This study proposes a novel approach to surface strain measurement for cylindrical rock specimens subjected uniaxial compression using distributed fibre optic sensing technology. The capability and accuracy of this in measuring the full-field distribution specimen have been verified by series compressive strength (UCS) tests on aluminium alloy, sandstone, granite. By analysing experimental resu...

Abstract In this study, numerical simulations of uniaxial compression, biaxial and unloading were performed on granite specimens that contained different prefabricated defects. The microscopic parameters in models verified by the compression experiments intact standard cylindrical specimen square with influences from stress paths, shapes defects, numbers distribution defects strength, deformati...

Sputtering was utilized to deposit polycrystalline Cu and CrN films sequentially onto Si(100) substrates, forming specimen assemblies in which predominantly ⟨111⟩ oriented Cu thin films of varying thicknesses were confined between Si and CrN. Cylindrical micro-pillars of CrN/Cu/Si(100)were fabricated through focused ion beammilling,with the interfaces either normal to the axial direction or at ...

This paper presents the thermal analysis of cyclic compression experiments which were carried out on commercial PC and PMMA cylindrical specimens. The thermal problem is solved numerically (®nite element). Uniform internal heat generation is assessed from the experimental evolution of the hysteretic energy rate throughout the experiment. The results show a very good agreement between the calcul...

An existing coupon compression fixture was modified for testing cylindrical coupon samples of a pultruded material in compression. Then a new fixture was developed for testing full-sized structural shapes, which presents all the advantages of the coupon fixture. Particularly, splitting of the end of the sample is prevented while reducing the stress concentration factor at the ends, yielding com...

The strain rate effect of luffa sponge material is an indispensable property for it to be used for acoustic, vibration, and impact energy absorption. Compressive tests at different strain rates on cylindrical column specimens of luffa sponge material were conducted over a wide density ranging from 24 to 64 kg/m. A photographic technique was applied to measure the section area of the specimen wi...

For a proper analysis of cortical bone behaviour, it is essential to take into account both the elastic stiffness and the failure criteria. While ultrasound methods allow complete identification of the elastic orthotropic coefficients, tests used to characterise the various failure mechanisms and to identify the brittle tensile strength in all directions are currently inadequate. In the present...

High strain-rate compression experiments were performed with a split-Hopkinson pressure bar (SHPB) at 500–4000/s on cylindrical samples of a Zr-based bulk metallic glass (LM-1) in both the fully amorphous and annealed conditions. The effects of changes to the specimen geometry (i.e., L/D ratio) and the material heat treatment [i.e., annealing versus amorphous (as-received)], on the peak stress,...

The inelastic response of materials to applied uniaxial loading is typically measured using tensile or compressive specimens of initially circular cross-section. Under deformation, this cross-section may become elliptical due to anisotropic material behaviour. An optical technique for measuring the elliptical deformation of anisotropic, homogeneous cylindrical specimens undergoing uniaxial defo...

Visual data collection is paramount for the majority of scientific research. The added transparency of the zebrafish (Danio rerio) allows for a greater detail of complex biological research that accompanies seemingly simple observational tools. We developed a visual data analysis and collection approach that takes advantage of the cylindrical nature of the zebrafish allowing for an efficient an...