Zobrazeno 1 - 10
of 215
pro vyhledávání: '"Jacek Tejchman"'
Publikováno v:
Frontiers in Materials, Vol 7 (2020)
A disordered and heterogeneous, quasi-brittle granular material can withstand certain levels of internal damage before global failure. This robustness depends not just on the bond strengths but also on the topology and redundancy of the bonded contac
Externí odkaz:
https://doaj.org/article/c2eb5bdd924540458f704d55f96c8338
Autor:
Jacek Tejchman
Publikováno v:
KONA Powder and Particle Journal, Vol 20, Iss 0, Pp 125-132 (2014)
The effects of wall inclinations and wall imperfections at the onset of granular flow in a silo are numerically studied. The calculations were carried out for the onset of quasi-static mass flow in a silo with a controlled outlet velocity along the e
Externí odkaz:
https://doaj.org/article/d234e55e48cd417583416df59e42016f
Autor:
JAN KOZICKI, JACEK TEJCHMAN
Publikováno v:
TASK Quarterly, Vol 9, Iss 1 (2005)
A simplified cellular automaton was used to calculate the kinematics of non-cohesive granular materials during confined flow in silos. In this model, granular flow was assumed to be an upward propagation of holes through a lattice composed of cells r
Externí odkaz:
https://doaj.org/article/f595dd4bffa742b79415441ebe174e52
Autor:
JAN KOZICKI, JACEK TEJCHMAN
Publikováno v:
TASK Quarterly, Vol 9, Iss 1 (2005)
An improved cellular automaton has been used to calculate the kinematics of noncohesive granular materials during confined flow in mass and funnel flow model silos. In this model, based on a gas model of hydrodynamics, collisions and dissipation of p
Externí odkaz:
https://doaj.org/article/f88101acfb5e4a3aabb14faa08c01df7
Autor:
JACEK TEJCHMAN
Publikováno v:
TASK Quarterly, Vol 7, Iss 4 (2003)
The paper deals with numerical modelling of confined flow of granular materials in vertical bins. Quasi-static mass flow of non cohesive sand with a controlled outlet velocity along the entire silo bottom was numerically studied using a finite elemen
Externí odkaz:
https://doaj.org/article/1160d9342de548d79a55bcc5e9c8444b
Publikováno v:
TASK Quarterly, Vol 7, Iss 4 (2003)
The paper deals with experimental and theoretical research of resonance effects during silo emptying. The influence of resonance effects on wall pressures in silos has been investigated with model tests and FE analyses. The model tests were carried o
Externí odkaz:
https://doaj.org/article/90c8d52c5b674867ad20bacdd3d6c0b1
Autor:
JACEK TEJCHMAN
Publikováno v:
TASK Quarterly, Vol 7, Iss 4 (2003)
Externí odkaz:
https://doaj.org/article/b48d03703a5e4253850db9bfa7073df8
Autor:
TOMASZ MAJEWSKI, JACEK TEJCHMAN
Publikováno v:
TASK Quarterly, Vol 6, Iss 3 (2002)
Paper presents results of numerical modelling of behaviour of plane strain reinforced concrete elements under eccentric compression. In the analysis, a finite element method was used based on an elasto-plastic constitutive law by Drucker-Prager with
Externí odkaz:
https://doaj.org/article/0a4e37b4cd404a0fbed258d2b5e7f144
Autor:
JAN KOZICKI, JACEK TEJCHMAN
Publikováno v:
TASK Quarterly, Vol 6, Iss 3 (2002)
Paper presents the results of simulations of granular flow with a cellular automata model. Flow of granular material behind a moving retaining wall and in a silo with inserts was numerically analysed. Two different migration schemes during flow were
Externí odkaz:
https://doaj.org/article/ea3d4baad87a45488d961c35afa7852b