The Mechenical Mechenism of Single Layer Folds
Date Issued
2006
Date
2006
Author(s)
Huang, Kuo-Pin
DOI
zh-TW
Abstract
This research proposes a new approach towards obtaining a rational explanation of the relationship between single layer folds and lateral compression. This approach can be used to as a theoretical explanation for the composition of geologic matrix and folds. This research uses the deductive approach on six kinds of composite media by depth to achieve a successful solution of the single layer fold theory. The theoretical solution applied for the elastic layer fold is similar to Currie’s 1962, while the solution used for finding a dominant wavelength in viscous media is analogous to Biot’s theory (1961). The theorem applied in this research can quantitatively describe the relationship between layer’s fold wavelength and lateral shortening strain.
Jeng et al. (2002) discretized the elastic matrix into a spring model, successfully formulating a theory to describe the decay amplitude waveform of folds. This research uses the same technique to adjust the spring model and proposes a new theory for the explanation of the decay amplitude waveform of folds. Thus, the same method is applied for the explanation of decay amplitude waveform fold for six kinds of composite media.
Using a combination of continuous matrix and discretization analysis, we can explain the folding patterns (e.g. double frequency folding, single frequency folding and folding decay) seen on the field. The above theorem has been thoroughly tested through evaluation by mathematical analysis, thus effectively giving a quantitative and qualitative description of frequently seen trends in geologic folding.
We are convinced that the structural geology of most outdoor geologic folding trends can be explained by past studies and this research.
Subjects
褶皺
挫屈
理論解
雙頻波形
顯著波長
衰減振幅
黏性
黏彈性
彈性
buckle
fold
theoretical solution
duel-frequence waveform
dominante wavelength
viscous
elastic
viscoelastic
Type
thesis
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