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Experimental Study On Viscoelastic Properties And Fracture Characteristics In Polymers, Debaranjan Mohanty
Experimental Study On Viscoelastic Properties And Fracture Characteristics In Polymers, Debaranjan Mohanty
Electronic Theses and Dissertations
The research reported in this thesis is undertaken with the following objectives:
1. To determine the viscoelastic properties of polymers on creep test under constant load;
2. To determine the internal friction (loss factor) of polymers under periodic loading condition;
3. To determine the delayed time or life time on fracture of the polymer under constant loading ; and
4. To verify the relationship, theoretically predicted, between the time to fracture and the material characteristics of the polymer with experimental observations.
The Role Of Rainfall Impact And Surface Flow In Soil Detachment And Transport, Robert Alan Young
The Role Of Rainfall Impact And Surface Flow In Soil Detachment And Transport, Robert Alan Young
Electronic Theses and Dissertations
Soil erosion caused by rainfall is a very complex physical process. To evaluate the mechanism of erosion so that an assessment can be made of the extent to which it may be controlled necessarily begins with an understanding of the basic fundamental factors involved. The purpose of this study involves the development of an insight of the relative importance of the roles played by various contributors to the erosion process. Particular emphasis is placed on the contribution of rainfall detached soil to total soil loss. Three soil types, Barnes loam, Crofton silt loam and Central sandy loam, were prepared with …
A Simulation Of Sediment Deposit In Open Channels, Tsan-Wen Wang
A Simulation Of Sediment Deposit In Open Channels, Tsan-Wen Wang
Electronic Theses and Dissertations
In this study, two mathematical models have been developed to simulate sediment deposition in open-channel flow; a model based on three characteristic equations and a model based on two characteristic equations. A set of three partial differential equations for one dimensional transient flow with homogeneous density was provided to explain the mechanics of the phenomenon. By the method of characteristics, three partial differential equations were transformed into a set of three ordinary differential equations or a set of two ordinary differential equations by simplification in which the change of sediment layer thickness with respect to distance was assumed to be …
Analysis Of Variation Of River Flow And Water Quality In The White River Basin, Michael Stephen Thompson
Analysis Of Variation Of River Flow And Water Quality In The White River Basin, Michael Stephen Thompson
Electronic Theses and Dissertations
The main objectives of this White River Basin study were to analyze flow variation records, to investigate existing river water quality data as compared with the designated beneficial uses for the basin and to consider the influence of present and future irrigation development. Data were collected from a number of sources and brought together for interpretation with respect to these objectives. The streamflow study utilizes the streamflow records from 10 gaging stations in the White River Basin. It is expected that the results of this investigation may be of assistance to the South Dakota Water Resources Commission and the South …
An Incrementally Distributed Mathematical Model Of A Watershed, Charles Arnold Onstad
An Incrementally Distributed Mathematical Model Of A Watershed, Charles Arnold Onstad
Electronic Theses and Dissertations
The utilization of distributed input parameters enables hydrologists to more adequately cope with watershed management problems. A distributed system aids in evaluating alternative solutions designed to alleviate a problem situation. As a result, the objectives of this study were (1) to develop a hydrological framework delineating the surf ace configuration of a watershed to consider parameter distribution; (2) to develop a model of hydrologic performance of a watershed using existing techniques and amenable to the physical framework; and (3) to demonstrate the versatility of the model using hypothetical data. The model versatility was demonstrated by showing the effects of different …