Browsing by Subject "compression test"

Now showing 1 - 4 of 4

Access status: Open Access ,
Analiza anizotropii właściwości mechanicznych stopu magnezu typu WE43
(Wydawnictwa AGH, 2023) Dudziński, Michał; Waląg, Michał; Kula, Anna
The article presents experimental work on the anisotropy aspects of the mechanical properties of WE43 alloy and technically pure magnesium (99.95%) obtained by hot extrusion. The experimental work includes structural and phase characterisation of as-extruded materials and uniaxial compression tests conducted parallel and perpendicular to the extrusion direction. Complementary studies of the macrotexture of materials before and after plastic deformation were carried out. Based on received results the degree of anisotropy of the mechanical properties of the tested materials was determined. The texture was identified as an important factor determining the activation of particular deformation mode of the materials after extrusion. Keywords: WE43 alloy, anisotropy, texture, compression test, microstructure
Access status: Open Access ,
Bending and compression properties of ABS and PET structural materials printed using FDM technology
(AGH University of Science and Technology Press, 2017) Szczepanik, Stefan; Bednarczyk, Piotr
The bend and compression mechanical properties of 3D-printed polyethylene terephthalate (PET) and acrylonitrile butadiene styrene (ABS) rectangular and cylindrical specimens (fully-dense and with circular, hexagonal, and rectangular perforations) are presented. In three-point bending, fully-dense PET flexural strength was 69 MPa, yield stress was 48.9 MPa, and yield stress from compression was 31.4 MPa. For ABS, these values were 59, 41.7, and 51.2 MPa, respectively - not significantly different from those of polymers manufactured by common techniques. Whereas perforation reduced density, the strength values were significantly lower, decreased for the circular perforation to a value of 20% strength for the fully-dense specimen. Specific strengths dropped quite significantly for the specimens tested in bending, whereas they did not differ significantly when tested by compression.
Access status: Open Access ,
Conversion of compression test data into flow curve, accounting for barrelling
(Wydawnictwa AGH, 2021) Khoddam, Shahin; Hodgson, Peter D.
Current solutions to convert the axis-symmetric compression test (ACT) data to flow data ignore the barrelling deformation in the sample. This work presents a solution for the test which accounts for the sample's barrelling by discretising it into a finite number of layers of different radii. The solution assumes a constant and sliding friction at the anvil-sample interface. The sample's flow behaviour is identified by combining a recent kinematic solution of the test, Prandtl-Reuss-Mises's equations and a slab-analysis of the layers. It also involves an averaging of the effective plastic stresses developed in the individual layers. The solution is verified for a special case of no-barrelling which matches the currently used solution.
Access status: Open Access ,
The influence of SiC particle size on mechanical properties of aluminium matrix composites
(2017) Wąsik, Anna; Leszczyńska-Madej, Beata Katarzyna; Madej, Marcin
The main aim of this study was to determine the influence of SiC particle size on the mechanical properties of aluminum matrix composites. The reinforcing phase was introduced into the aluminum matrix in two different particle sizes: a coarse fraction with particle size ranging from 40 to 60 µm, and a fine fraction with particle size of less than 2 µm. The SiC particles were added in various quantities equal to 2.5, 5, 7.5, and 10 wt% in order to determine the influence of different contents of the reinforcing phase on the density, hardness, and compressive strength of the obtained composite materials. By using scanning electron microscopy (SEM), the microstructure observations were performed and allowed for defining the influence of matrix/reinforcement particle size ratio (PSR) on the distribution of reinforcement particles in the matrix. The Al-SiC composites were prepared through the conventional powder metallurgy technique, including compaction under a pressure of 300 MPa and a sintering process in a nitrogen atmosphere at 600°C. Applying the reinforcing phase with the particle size (40–60 µm) similar to matrix (<63 µm) allowed us to obtain a more-uniform distribution of SiC particles in the matrix than after introducing the fine fraction of reinforcement (2 µm). The mechanical properties of the Al-SiC composites increased with increases in the weight fraction of the reinforcing phase, wherein this effect is more visible for composites reinforced with SiC particles of finer gradation.