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LS DYNA-Structural Mechanics

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I am trying to simulate a seismic earthquake analysis in order to study collapse pattern on LS DYNA.

I have build the keyword from scratch.Although, I am new to LS Dyna, I have never performed such a simulation, I have build a test model consisting of 2 columns joined by a beam resting on a finite element representing soil.

Call for White Papers - Adaptive Biomimetic Aircraft Structures

Research opportunity in Adaptive Biomimetic Aircraft Structures, Solicitation Number: W911W6-17-R-0018 @ www.fbo.gov Response Date: Jul 14, 2017 2:00 pm Eastern

kourousis's picture

SLM Ti-6Al-4V Plastic Anisotropy

Cyclic Plasticity and Microstructure of As-built SLM Ti-6Al-4V: The Effect of Build Orientation

D. Agius, K.I. Kourousis, C. Wallbrink, T. Song

Materials Science & Engineering: A (2017) -- Free access to the full article available at: https://authors.elsevier.com/a/1VHXL_Ky~FZJ6H

marco.paggi's picture

Reaction diffusion problems in mechanics

For those interested in this topic, we are organizing a minisymposium at the European Solid Mechanics Conference (sponsored by EUROMECH) in Bologna, in 2018, see session 9.2:

http://www.esmc2018.org/drupal8/node/9

Some examples are:

Reaction diffusion and Brinkman flow to model chemical reactions and the motion of a contaminated viscous fluid:

Sundaraelangovan selvam's picture

What is the physical meaning of Green-Lagrangian strain and Eulerian-Almansi strain measures?

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Hello, researchers. I have difficulty in understanding the physical meaning of Green-Lagrangian strain (E) and Eulerian-Almansi strain (A) measures. Mathematically speaking, I can derive the equations of these strains in different ways. But physically speaking, it's a bit harder to understand how these strains (E and A) can be pictured and how to give a proper physical definition for them. In a simple case, considering a uni-axial bar (Please refer the attached file), Engineering strain can be understood easily, but in E and A equations, from where do the squares of the lengths originate?

marco.paggi's picture

Latest progresses on the phase field model for brittle fracture

Dear Fracture mechanician,

In my group we published 2 articles with novelties on the phase field model for brittle fracture:

 

Emilio Martínez Pañeda's picture

A cohesive zone framework for environmentally assisted fatigue (code included)

I hope some of you find this work interesting, the code with the cohesive zone model for fatigue can be downloaded as a user element (UEL) subroutine for Abaqus from empaneda.com/codes

A cohesive zone framework for environmentally assisted fatigue

Susana del Busto, Covadonga Betegón, Emilio Martínez Pañeda

Engineering Fracture Mechanics (2017)

http://www.sciencedirect.com/science/article/pii/S001379441730098X

Rui Xiao's picture

Recent Work "Modeling the Energy Storage and Structural Evolution during Finite Viscoplastic Deformation of Glassy Polymers"

The enthalpic response of amorphous polymers depends strongly on their thermal and deformation history. Annealing just below the glass transition temperature (Tg) causes a large endothermic overshoot of the isobaric heat capacity at Tg as measured by differential scanning calorimetry, while plastic deformation (cold work) can erase this overshoot and create an exothermic undershoot. This indicates that a strong coupling exists between the polymer structure, thermal response and mechanical deformation.

Teng Li's picture

CiteScore 2016 indicates soaring impact of Extreme Mechanics Letters

CiteScore is an impact factor based on a 3-year citation window, calculated using data from the Scopus database. CiteScore is free to use, comprehensive and transparent.

Frank Richter's picture

Bone remodeling: Komarova model

Dear Community,

I make a code public for bone remodeling, using the Komarova model. It was developed by me alone. I provide the code as is, without warranty.

The agreement between my data and the ones from a reference are very good for fixed loading, but deviate for a more intricate loading. Lacking access to Abaqus with a Fortran compiler, I am at present unable to pinpoint the cause for the discrepancy between my data and data from the reference. The code can serve as a starting point and I give directions how to identify the cause for that discrepancy.

stefanogonella's picture

PhD positions in mechanics of advanced materials at the University of Minnesota

PhD positions in the broad area of mechanics of advanced materials and metamaterials are available in the group of Prof. Stefano Gonella (http://personal.cege.umn.edu/~gonella/) at the University of Minnesota.

Current topics of interest include: 1) Nonlinear metamaterials, including soft architected lattices; 2) Topological and non-reciprocal metamaterials; 3) Tunable and programmable multifunctional materials and structures.

mohsenzaeem's picture

Investigating phase formations in cast AlFeCoNiCu high entropy alloys by combination of computational modeling and experiments

Selection and thermal stability of phases are important in design of high entropy alloys (HEA). In this study, phase formations in cast AlFeCoNiCu HEA were investigated. Ab-initio molecular dynamics (AIMD) simulations were used to determine crystal structures of phases at different temperatures in equiatomic composition of AlFeCoNiCu. The AIMD results showed a possible coexistence of a face-centered cubic (fcc) phase and a bodycentered cubic (bcc) phase at the room temperature and indicated stabilization of a single fcc phase above 1070 K at the equiatomic composition of AlFeCoNiCu.

Regarding implementation of an integration scheme which avoids the need of contact surface segmentation.

Dear All,

As FEA is one of the most popular methods for the treatment of contact problems. In that, the overall contact surface is discretized a number of segments and contact integrals are evaluated in a segment-wise manner. In 2005 Fischer and Wriggers [1] presented an integration method which avoids the need of contact surface segmentations and enables the evaluation of contact integrals directly at the slave nodes of contact bodies. 

A ``small'' but interesting riddle from the theory of vibrations

A ``small'' but interesting riddle from the basic theory of vibrations. Haven't run into it in any physics/classical mechanics text/reference.

TalCohenMIT's picture

Postdoc positions in Nonlinear Solid Mechanics, MIT

I am in search of two postdocs to join my group, at MIT, on September 1st , 2017, or earlier. These positions will provide a unique flexibility in choice of research topic which will, in general, target problems in nonlinear solid mechanics. See our group website (http://tal-cohen.wixsite.com/website) for more information on our present research thrusts. Though our primary focus is on theoretical mechanics, candidates with experimental and computational experience are also encouraged to apply.

Best journals in the field of welding

Please introduce the best journals and conferences in the field of welding. 

Thank you in advance

 

Mab

3D-printing biomimetic structures to reveal the mechanics of natural systems

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Michael M Porter 

Natural Engineering Lab, Department of Mechanical Engineering, Clemson University; Zucker Graduate Education Center, N. Charleston, SC, 29405

saberelarem's picture

On a systematic approach for cracked rotating shaft study: breathing mechanism, dynamics and instability

We present a systematic approach to deal with the modelling and analysis of the cracked rotating shafts behaviour. We begin by revisiting the problem of modelling the breathing mechanism of the crack.

Here we consider an original approach based on the form we give to the energy of the system and then identify the mechanism parameters using 3D computations with unilateral contact conditions on the crack lips.

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