REGULATIONS OF ROUGHNESS PARAMETERS FOR MACHINERY FUNCTIONAL SURFACES IN TECHNOLOGICAL DOCUMENTATION

Relevant Roughness Parameters in Polishing Operations of Previously Milled Surfaces

For time and cost saving reasons, the lowest surface roughness possible is sought in milling operations. High speed milling is recommended in order to minimise the amount of material to be removed in subsequent finishing operations, e.g. grinding, electrical discharge machining or manual polishing. Several roughness parameters are usually employed for the characterization of polished surfaces. ...

Roughness of sandpile surfaces.

We study the surface roughness of prototype models displaying self-organized criticality (SOC) and their noncritical variants in one dimension. For SOC systems, we find that two seemingly equivalent definitions of surface roughness yield different asymptotic scaling exponents. Using approximate analytical arguments and extensive numerical studies we conclude that this ambiguity is due to the sp...

Roughness of fracture surfaces

We study the fracture surface of three dimensional samples through a model for quasi-static fractures known as Born Model. In particular, we consider the roughness of this fracture surface. We find for the roughness exponent a value ζ = 0.5 expected for “small length scales” in microfracturing experiments. Since this corresponds to a slow evolution for the fracture, our simulations confirm that...

Physical and Functional Documentation of the Historical Olfat House

The architecture of residential spaces in Isfahan has put forward treasured examples to the world of art and architecture through history. House is one of the most important forms of the social organization of space in which numerous factors have been influential in its construction just like many other human-made complexes. Due to the changes in the recent century, historical houses are severe...

The Stringency Of Environmental Regulations And Technological Change: A Specific Test Of The Porter Hypothesis