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Showing 1 to 20 of 106 for “"High Strain Rate"”.
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High strain rate properties of structural aluminium.
… been used in the past to determine the stress-strain relationship of metals and alloys at high strain rates of up to 2.2 x 10 per second; some of these were approximate whilst others required expensive equipment. In the present study three aluminium alloys, HE15, HE30TF and DTD5044 have been …
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High Strain Rate Properties of Geological Materials
… Model, or HSBM. For this model to be accurate and relevant to the mining process it is essential to have dynamic data on the various rock types concerned. This was the purpose of the current project. As the material data are destined for use in a computer modelling programme it was …
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High Strain-Rate Responses of Mechanical Metamaterials
… regime are not fully understood, especially at strain rates above 10^3 s^−1. Using microscale uniaxial compression and custom microscale Kolsky bar capabilities, we uncover the strain rate dependence of mechanical metamaterials over eight orders of magnitude, ranging from strain rates of 10^−3 …
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A system for high strain rate interruptible tensile tests
… used for measuring a material's response to high strain rates. High strain rate data is critical for exhaustive characterisation, due to the sensitivity of materials to the rate at which they are strained. The principle limitation of conventional SHPB is that there is limited control of the …
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Characterization of UHMWPE Laminates for High Strain Rate Applications
… effort to characterize the properties of ultra-high molecular weight polyethylene (UHMWPE). As a composite of polymers, the properties of UHMWPE are time-dependent. It is desired by research sponsors to know the properties of the material at high strain rates, in order to simulate the use of …
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High strain rate properties of materials using Hopkinson bar techniques
This dissertation examines the high strain rate mechanical properties of polymers, polymer bonded explosives and solders. In addition, it examines experimental developments that will allow more detailed investigation of these properties in the future. The split Hopkinson pressure bar is a standard …
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Microstructural development during high strain-rate forging of Ti-6Al-4V
Includes bibliographical references.
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Shock-wave and high strain-rate phenomena in matter: modeling and applications
… of the material response in case of high strain-rate, impact or shock loading is fundamental in several applications, such as e.g. ballistic, nuclear and military fields. The objective of the investigation of wave propagation in solids is the development of reliable methods for the …
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Low to high strain rate deformation of amorphous polymers : experiments and modeling
… and poly(methvl methacrylate)--at strain rates ranging from 10⁻⁴ to 10⁴ s⁻¹. This spectrum of strain rates was achieved in tension/compression tests using a dynamic mechanical analyzer (DMA), a servo-hydraulic testing machine and a split-Hopkinson pressure bar. Tension tests on the …
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ULTRA-HIGH STRAIN RATE CONSTITUTIVE MODELING OF PURE TITANIUM USING PARTICLE IMPACT TEST
With the advent of advanced testing strategies like laser-induced particle impact test, it is possible to study materials mechanics under extremely high deformation rates, i.e., above 10^6 s^-1, a relatively less explored regime of strain rates. In this study, we accelerate microparticles of …
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Dynamic mechanical behavior of frozen Ottawa sand subjected to high strain rate loading
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2027-08-01
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Modeling the High Strain Rate Tensile Response and Shear Failure of Thermoplastic Composites
The high strain rate fiber direction tensile response of Ultra High Molecular Weight Polyethylene (UHMWPE) composites is of interest in applications where impact damage may occur. This response varies substantially with strain rate. However, physical testing of these composites is difficult at …
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Dynamic response of glass under low-velocity impact and high strain-rate compression loading
… types, and Starphire and Borosilicate demonstrated the highest total energy absorption. High strain-rate SHPB compression tests were carried out on cylindrical glass samples at two different strain-rates. Borosilicate shohigher compressive strength and energy absorption in comparison to the …
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Implementation of material models for high strain rate applications as user-subroutines in abaqus/explicit
… These material models are suitable for high strain, high strain rate and high temperature applications. The implementation of the material models was verified by comparing simulation results obtained using the Abaqus version of the Johnson-Cook material model with the simulation results …
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High strain rate mechanical characterization of trabecular bone utilizing the split-Hopkinson pressure bar technique
… as metals, plastics, and even stiff foams at strain rates of up to 105 sec-1. Historically, however, numerous obstacles have stood in the way of applying this technique to softer biological tissues. This study is aimed at bridging this gap by employing various innovations in the field of …
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High-Velocity Microparticle Impact for Analytical Modelling of High-Strain-Rate Mechanics and Material Behavior
… optical technique for conducting and observing high-velocity micron-scale impacts against various materials is the focus of this work. This technique, the laser-induced particle impact test (LIPIT), is capable of accelerating microparticles to supersonic velocities to achieve strain-rates up to …
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Design of fixtures and specimens for high strain-rate tensile testing on a drop tower
… towers are used to perform mechanical tests at strain rates similar to those experienced in automobile crashes. By their nature, drop towers are configured to perform compression tests only. This project aims to design a set of fixtures and specimens to allow the machine to perform tensile …
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Development and proving of a split Hopkinson pressure bar used for high strain rate materials testing
… is necessary to determine material properties at high strain rates. Conventional screw-driven or servo-hydraulic methods of testing materials at high strain rates are not adequate as oscillations and stress waves are set-up within the testing apparatus. These oscillations and stress waves foul the …
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