Analytical dependencies to assess the rigidity of multi-profile screw flights during their manufacture by winding strip blanks with an edge on a mandrel were obtained, which made it possible determine profiles turns high and evaluate accuracy such blanks. The regularities deflection combined auger billet open closed windings in various ways its fixing process cold rib onto mandrels have been es...

The paper presents how application of agents can improve scalability of domain decomposition (DD) based parallel codes, where the optimal load balance for some components of the code cannot be achieved only by partitioning computational domain. The limitation of the DD paradigm, where some highly overloaded pieces of domain cannot be partitioned into smaller sub-domains can be effectively overc...

Multivariate hash functions are a type of hash functions whose compression function is explicitly defined as a sequence of multivariate equations. Olivier Billet etc. have designed the hash function MQ-HASH and Jintai Ding etc. also propose a similar construction, which the security depends on the difficulty of solving randomly drawn systems of multivariate equations over a finite field. Findin...

On a beautiful evening of April, 1943, I gave a talk on elementary psychology to a small party of R.A.M.C. orderlies and convalescent patients at a detached hospital at Gibraltar. But this simple talk led up to a series of events of which to-night is one. At the end of my short talk, an orderly rose and said: " Sir, will you tell us what night-nurse's paralysis is ? " I looked at him, thought, ...

A time-implicit discretization is derived and validated for the material-point method (MPM). The resulting non-linear, discrete equations are solved using Newton’s method combined with either the conjugate gradient method or the generalized minimum residual method. These Newton-Krylov solvers are implemented in a matrix-free fashion for numerical efficiency. A description of the algorithms and ...

The analysis of the formation process cast structure carbon steel grade ?? (???? ???? 4728:2014) after completion its crystallization with a change in wide range metal cooling rate during solidification continuously billet (??B) diameter 450 mm has been carried out. effect ??B Ø on parameters chemical heterogeneity distribution silicon and manganese microstructure shown. It determined that inve...

Extruded profiles/sections are increasingly used in the transport industry for lightweight structures. In this paper, a wide thin-ribbed aluminium profile with asymmetric Z-shape, was manufactured by novel sideways extrusion process proposed authors. A comparative study conducted utilising direct/forward at same temperature and speed, which different mechanics, resulting microstructures mechani...

The optimal material processing in steel industry is difficult because of the multi-constituent and multiphase character of the commercial steels, variety of the possible processing paths, and plant specific equipment characteristics. This paper shows implementation of the genetic programming approach for crack presence modeling after rolling. The data (110 samples covering 7 different steel gr...