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Cyclical Nanoindentation Stress-Strain Measurement

Submitted by NANOVEA on

The Stress-Strain curve obtained by Nanoindentation reveals the correlation of "Stress" and"Strain" of a given material under nano controlled loads. Unlike the traditional Tensile Testing method of obtaining Stress-Strain curve data, which gives data at a macro level, the Nanoindentation method provides vital Stress-Strain curve data at nano level scale without the large and intense machinery. The Stress-Strain curve of various materials will vary widely.

Design of viscometers corresponding to a universal molecular simulation method

Submitted by Kaushik Dayal on

This is the preprint of an article that has appeared in the Journal of Fluid Mechanics, 691:461-486, 2012 (doi:10.1017/jfm.2011.483)

Design of viscometers corresponding to a universal molecular simulation method

by Kaushik Dayal (Carnegie Mellon) and Richard D. James (Minnesota)

 

Abstract:

Inverse problem in beam bending, elastic-ideally plastic material

Submitted by Frank Richter on

Dear iMechanica,





suppose you have a beam with a square cross-section, manufactured from an elastic-ideally plastic material.



Now apply a load that rises linearly in time, but is locally constant along the beam length. Upon sagging, the beam will develop a plastic zone beginning in the top and surface regions at mid-length.

This is the "straight" problem solved in Prager, Hodge: Theory of perfectly plastic solids, publisher: Springer



Delamination and Cohesive zone model

Submitted by Anonymous (not verified) on

 

I want to work on delamination and cohesive zone model. I would also like to model this in Abaqus. I’ve read the material available there but it’s not adequate. I would like to know the concepts and fundamentals of the cohesive zone model and its implementation. Can anyone explain this? Please suggest some good literature/books on this for beginners.

Praveen.