, Arizona, USA 

Full/Part time: Full Time. 

Benefits: Yes.

Salary: Commensurate with Qualifications.

Remote employment: No. Must be willing to relocate to Tucson, AZ.

Gouse's picture

Fatigue models for short fibre reinforced composites

Hi,

I am working on short glass fibre reinforced composites.

Is there a material model which can predict the fatigue behaviour of the composite structure at high temperature.

Thank you

Regards

Ghouse

Lifeng Wang's picture

Mechanics of Composites, 8-12 June 2014 at Stony Brook University, NY, USA [Deadline extended to October 30, 2013]

The 1st International Conference on Mechanics of Composites will be hosted by Stony Brook University, Long Island, New York, USA. This conference intends to bring forward the best research and applications on composite materials and structures. The conference has the support of Composite Structures, an International Journal of Elsevier.

The Conference will take place from 8-12 June 2014. 

Mechanical/Civil/ Material Science Engineer /Physicist (Ph.D.student/postdoc-position) at Hamburg University of Technology(TUHH)

The Institute of Continuum and Material Mechanics of the Hamburg
University of Technology TUHH offers a temporary research position
starting from 1.12.2013  until 30.06.2016, to a

Mechanical Engineer/ Civil Engineer/Physicist/Material Science Engineer
(Ph.D.-student/postdoc-position) seeked for modelling and simulation of
a multiscaled composite.

Salary regulations according to German standard «EGr. 14 TV-L«,

Ref.-No.: D-13-129

Lifeng Wang's picture

Call for Papers: Mechanics of Composites, 8-12 June 2014 at Stony Brook University, NY, USA

The 1st International Conference on Mechanics of Composites will be hosted by Stony Brook University, Long Island, New York, USA. This conference intends to bring forward the best research and applications on composite materials and structures. The conference has the support of Composite Structures, an International Journal of Elsevier.

The Conference will take place from 8-12 June 2014. 

ANSYS , LS-DYNA: simulation of full penetration impact

Is
there any one here who could help me through the step-by-step creating and analyzing
a 3D simulation of ballistic, full penetration impact of a steel, rigid
projectile into the 3D composite plate?

note1: as i know,
available HASHIN damage model in ABAQUS isn't an appropriate tool to do
that. because it has an important restriction that confined you in the
"2D" damage analysis of composites and using 2D planar elements only.

duping812's picture

Tunable electrical and mechanical responses of PDMS and polypyrrole nanowire composites


Journal of Physics D: Applied Physics

Ping Du, Xi Lin, Xin Zhang

Volume 46, Number 19, Page 195303

doi:10.1088/0022-3727/46/19/195303

A generic experimental procedure is presented in this work to enhance
the electrical responses of polydimethylsiloxane (PDMS) through
incorporation of conducting polymer nanowires, while maintaining the
desirable mechanical flexibility of PDMS. The conducting polypyrrole

ebarbero's picture

ERRATA for Beyond plain weave fabrics-I. Geometrical model, Composite Structures, 2010

p. 1426, last par., should read (revision in [brackets]): "Satin weaves are depicted on Figs. 1c, 3d and e, again with the fills horizontal and the warps vertical. A [satin] is generated by..."
See also http://dx.doi.org/10.1016/j.compstruct.2010.11.014
and http://dx.doi.org/10.1016/j.compstruct.2010.11.016

how to find theoritically stress along thickness direction

hi

      A composite 3D plate is subjected to tensile load and whilethe otherend is fully comnstrained. how to findstress along the thickness for theoritically

Post-doctoral Position in the Ohio State University

Post-doctoral position is available in the area of ultrasonic material characterization and nondestructive evaluation (strong background and experience in ultrasonic experiment and modeling are required). The position is supported from research grants. The focus area is ultrasonic study of nonhomogenous materials like polycrystalline materials, composites and adhesive bonds. State of the art ultrasonic laboratories and other characterization facilities are available. More details will be provided to interested individuals.

Tech Brief: Composite Winglet Optimization for Reliability and Robustness

A new tech brief was recently released on composite optimization. See below for additional information:  

Composite materials offer the potential for structures of lighter weight than their metallic counterparts. The stiffness and strength of a laminated composite structure depends directly on the ply stacking sequence. A design process that includes the effects of manufacturing tolerances and variability in lamina properties will allow for a more reliable and robust structure.

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