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Showing 1 to 11 of 11 for “"Mechanical Shock"”.
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Cavitation in Vial Drop Subjected to Mechanical Shock
… The process by which this occurs is most likely shock induced cavitation. During this process, hot spots can be created with temperatures and pressures reaching thousands of Kelvin and hundreds of atmospheres, respectively, leading to degradation of protein therapeutics. This work will extend …
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Mechanical Shock Analysis and Testing of an Air-Dropped Antarctic Ice Penetrator
… can damage the delicate seismometer. SGIP uses shock isolation to reduce the seismometer's peak acceleration. A structural response model is used to predict the seismometer's dynamic response to ice shelf impacts with hundreds of potential shock isolation designs. This structural response model …
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Analysis and mitigation of mechanical shock effects on high speed planing boats
… in rough seas, exposes the occupants to severe mechanical shock exposure that has been linked to significant increase in the rates of acute and chronic injury. While many government and civilian organizations have researched various aspects of this problem over the past decade or more, no …
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Optimal deadrise hull analysis and design space study of naval special warfare high speed planning boats
… adverse conditions exposes personnel to severe mechanical shock. Anecdotal evidence and recent medical studies conducted by the Naval Health Research Center show a correlation between HSPB operation and chronic and acute personnel injury. Most current research focuses on short-term solutions …
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Elimination of PZT thin film breakage caused by electric current arcing and intrinsic differential strains during poling
… more susceptible to breakage if any sort of mechanical force is present. It was determined that these stresses were caused by differential strains due to incomplete metal layer coverage. Second, the electrical arcing that is frequently taking place during poling sends a mechanical shock wave …
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Design, Manufacture, Dynamic Testing, and Finite Element Analysis of a Composite 6u Cubesat
… Aerospace Engineering Department facilities. A mechanical shock test and random vibration test were performed using a shock table and a shake table respectively. Results of both tests are presented. A correlation between the Experimental data and the Finite Element Model of the satellite was …
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The Effects of Seizure Modeling and Polyphenols on Behavior in Bang-Sensitive Drosophila
… mutants model epileptic seizures following mechanical shock and provide a high-throughput alternative to costly rodent studies. The objectives of this study were to: 1) examine the effectiveness of seizure modeling in two Bang-Sensitive mutants strains [bang senseless (bss) and easily …
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Elucidation of the Role of miR-184 in the Development and Maintenance of the Drosophila Melanogaster Nervous System
… demonstrate hyperactive episodes in response to mechanical shock, indicative of increased susceptibility to seizures. Homozygous loss-of-function mutants also exhibit shortened lifespan, as well as reduced group longevity. Additionally, miR-184 deficient mutant larvae exhibit abnormal development …
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Knock phenomenon analysis on a diesel-CNG dual fuel engine using experimental fuel ratio
… engine cycle, which yields a non-periodic mechanical shock. The calculated coefficient of variation of the knock index (COVKI) shows that the severe knock occurred when the COVKI is 0.30 and above. It suggests that the knock phenomenon on a DDF engine occurs due to an abrupt heat release …
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Mechanochemistry of metal-organic frameworks under compression
… demonstrated the possibility to use MOFs for mechanical energy absorption via an internal volume collapse mechanism. In this dissertation, the mechanical and mechanochemical behaviors of MOFs under compression, especially their energy absorption during plastic deformation, are explored. The …
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The influence of degree of crystallinity on the thermal conductivity of nylon 66
… sea water and is capable of resisting repeated mechanical shock. The purpose of this investigation was to determine the extent to which the degree of crystallinity of nylon could be increased by cold-rolling and annealing, and the change :in thermal conductivity resulting from these treatments. …