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The Global ETD Search service is a free service for researchers
to find electronic theses and dissertations. This service is
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Networked Digital Library of Theses and Dissertations.
Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
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Showing 41 to 50 of 1812 (0.043 seconds)Spelling suggestions: "subject:"1plastic"" "subject:"2plastic""
| 41 |
Propagation of elastic waves on thin-walled circular cylindersKil, Hyun-Gwon 05 1900 (has links)
No description available.
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| 42 |
Instability of finite amplitude wave propagation in harmonically heterogeneous elastic solidsKim, Hyun Sil 12 1900 (has links)
No description available.
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| 43 |
Transverse vibration of a cantilevered circular cylindrical shellScruggs, Roy Mac 08 1900 (has links)
No description available.
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| 44 |
Transverse vibration analysis of a curved sandwich panelPlumbee, Harry Eugene 05 1900 (has links)
No description available.
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| 45 |
Multidimensional reflection and refraction of infinite amplitude stress waves in elastic solidsShu, Kun-Tien 05 1900 (has links)
No description available.
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| 46 |
Rotationally symmetric vibrations of orthotropic layered cylindrical shellsHsu, Teh-min 05 1900 (has links)
No description available.
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| 47 |
Parametric excitation of nonplanar motions of an elastic rodHaight, Edward Charles 05 1900 (has links)
No description available.
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| 48 |
Impact of Acid Additives on Elastic Modulus of Viscoelastic SurfactantsKhan, Waqar Ahmad 2011 December 1900 (has links)
In live acid solutions at concentrations of HCl namely 15-20 wt% HCl, elastic modulus remained quite low as compared to 10-12 wt% HCl concentrations. At 10 wt% HCl concentration, elastic modulus was 3.4 Pa observed whereas at 20 wt% HCl concentration, elastic modulus was 0.03 Pa. 0.5- 1.0 wt% concentrations of NaCl and CaCl2 showed negligible effect on the elastic modulus while 3-10 wt % concentrations, substantially reduced the elastic modulus. As little as 0.5 wt% Fe (III) concentration reduced elastic modulus quite significantly. In live acids, increase in temperature resulted in viscous modulus dominating the elastic modulus. Corrosion inhibitor reduced values of elastic modulus significantly, at 10 wt% HCl concentration elastic modulus dropped from 5.1 Pa to 3.4 Pa. Preparation of acid solution with sea water showed negligible effect at higher concentrations of HCl (> 10 wt% HCl) whereas at lower concentrations of HCl the elastic modulus fell sharply.
For spent acid solutions, the elastic modulus at room temperature was quite low. Increase in temperature resulted in the increase in elastic modulus up to 130 F after which it decreased. At 190 - 205F and 18.8 rad/s, elastic modulus for 12 wt% HCl concentrations was 0.4 Pa whereas at 130 F, it was 2.25 Pa. At high temperatures (>130 F), the maximum elastic modulus shifted to higher concentrations of HCl namely 20 wt% HCl concentration. At 160 F, elastic modulus of 20 wt% HCl concentration at 18.8 rad/s was observed to be 2.6 Pa, whereas for 12 wt% HCl concentrations, it was 1.27 Pa. Throughout the HCl concentration and temperature range tested, viscous modulus dominated the elastic modulus for spent acid solutions.
The effects of organic acids namely, formic and acetic acid, on the elastic modulus of viscoelastic surfactants have also been investigated.
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| 49 |
Scattering of elastic waves in layered media: a boundary integral-normal mode methodKessel, Ronald T. 16 July 2015 (has links)
Graduate
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| 50 |
Mechanics of mandrel-expanded bushing installation in fastener holes in aluminium alloy lugsHyzer, James B. January 1991 (has links)
No description available.
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