Dear Colleagues,
with this message, I would like to advertise 2 post-doctoral research positions at the intersection of electrochemistry and mechanics of materials in my lab at Northwestern University. The two post-doctoral projects will specifically focus on the influence of electrodepositions on the structure, properties, and behavior of soils (project 1) and concrete (project 2).
Bridge failures underscore the importance of rigorous material testing. The collapse of the incomplete pedestrian bridge at Florida International University on March 2018 is an example where design errors led to growing cracks as described by OSHA.
Although material failure is not the sole reason for bridge failures, it is a crucial step for selecting the right materials, bridge design analysis, and construction testing.
The main aim of this project is to develop a robust computational framework for investigating the hydro-chemo-mechanical aspect of concrete carbonation at meso-scale.
Concrete is one of the most widely used materials around the world. The construction industry is often involved in a wide array of testing which requires a variety of testing equipment. In addition to simple compression testing, testing standards such as ASTM C39, ASTM C109, ASTM C469, ASTM C1609 are among the test methods that can be followed to measure the mechanical properties of a concrete specimen. This blog post covers the mechanical testing of concrete in lab environments, its automation, and ways of achieving it.
Mechanical Testing of Concrete
In contrast to many numerical methods, the eigenerosion approach yields a convenient description of fracture handled in the postprocessing part of a Finite Element Analysis (FEA). Its fully energetic formulation avoids the introduction of extra degrees of freedom to model fracture propagation. Following previous works on eigenerosion, in this publication, a modified formulation of eigenfracture it is introduced, where it is distinguished between compression and tension loaded state. This formulation has the advantage that it relates the crack propagation process only to tensile loading.
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.
Could be of interest for some of you.
http://io9.com/how-the-ancient-romans-made-better-concrete-than-we-do-1…
Kind regards,
Thomas Laverne
Simulation and Modeling Engineer
Schlumberger
How obtain tension strain concrete(σt0) in damaged plasticity model in ABAQUS?
hello engineers
i need help about concrete damaged plasticity
fo example :
if Compressive stress (Fu)= 51.2 MPa
and tension stress (σ t)=0.3 x 51.2^(2/3)=4.136
1)why (σ t) is 2.36 in picture(uploaded)?
2)what is tension strain ? and how? i cant understand.
i cant obtain εt = total tensile strain.
how obtain εcr ?
please help
CONCREEP-10, the 10th Conference on Mechanics and Physics of Creep, Shrinkage and Durability of Concrete and Concrete Structures, will be organized by the Vienna University of Technology (TU Wien) in cooperation with the Engineering Mechanics Institute of ASCE (EMI). The conference will be held on September 21-23, 2015 at the Vienna University of Technology in Vienna, Austria. It will be chaired by Prof. Christian Hellmich, Prof. Johann Kollegger, and Prof. Bernhard Pichler, all of TU Wien.
Dear all,
We recently publsihed a study on modeling rapid chloride migration in concrete using the lattice modeling approach. Registered subscribers can view the article at:
http://www.sciencedirect.com/science/article/pii/S0008884614000799
We appreciate any comments or suggestions.
Regards
