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DC Field | Value | Language |
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dc.contributor.advisor | Kardos, G. | - |
dc.contributor.author | Burke, Michael Anthony | - |
dc.date.accessioned | 2015-06-09T21:47:53Z | - |
dc.date.available | 2015-06-09T21:47:53Z | - |
dc.date.issued | 1970-05 | - |
dc.identifier.uri | http://hdl.handle.net/11375/17496 | - |
dc.description.abstract | <p> Multiple impact tests were performed on mild steel. The pulse durations ranged from 15 to 250 milliseconds. Peak stresses extending to 135,000 p.s.i. were attained. </p> <p> A dynamic model, based on dislocation dynamics, was derived for polycrystalline metals and made specific to mild steel. The model provided a means of indirectly determining the dislocation velocity-stress exponent 𝑛 by experiment. </p> <p> An empirical flow function was evaluated which related dynamic load conditions to plastic deformation. This function is a further extension of the dynamic model. Several dislocation parameters are grouped together to pennit experimental evaluation of the strain rate effect on crystalline material. </p> <p> Experimental studies indicated that a given strain: </p> <p> 1) if produced by a single pulse, can be estimated by evaluation of the flow function for that load-time trace, or, </p> <p> 2) if produced by multiple impacts, can be estimated by the cumulative flow function, a summation of the flow functions for all impact traces. </p> <p> The multiple impact tests established the flow function as an equation of state. The plastic deformation could then be determined for a given dynamic load as long as the strain history is known. </p> <p> The theoretical model was used to support the experimental findings. </p> | en_US |
dc.language.iso | en | en_US |
dc.subject | mechanical engineering | en_US |
dc.subject | mild steel | en_US |
dc.subject | dynamic behaviour< | en_US |
dc.title | The Dynamic Behaviour of Mild Steel | en_US |
dc.contributor.department | Mechanical Engineering | en_US |
dc.description.degreetype | Thesis | en_US |
dc.description.degree | Master of Engineering (ME) | en_US |
Appears in Collections: | Open Access Dissertations and Theses |
Files in This Item:
File | Description | Size | Format | |
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Burke_Michael_A_1970May_MEng.pdf | 9.75 MB | Adobe PDF | View/Open |
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