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Update README.md
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Fixed some typos.
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@MarkusSchilling
MarkusSchilling committed Jul 24, 2024
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Expand Up @@ -83,7 +83,7 @@ In this section, some documents and tools are listed (and linked, if applicable)
supported the ontology creation or provide some additional information.

+ [Repository of TTO](https://github.com/materialdigital/application-ontologies/tree/main/tensile_test_ontology_TTO) | Files will be stored here, e.g., TTL file of TTO or exemplary RDF files
+ [Tensile Test Ontology (TTO) file](https://github.com/materialdigital/application-ontologies/blob/main/tensile_test_ontology_TTO/pmdao_TTO.ttl) | TTL file of the TTO in PMDco repository
+ [Tensile Test Ontology (TTO) file](https://github.com/materialdigital/application-ontologies/blob/main/tensile_test_ontology_TTO/pmd_tto.ttl) | TTL file of the TTO in PMDco repository
+ [TTO auto-created documentation](https://materialdigital.github.io/application-ontologies/tto/index-en.html) | A documentation of the TTO auto-generated by Widoco tool
+ [Standard ISO 6892-1:2019-11](https://www.beuth.de/de/norm/iso-6892-1/316885984) | The ISO standard the TTO development is based on
+ [Visualization of preferable tensile test data structure](https://github.com/materialdigital/application-ontologies/blob/main/tensile_test_ontology_TTO/Tensile_Test_Data_Structure_DIN_ad-hoc.pdf) | Visualization of a preferable tensile test data structure, which is the result of an ad-hoc group of the DIN EN ISO 6892-1 standardization committee; basis for TTO development
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| Axiom | Description |
|--------------------------------------------------------------------------------------------------------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| :relatesToExtension some ('has value' value 0.1f) | **_Rp0.1_** depends on the value of the _Percentage Extension_, which has to be exactly 0.1%. |
| :relatesToExtension some ('has value' value 0.2f) | **_Rp0.2_** depends on the value of the _Percentage Extension_, which has to be exactly 0.2%. |
| :relatesTo some :PercentageExtension | **_Proof Strength Total Extension_** depends on _Percentage Extension_. It has to be the value of the stress measured at the highest measured percentage extension value. |
| :relatesTo some :OriginalGaugeLength | **_Elongation_** refers to _Original Gauge Length_, because it is measured as the elongation of the original gauge length in mm. |
| :relatesTo some :OriginalGaugeLength | **_Percentage Elongation_** refers to _Original Gauge Length_, because it is measured as the elongation of the original gauge length in %. |
| :relatesTo some :OriginalGaugeLength | **_Percentage Permanent Elongation_** relates to _Original Gauge Length_, because it is measured as the elongation of the original gauge length in %. |
| :relatesTo some :ExtensometerGaugeLength | **_Percentage Extension_** refers to _Extensometer Gauge Length_, because it is measured in reference to the extensometer gauge length. |
| (:relatesTo some :Stress) and (:relatesTo some :MaximumForce) | **_Tensile Strength_** relates to the _Stress_ measured at _Maximum Force_. |
| :relatesTo some :Stress | **_Yield Strength_** relates to _Stress_ because it is measured in reference to a specific stress value. |
| :relatesTo some :Stress | **_Lower Yield Strength_** relates to _Stress_ because it is measured in reference to a specific stress value. |
| :relatesTo some :Stress | **_Upper Yield Strength_** relates to _Stress_ because it is measured in reference to a specific stress value. |
| (:relatesTo some :OriginalDiameter) or ((:relatesTo some :OriginalThickness) and (:relatesTo some :OriginalWidth)) | **_Percentage Reduction of Area_** relates to the _Cross-sectional Area_ of the test piece which is defined by the test piece dimensions such as diameter, thickness, and width, depending on test piece type |
| :relatesTo some :ExtensometerGaugeLength | **_Percentage Extension_** relates to the _Extensometer Gauge Length_ because the extension is expressed as a percentage value referring to the extensometer gauge length |
| :relatesTo some :ExtensometerGaugeLength | **_Percentage Permanent Extension_** relates to the _Extensometer Gauge Length_ because the extension is expressed as a percentage value referring to the extensometer gauge length |
| (:relatesTo some :ExtensometerGaugeLength) and (:relatesTo some :MaximumForce) | **_Percentage Plastic Extension at Maximum Force_** related to the _Extensometer Gauge Length_ (equivalent to 'percentage extension') and the maximum force because it is the plastic proportion of the percentage extension value measured at maximum force |
| (:relatesTo some :ExtensometerGaugeLength) and (:relatesTo some :MaximumForce) | **_Percentage Total Extension at Maximum Force_** related to the _Extensometer Gauge Length_ (equivalent to 'percentage extension') and the maximum force because it is the total percentage extension value measured at maximum force |
| :relatesTo some :ExtensometerGaugeLength | **_Extension_** relates to the _Extensometer Gauge Length_ because the extension is measured referring to the extensometer gauge length |
| :relatesTo some :OriginalGaugeLength | **_Elongation_** relates to the _Original Gauge Length_ because the elongation is measured referring to the original gauge length |
| :relatesTo some :OriginalGaugeLength | **_Percentage Elongation_** relates to the _Original Gauge Length_ because the elongation is measured as a percentage value referring to the original gauge length |
| :relatesTo some :OriginalGaugeLength | **_Percentage Elongation after fracture_** relates to the _Original Gauge Length_ because the elongation is measured as a percentage value referring to the original gauge length, however, the moment of fracture is not further defined as a concept and depends on the test operator |
| :relatesTo some :OriginalGaugeLength | **_Percentage Permanent Elongation_** relates to the _Original Gauge Length_ because it describes the increase in the original gauge length of a test piece after removal of a specified stress, expressed as a percentage of the original gauge length |
| :participant some :TestPiece AND :participant some :TensileTestingMachine | **_Tensile Test_** (process) has to have the participants (tensile) _Test Piece_ and _Tensile Testing Machine_; without these participants, no tensile tests can be performed |
| :RP01 :relatesToExtension some ('has value' value 0.1f) | **_Rp0.1_** depends on the value of the _Percentage Extension_, which has to be exactly 0.1%. |
| :RP02 :relatesToExtension some ('has value' value 0.2f) | **_Rp0.2_** depends on the value of the _Percentage Extension_, which has to be exactly 0.2%. |
| :ProofStrengthTotalExtension :relatesTo some :PercentageExtension | **_Proof Strength Total Extension_** depends on _Percentage Extension_. It has to be the value of the stress measured at the highest measured percentage extension value. |
| :Elongation :relatesTo some :OriginalGaugeLength | **_Elongation_** refers to _Original Gauge Length_, because it is measured as the elongation of the original gauge length in mm. |
| :PercentageElongation :relatesTo some :OriginalGaugeLength | **_Percentage Elongation_** relates to the _Original Gauge Length_ because the elongation is measured as a percentage value referring to the original gauge length. |
| :PercentagePermanentElongation :relatesTo some :OriginalGaugeLength | **_Percentage Permanent Elongation_** relates to the _Original Gauge Length_ because it describes the increase in the original gauge length of a test piece after removal of a specified stress, expressed as a percentage of the original gauge length. |
| :PercentageElongationAfterFracture :relatesTo some :OriginalGaugeLength | **_Percentage Elongation after fracture_** relates to the _Original Gauge Length_ because the elongation is measured as a percentage value referring to the original gauge length, however, the moment of fracture is not further defined as a concept and depends on the test operator. |
| :TensileStrength (:relatesTo some :Stress) and (:relatesTo some :MaximumForce) | **_Tensile Strength_** relates to the _Stress_ measured at _Maximum Force_. |
| :YieldStrength :relatesTo some :Stress | **_Yield Strength_** relates to _Stress_ because it is measured in reference to a specific stress value. |
| :LowerYieldStrength :relatesTo some :Stress | **_Lower Yield Strength_** relates to _Stress_ because it is measured in reference to a specific stress value. |
| :UpperYieldStrength :relatesTo some :Stress | **_Upper Yield Strength_** relates to _Stress_ because it is measured in reference to a specific stress value. |
| :PercentageReductionOfArea (:relatesTo some :OriginalDiameter) or ((:relatesTo some :OriginalThickness) and (:relatesTo some :OriginalWidth)) | **_Percentage Reduction of Area_** relates to the _Cross-sectional Area_ of the test piece which is defined by the test piece dimensions such as diameter, thickness, and width, depending on test piece type. |
| :Extension :relatesTo some :ExtensometerGaugeLength | **_Extension_** relates to the _Extensometer Gauge Length_ because the extension is measured referring to the extensometer gauge length. |
| :PercentageExtension :relatesTo some :ExtensometerGaugeLength | **_Percentage Extension_** relates to the _Extensometer Gauge Length_ because the extension is expressed as a percentage value referring to the extensometer gauge length. |
| :PercentagePermanentExtension :relatesTo some :ExtensometerGaugeLength | **_Percentage Permanent Extension_** relates to the _Extensometer Gauge Length_ because the extension is expressed as a percentage value referring to the extensometer gauge length. |
| :PercentagePlasticExtensionAtMaximumForce (:relatesTo some :ExtensometerGaugeLength) and (:relatesTo some :MaximumForce) | **_Percentage Plastic Extension at Maximum Force_** related to the _Extensometer Gauge Length_ (equivalent to 'percentage extension') and the maximum force because it is the plastic proportion of the percentage extension value measured at maximum force. |
| :PercentageTotalExtensionAtMaximumForce (:relatesTo some :ExtensometerGaugeLength) and (:relatesTo some :MaximumForce) | **_Percentage Total Extension at Maximum Force_** related to the _Extensometer Gauge Length_ (equivalent to 'percentage extension') and the maximum force because it is the total percentage extension value measured at maximum force. |
| :TensileTest :participant some :TestPiece AND :participant some :TensileTestingMachine | **_Tensile Test_** (process) has to have the participants (tensile) _Test Piece_ and _Tensile Testing Machine_; without these participants, no tensile tests can be performed. |

### Namespaces
In this section, the namespaces used in TTO are listed. These can also be found in the [pmd_tto.ttl file](https://github.com/materialdigital/core-ontology/blob/main/pmd_tto.ttl).
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