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| Description
| - Since the deformation origin of calcite twin lamellae (e-twins) and their crystallographic laws have been determined in the end of the 19th century, it was recognized as the main deformation mechanism of calcite polycrystalline aggregates at low temperatures, low confining pressures and low finite strains (8%; e.g. Turner, 1963; DeBresser, Spiers, 1996). The e-plane will twin if, and only if the shear stress CRSS exceeds the critical value 10 MPa, which is believed to be independent of normal stress, temperature and strain rate (e.g. Laurent et al., 1981). This is one of basic assumptions of the Etchecopar inverse method modified by French authors Laurent, Lacombe et al. (e.g. Lacombe, Laurent, 1996). It is based on applying numerous (500-1000) randomly generated reduced stress tensors and then selecting the best-fit tensor using a penalisation function. When a stress tensor [T] is applied on a set of twin planes, there are four possibilities for any twin plane: 1) the plane is twinned and [T] should
- Since the deformation origin of calcite twin lamellae (e-twins) and their crystallographic laws have been determined in the end of the 19th century, it was recognized as the main deformation mechanism of calcite polycrystalline aggregates at low temperatures, low confining pressures and low finite strains (8%; e.g. Turner, 1963; DeBresser, Spiers, 1996). The e-plane will twin if, and only if the shear stress CRSS exceeds the critical value 10 MPa, which is believed to be independent of normal stress, temperature and strain rate (e.g. Laurent et al., 1981). This is one of basic assumptions of the Etchecopar inverse method modified by French authors Laurent, Lacombe et al. (e.g. Lacombe, Laurent, 1996). It is based on applying numerous (500-1000) randomly generated reduced stress tensors and then selecting the best-fit tensor using a penalisation function. When a stress tensor [T] is applied on a set of twin planes, there are four possibilities for any twin plane: 1) the plane is twinned and [T] should (en)
- Mechanické dvojčatění je v kalcitu dominantním deformančm mechanismem a protože je mechanické dvojčatění krystalograficky dané a je možné pouze v jednom směru, dá se mechanického dvojčatění využít pro paleonapjatostní analýzu. V souasnosti nejužívanější metodou je Etchecoparova inverzní metoda, zaloen na aplikaci vysokého počtu (1000) náhodně volených redukovaných tenzorů napjatosti na data. Pomocí tzv. penalizační funkce se vybere nejvhodnější tenzor. I když Laurent a Lacombe prokázali funkčnost této metody na experimentálně deformovaných vzorcích, podrobná analýza jejich penalizační funkce odhalila její zsadní nedostatek. Penalizační funkce neposkytuje výsledky pro všechny možné tenzory napjatosti a existuje tedy různě vysoká pravděpodobnost, že získané řešení nebude sprvné. Autoři navrhují novou penalizační funkci, která tento zásadní nedostatek eliminuje a rovež má užší maxima. (cs)
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| Title
| - The Black Box of Stress Analysis Based on Calcite Twinning
- Černá skříňka napatostní analýzy založené na dvojčatění kalcitu (cs)
- The Black Box of Stress Analysis Based on Calcite Twinning (en)
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| skos:prefLabel
| - The Black Box of Stress Analysis Based on Calcite Twinning
- Černá skříňka napatostní analýzy založené na dvojčatění kalcitu (cs)
- The Black Box of Stress Analysis Based on Calcite Twinning (en)
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| skos:notation
| - RIV/00216224:14310/06:00016781!RIV08-MSM-14310___
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| http://linked.open.../vavai/riv/strany
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| http://linked.open...avai/riv/aktivita
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| http://linked.open...avai/riv/aktivity
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| http://linked.open...iv/cisloPeriodika
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| http://linked.open...vai/riv/dodaniDat
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| http://linked.open...aciTvurceVysledku
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| http://linked.open.../riv/druhVysledku
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| http://linked.open...iv/duvernostUdaju
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| http://linked.open...titaPredkladatele
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| http://linked.open...dnocenehoVysledku
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| http://linked.open...ai/riv/idVysledku
| - RIV/00216224:14310/06:00016781
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| http://linked.open...riv/jazykVysledku
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| http://linked.open.../riv/klicovaSlova
| - calcite; twinning; stress inversion; black box (en)
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| http://linked.open.../riv/klicoveSlovo
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| http://linked.open...odStatuVydavatele
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| http://linked.open...ontrolniKodProRIV
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| http://linked.open...i/riv/nazevZdroje
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| http://linked.open...in/vavai/riv/obor
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| http://linked.open...ichTvurcuVysledku
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| http://linked.open...cetTvurcuVysledku
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| http://linked.open...UplatneniVysledku
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| http://linked.open...v/svazekPeriodika
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| http://linked.open...iv/tvurceVysledku
| - Melichar, Rostislav
- Rez, Jiří
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| http://linked.open...n/vavai/riv/zamer
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| issn
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| number of pages
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| http://localhost/t...ganizacniJednotka
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