Potřebujeme váš souhlas k využití jednotlivých dat, aby se vám mimo jiné mohly ukazovat informace týkající se vašich zájmů. Souhlas udělíte kliknutím na tlačítko „OK“.
Standard Test Method for Determination of Resistance to Stable Crack Extension under Low-Constraint Conditions (Includes all amendments And changes 1/23/2013).
Automaticky přeložený název:
Standardní zkušební metoda pro stanovení odolnosti na stabilní Crack rozšíření podle Low- omezení podmínky
NORMA vydána dne 15.6.2006
Označení normy: ASTM E2472-06e1
Poznámka: NEPLATNÁ
Datum vydání normy: 15.6.2006
Kód zboží: NS-45383
Počet stran: 26
Přibližná hmotnost: 78 g (0.17 liber)
Země: Americká technická norma
Kategorie: Technické normy ASTM
Keywords:
crack-opening displacement (COD), crack-tip-opening angle, CTOA, crack-tip-opening displacement, CTOD, critical CTOA (psíc), delta5 resistance curve, ductile fracture, elastic-plastic fracture, fracture instability, low-constraint specimens, stable crack extension, Crack-opening displacement, Crack-tip opening displacement (CTOD), Ductile fracture, Elastic-plastic fracture toughness, Fracture instability, Low-constraint conditions, ICS Number Code 77.040.10 (Mechanical testing of metals)
1. Scope | ||||||||||||||||||||||
1.1 This standard covers the determination of the resistance to stable crack extension in metallic materials in terms of the critical crack-tip-opening angle (CTOAc), c and/or the crack-opening displacement (COD), 5 resistance curve (). This method applies specifically to fatigue pre-cracked specimens that exhibit low constraint (crack-length-to-thickness and un-cracked ligament-to-thickness ratios greater than or equal to 4) and that are tested under slowly increasing remote applied displacement. The recommended specimens are the compact-tension, C(T), and middle-crack-tension, M(T), specimens. The fracture resistance determined in accordance with this standard is measured as c (critical CTOA value) and/or 5 (critical COD resistance curve) as a function of crack extension. Both fracture resistance parameters are characterized using either a single-specimen or multiple-specimen procedures. These fracture quantities are determined under the opening mode (Mode I) of loading. Influences of environment and rapid loading rates are not covered in this standard, but the user must be aware of the effects that the loading rate and laboratory environment may have on the fracture behavior of the material. 1.2 Materials that are evaluated by this standard are not limited by strength, thickness, or toughness, if the crack-length-to-thickness (a/B) ratio and the ligament-to-thickness (b/B) ratio are greater than or equal to 4, which ensures relatively low and similar global crack-front constraint for both the C(T) and M(T) specimens (, ). 1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses (English) are for information purposes only. This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. |
||||||||||||||||||||||
2. Referenced Documents | ||||||||||||||||||||||
|
Poslední aktualizace: 31.05.2024 (Počet položek: 2 909 934)
© Copyright 2024 NORMSERVIS s.r.o.