Standard Swedish standard · SS-ISO 22889:2013

Metallic materials - Method of test for the determination of resistance to stable crack extension using specimens of low constraint (ISO 22889:2013, IDT)

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Standard Swedish standard · SS-ISO 22889:2013

Metallic materials - Method of test for the determination of resistance to stable crack extension using specimens of low constraint (ISO 22889:2013, IDT)
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Scope
ISO 22889:2013 specifies methods for determining the resistance to stable crack extension in terms of crack opening displacement, d5, and critical crack tip opening angle, ?c, for homogeneous metallic materials by the quasistatic loading of cracked specimens that exhibit low constraint to plastic deformation. Compact and middle-cracked tension specimens are notched, precracked by fatigue, and tested under slowly increasing displacement. ISO 22889:2013 describes methods covering tests on specimens not satisfying requirements for size-insensitive fracture properties; namely, compact specimens and middle-cracked tension specimens in relatively thin gauges. Methods are given for determining the crack extension resistance curve (R-curve). Point values of fracture toughness for compact specimens are determined according to ISO 12135. Methods for determining point values of fracture toughness for the middle-cracked tension specimen are given. Crack extension resistance is determined using either the multiple-specimen or single-specimen method. The multiple-specimen method requires that each of several nominally identical specimens be loaded to a specified level of displacement. The extent of ductile crack extension is marked and the specimens are then broken open to allow measurement of crack extension. Single-specimen methods based on either unloading compliance or potential drop techniques can be used to measure crack extension, provided they meet specified accuracy requirements. Recommendations for single-specimen techniques are described in ISO 12135. Using either technique, the objective is to determine a sufficient number of data points to adequately describe the crack extension resistance behaviour of a material. The measurement of d5 is relatively simple and well established. The d5 results are expressed in terms of a resistance curve, which has been shown to be unique w...

Subjects

Mechanical testing of metals (77.040.10)


Buy this standard

Standard Swedish standard · SS-ISO 22889:2013

Metallic materials - Method of test for the determination of resistance to stable crack extension using specimens of low constraint (ISO 22889:2013, IDT)
Subscribe on standards - Read more Dölj
Price: 1 487 SEK
standard ikon pdf

PDF

Price: 1 487 SEK
standard ikon

Paper

Price: 2 379,20 SEK
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Product information

Language: English

Written by: Svenska institutet för standarder

International title:

Article no: STD-100152

Edition: 1

Approved: 11/12/2013

No of pages: 64