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Plotting the Johnson-Cook strength model

Submitted by HS_impact on

I'm trying to plot the stress-strain curve described by the Johnson-Cook strength (and eventually damage) models. The strength model is defined as:

σ=[A+Bεn][1+C ln(ε_dot*)][1-T*m]

where A, B, C, n, and m are material constants, ε_dot* is the non-dimensionalized strain rate, and T* is the homologous temperature where T*=(T-T0)/(Tmelt-T0)

2011 Gordon Research Conference/Seminar on Adhesion Science

Submitted by Rong Long on

I would like to bring your attention to the Gordon Research Conference (GRC) on Adhesion Science, which will be held from July 24 – 29, 2011, at Bates College, Lewiston, Maine, U.S.A.  This conference is chaired by Chung-Yuen Hui at Cornell University and Kenneth Shull at Northwestern University.

non linear concrete analysis using load steps

Submitted by creativekishore on

Hi

I'm using ansys to model a 3D concrete beam model with reinforcement to conduct nonlinear static analysis.

Plz throw some light on how to use the load steps and restart options.

also do tell me on the steps /options for seeing the cracks that appear in the beam model.

 

Email:creative.kishore [at] gmail.com

An introduction to metamaterials and waves in composites

Submitted by Biswajit Banerjee on

My book on metamaterials, "An introduction to metamaterials and waves in composites" has been published on June 16, 2011 by CRC Press (Taylor and Francis).

The book is meant for students, researchers, engineers, and educators who want to get a basic grounding on the theory that is the basis of recent excitement about negative materials, cloaking, transformation optics/acoustics and other wave phenomena in composites.

Reliability and engineering mechanics

Submitted by Biswajit Banerjee on

The word "failure" can mean different things to different people.  Over the past couple of years, my interactions with various groups from industry has shown me that for some people failure means catastropic fracture/buckling while for others it can mean highly localized plastic yielding.  Even for relatively simple sandwich composite structures, there is no clearly agreed upon definition of the word.