Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 543 for “"strain rate"”.
-
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 …
-
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 …
-
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 …
-
Strain rate effects on inelastic response of beams
Thesis (M.S.)--Michigan State University. Dept. of Civil Engineering, 1965
-
Specimen size effects in slow strain-rate testing
… the effect of specimen dimensions in slow strain-rate environmental effects testing. Tension tests of free machining brass were conducted in a mercuric nitrate solution at a constant crosshead displacement rate of 10⁻³(inch/sec). Thirty-six smooth round bar specimens with different …
-
Investigation of strain rate sensitivity of polymer matrix composites
An investigation into high strain rate behaviour of polymer composites was performed by developing a finite element model for a fibre reinforced polymer (FRP) plates impacted at varying strain rates. The work was divided into three facets, firstly to characterize the FRP material at varying strain …
-
Development of an intermediate strain rate compression testing machine
… development of the wedge bar Intermediate Strain rate Tester (IST) presented by Cloete and Oxtoby [1] is presented in this dissertation. The concept uses a wedge mechanism to deform 5 mm diameter, 5 mm long specimens at strain rates in the region of 10 s, up to strains of 30. As impact …
-
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 …
-
Characterization of UHMWPE Laminates for High Strain Rate Applications
… to know the properties of the material at high strain rates, in order to simulate the use of these materials in computer models. Properties believed to be significant which are investigated in this research are the tensile properties of lamina and laminates, and the interlaminar shear properties …
-
Multi-Component Characterization of Strain Rate Sensitivity in Pharmaceutical Materials
… plastically deforming materials tend to be more strain rate sensitive than brittle materials, but this sensitivity depends on how fast the material can respond to applied stresses. In addition, since many pharmaceutical materials also demonstrate relatively large amounts of elastic deformation, …
-
Strain rate and temperature dependent mechanical behavior of nanocrystalline gold
… behavior in the large range of operating strain rates and temperatures. This dissertation research studied (a) the role of thermally activated processes based on the strain rate and temperature dependent mechanical behavior of nanocrystalline Au thin films, and (b) deformation processes at …
-
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 …
-
Strain rate effects on the behavior of shape memory alloys
Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 2013.
-
Piezometry and Strain Rate Estimates Along Mid-Crustal Shear Zones
… the estimation of tectonic driving stresses and strain rates acting in the mid-crust. Quartz-rich tectonites from three exhumed mid-crustal shear zones, the Main Central Thrust (MCT; Sutlej valley, NW India), South Tibetan Detachment System (STDS; Rongbuk valley, S Tibet), and Moine thrust (NW …
-
Strain-rate Dependent Fracture Load Prediction of Lead-free Solder Joints
The critical strain energy release rate at crack initiation, Jci, has been shown to govern the fracture of short solder joints. The present work measured Jci for 2 mm long SAC305 solder joints as a function of the strain rate and phase angle using DCB specimens. A drop tester was designed and built …
-
Microstructural development during high strain-rate forging of Ti-6Al-4V
Includes bibliographical references.
-
Fatigue Crack Initiation as a Function of Temperature and Strain Rate
Made available in DSpace on 2014-12-12T00:25:56Z (GMT). No. of bitstreams: 1 7500438.pdf: 1914377 bytes, checksum: fd307c05d347ae8a2d053c0f9dc15893 (MD5) Previous issue date: 1974
-
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 …
Page 1 of 28