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Regression Functions for Transition Curves

Result description

Loaded materials can fail by rapid fracture at stresses much below their strength level as determined in tests on carefully prepated specimens. To ensure fracture-safe design in the materials , the transition-temperature approach is often used. One of the experimental possibilities determining transition temperature isn the Charpy impact test, when a notched-bar speciamen is loaded in bending by a swinging pendulum and the energy absorbed in the fracturing specimen is measured. Impact energy vs. temperaature curve called transitioncurve is divided into three regions : the region of lower temperatures with brittle fracture and low values of absorbed energy (lower shelf), the transition region, and the region of higher temperatures with ductile fractureand high values of absorbed energy (higher shelf). Often also the lateral expansion of broken bars and percentage of brittle (or ductile) fracture surface is measured.

Keywords

Regression FuncitonRegression Parameters

The result's identifiers

Alternative languages

  • Result language

    angličtina

  • Original language name

    Regression Functions for Transition Curves

  • Original language description

    Loaded materials can fail by rapid fracture at stresses much below their strength level as determined in tests on carefully prepated specimens. To ensure fracture-safe design in the materials , the transition-temperature approach is often used. One of the experimental possibilities determining transition temperature isn the Charpy impact test, when a notched-bar speciamen is loaded in bending by a swinging pendulum and the energy absorbed in the fracturing specimen is measured. Impact energy vs. temperaature curve called transitioncurve is divided into three regions : the region of lower temperatures with brittle fracture and low values of absorbed energy (lower shelf), the transition region, and the region of higher temperatures with ductile fractureand high values of absorbed energy (higher shelf). Often also the lateral expansion of broken bars and percentage of brittle (or ductile) fracture surface is measured.

  • Czech name

    Regresní funkce tranzitních křivek

  • Czech description

    Pomocí testů speciálně připravených vzorků bylo zjištěno, že materiály se mohou během zatěžování náhle porušit při napětích nižších než mez pevnosti v důsledku změny teploty. Pro posouzení lomového chování materiálů v závislosti na teplotě, tzv. tranzitního lomového chování se používá zkouška rázem v ohybu, při které dochází k přeražení zkušebního tělíska s vrubem jedním rázem tzv. Charpyho kladiva a měří se absorbovaná energie při porušení vzorku. Křivka závislosti velikosti nárazové práce na teplotě sse nazývá tranzitní křivka a je rozdělena na tři oblasti : oblast nižkých teplot s křechkým lomem a nízkými hodnotami nárazové práce, přechodová oblast a oblast vysokých teplot s vysokými hodnotami nárazové práce a s tvárným lomem

Classification

  • Type

    Jx - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

  • CEP classification

    JL - Fatigue and fracture mechanics

  • OECD FORD branch

Result continuities

Others

  • Publication year

    2005

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Name of the periodical

    Zeszyty naukowe politechniki Opolskiej seria Mechanika

  • ISSN

    1429-6055

  • e-ISSN

  • Volume of the periodical

    86

  • Issue of the periodical within the volume

    308

  • Country of publishing house

    PL - POLAND

  • Number of pages

    5

  • Pages from-to

    241-245

  • UT code for WoS article

  • EID of the result in the Scopus database

Basic information

Result type

Jx - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

Jx

CEP

JL - Fatigue and fracture mechanics

Year of implementation

2005