Tomáš Doktor
YOU?
Author Swipe
View article: Dynamic characterisation of novel three-dimensional axisymmetric chiral auxetic structure
Dynamic characterisation of novel three-dimensional axisymmetric chiral auxetic structure Open
The study presents an extensive mechanical and computational characterisation of novel cellular metamaterial with axisymmetric chiral structure (ACS) at different strain rates. The Direct Impact Hopkinson Bar (DIHB) testing device was used…
View article: Effect of polymeric fillers on Poisson's function in additively manufactured auxetics
Effect of polymeric fillers on Poisson's function in additively manufactured auxetics Open
In this study, the relation between the presence of the filler in different types of open auxetic lattices and their Poisson's functions was investigated using optical strain measurement technique and Digital Image Correlation (DIC) algori…
View article: Dynamic penetration of cellular solids: Experimental investigation using Hopkinson bar and computed tomography
Dynamic penetration of cellular solids: Experimental investigation using Hopkinson bar and computed tomography Open
Light-weight cellular solids, such as aluminium foams, are promising materials for use in ballistic impact mitigation applications for their high specific deformation energy absorption capabilities. In this study, three different types of …
View article: HIGH STRAIN-RATE COMPRESSIVE TESTING OF FILLING MATERIALS FOR INTER-PENETRATING PHASE COMPOSITES
HIGH STRAIN-RATE COMPRESSIVE TESTING OF FILLING MATERIALS FOR INTER-PENETRATING PHASE COMPOSITES Open
In this study behavior of the selected types of filling material for the inter-penetrating phase composites was tested in compressive loading mode at low and high strain-rates. Three types of the filling material were tested, (i) ordnance …
View article: COMPRESSIVE PROPERTIES OF AUXETIC STRUCTURES WITH CONTROLLED STIFFNESS OF STRUT JOINTS
COMPRESSIVE PROPERTIES OF AUXETIC STRUCTURES WITH CONTROLLED STIFFNESS OF STRUT JOINTS Open
Presented paper deals with experimental study on compressive properties of auxetics with controlled stiffness of strut joints. The variable strut joints properties were simulated by adding extra amount of material in the struts’ intersecti…
View article: Book of Abstracts. XVIIth Youth Symposium on Experimental Solid Mechanics
Book of Abstracts. XVIIth Youth Symposium on Experimental Solid Mechanics Open
The work illustrates how building parameters of the Additive Manufacturing (AM) process fused filament
\nfabrication can affect not only the mechanical properties [1] but also the surface wettability and morphology.
\nWettability and morph…
View article: IMPACT TESTING OF ORDNANCE GELATINE UNDER MODERATE STRAIN RATE CONDITIONS
IMPACT TESTING OF ORDNANCE GELATINE UNDER MODERATE STRAIN RATE CONDITIONS Open
An experimental study on energy absorption capabilities and strain rate sensitivity of ordnance gelatine was performed. Strain energy density under quasi static compression and moderate strain rate impact tests was compared. In the study t…
View article: INFLUENCE OF PRINTING AND LOADING DIRECTION ON MECHANICAL RESPONSE IN 3D PRINTED MODELS OF HUMAN TRABECULAR BONE
INFLUENCE OF PRINTING AND LOADING DIRECTION ON MECHANICAL RESPONSE IN 3D PRINTED MODELS OF HUMAN TRABECULAR BONE Open
The paper deals with investigation on directional variations of mechanical response in 3D printed models of human trabecular bone. Sample of trabecular bone tissue was resected from human donor and 3D model was obtained by X-ray computed t…
View article: UTILIZATION OF IMAGE AND SIGNAL PROCESSING TECHNIQUES FOR ASSESSMENT OF BUILT HERITAGE CONDITION
UTILIZATION OF IMAGE AND SIGNAL PROCESSING TECHNIQUES FOR ASSESSMENT OF BUILT HERITAGE CONDITION Open
Historical buildings represent invaluable heritage from the past and therefore their protection is a very important task. Assessment of their condition must not cause damage accumulation, thus the least possible volume removed from the str…
View article: Testing of Auxetic Materials Using Hopkinson Bar and Digital Image Correlation
Testing of Auxetic Materials Using Hopkinson Bar and Digital Image Correlation Open
In this paper, a split Hopkinson pressure bar (SHPB) was used for impact loading of an auxetic lattice (structure with negative Poisson’s ratio) at a given strain-rate. High strength aluminum and polymethyl methacrylate bars instrumented w…
View article: Impact Testing of Polymer‐filled Auxetics Using Split Hopkinson Pressure Bar
Impact Testing of Polymer‐filled Auxetics Using Split Hopkinson Pressure Bar Open
In this paper, impact testing of auxetic structures filled with strain rate sensitive material is presented. Two dimensional missing rib, 2D re‐entrant honeycomb, and 3D re‐entrant honeycomb lattices are investigated. Structures are divide…
View article: SEMI–AUTOMATED ASSESSMENT OF MICROMECHANICAL PROPERTIES OF THE METAL FOAMS ON THE CELL-WALL LEVEL
SEMI–AUTOMATED ASSESSMENT OF MICROMECHANICAL PROPERTIES OF THE METAL FOAMS ON THE CELL-WALL LEVEL Open
Metal foams are innovative porous material used for wide range of application such as deformation energy or sound absorption, filter material, or microbiological incubation carrier. To predict mechanical properties of the metal foam is nec…
View article: Compressive properties of auxetic structures produced with direct 3D printing
Compressive properties of auxetic structures produced with direct 3D printing Open
In the presented paper, three types of auxetic structures were produced with direct 3D printing and their compressive mechanical properties were tested.Samples were prepared from acrylic material suitable for high-resolution direct printin…
View article: Deformation behaviour of a natural-shaped bone scaffold
Deformation behaviour of a natural-shaped bone scaffold Open
The study aims at mechanical testing of an artificial bone structure in the form of a scaffold for the application in the repairs of trabecular bones after wounds or degenerative diseases.Such artificial construct has to conform to many re…
View article: Properties of polymer-filled aluminium foams under moderate strain-rate loading conditions
Properties of polymer-filled aluminium foams under moderate strain-rate loading conditions Open
This paper deals with an experimental study of deformation response of open-cell aluminium foams under a moderate strain-rate compressive loading.Generally, porous metals show a promising potential in energy-absorption applications.However…
View article: Determination of elastic-plastic properties of Alporas foam at the cell-wall level using microscale-cantilever bending tests
Determination of elastic-plastic properties of Alporas foam at the cell-wall level using microscale-cantilever bending tests Open
The presented paper is focused on determining the mechanical properties of the Alporas closed-cell aluminium foam.To utilise the favourable properties of cellular metals (e.g., high strength-weight ratio, energy absorption or insulation ca…