Standard Svensk standard · SS-ISO 27306:2016

Metalliska material - Metod för att ta hänsyn till låg treaxlighet vid utvärdering av brottseghet i stålkomponenter baserat på CTOD (ISO 27306:2016, IDT)

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Standard Svensk standard · SS-ISO 27306:2016

Metalliska material - Metod för att ta hänsyn till låg treaxlighet vid utvärdering av brottseghet i stålkomponenter baserat på CTOD (ISO 27306:2016, IDT)
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Omfattning
In fracture assessments of steel structures containing cracks, it has generally been assumed that the fracture resistance of fracture toughness specimens is equal to the fracture resistance of structural components. However, such an assumption often leads to excessively conservative fracture assessments. This is due to a loss of plastic constraint in structural components, which are subjected mainly to tensile loading. By contrast, fracture toughness specimens hold a constrained stress state near the crack-tip due to bending mode. The loss of constraint is significant for high strength steels with high yield-to-tensile ratios (= yield stress/tensile strength) which have been extensively developed and widely applied to structures in recent years.This International Standard specifies a method for converting the CTOD (crack-tip opening displacement) fracture toughness obtained from laboratory specimens to an equivalent CTOD for structural components, taking constraint loss into account. This method can also apply to fracture assessment using the stress intensity factor or the J-integral concept (see Clause 9).This International Standard deals with the unstable fracture that occurs from a crack-like defect or fatigue crack in ferritic structural steels. Unstable fracture accompanied by a significant amount of ductile crack extension and ductile fractures are not included in the scope hereof.The CTOD fracture toughness of structural steels is measured in accordance with the established test methods, ISO 121351) or BS 7448-1. The fracture assessment of a cracked component is done using an established method such as FAD (Failure Assessment Diagram) in the organization concerned, and reference is not made to the details thereof in this International Standard.

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Provtagning för mekanisk provning (77.040.10)


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Standard Svensk standard · SS-ISO 27306:2016

Metalliska material - Metod för att ta hänsyn till låg treaxlighet vid utvärdering av brottseghet i stålkomponenter baserat på CTOD (ISO 27306:2016, IDT)
Prenumerera på standarden - Läs mer Dölj
Pris: 1 416 SEK
standard ikon pdf

PDF

Pris: 1 416 SEK
standard ikon

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Pris: 2 265,60 SEK
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Produktinformation

Språk: Engelska

Framtagen av: Mekanisk provning, SIS/TK 123

Internationell titel: Metallic materials - Method of constraint loss correction of CTOD fracture toughness for fracture assessment of steel components (ISO 27306:2016, IDT)

Artikelnummer: STD-8022899

Utgåva: 2

Fastställd: 2016-10-17

Antal sidor: 60

Ersätter: SS-ISO 27306:2012