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Relationship between Hardness and Elastic modulus?

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hardness

What is the relationship between hardness and elastic modulus? The higher hardness, the higher elastic modulus?  My understanding is that hardness is a local mechanical property, and 
elastic modulus is an averaged global mechanical property.  Am I right about this? 

Pre-stress & Initial stress

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Hi AllI am working on Simulation of nonlinear phenomena in MEMS devices. I do not know for residual stress in Microcantilever beam I should use pre stress or initial stress. I checked initial stress by Shell 181 and solid 186, but answers are for from experiments (around 100 times). I do not know what the difference between initial stress and pre stress is.

 

 

Free Online Access to latest Mathematics and Mechanics research until November 30, 2007

Submitted by ndmccrae on
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As a courtesy to mechanical professionals and academics at large, I would like to inform you about the current free access period to mechanical research including the following journals:

Journal of Damage Mechanics

Mathematics and Mechanics of Solids

From now until November 30, 2007, you can access any materials science, mechanics or engineering journals online (from volume 1, issue 1 to current) free of charge!

Changing element status in ANSYS

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failure analysis

Respected sirs/madams

I am working on failure analysis of concrete. I am trying to simulate in ANSYS, I heard about element birth/death option for changing the status of element during analysis. My doubt is whether I can use this element birth/death option for analysis or this is only used as a postprocessing tool.

 I am trying is to reduce the stiffness of the elements whose maximum principal stress reaches the ultimate strength of concrete and than further apply load in the susequent load step on the finite element model whose elements are removed.

Research on meshless methods and comparison between these methods

Submitted by sadook on
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Hello everybody,

I am doing a research on meshless methods  and I want to know about these methods, the difference between these methods and the method the most used and if it is possible, I want to get some codes of these methods.

Thank you,

Cordially, 

Sadok BLANCO,

Tunisia Polytechnic School,

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