ASTM E399-90 PDF

Apr + Designation: E – 90 (Reapproved ). Standard Test Method for This test method is under the jurisdiction of ASTM Committee E-8 on. Futgue and . Properties and Testing of Materialsداوملا رابتخاو صاوخ ميحرلا نمحرلا لا مسب Determination of Fracture Toughness “Plane-S. This standard is issued under the fixed designation E ; the number immediately following the designation indicates the 1 This test method is under the jurisdiction of ASTM Committee E08 on Fatigue .. Note 2—Cutter tip angle 90° max.

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Standard and Alternative Specimen Configurations.

It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine asmt applicability of regulatory limitations prior to use. Background information concerning the basis for development of this test method in terms of linear elastic fracture mechanics may be found in Refs 1 and 2.

The orientation of the crack plane should be identified wherever possible in accordance with the following systems f399-90 K Ic may also be expected to rise with increasing ligament size. Summary of Test Method. It is the responsibility of the user of this standard to establish appro- priate safety and health practices and determine the applica- bility of regulatory limitations prior to use.

Active view current version of standard. This identification is designated by a hyphenated code with the first letter s representing the direction normal to the crack plane and the second letter s designating the expected direction of crack propagation.

Therefore, when Asstm Ic is applied to the design of service components, differences between laboratory test and field conditions shall be considered. A aastm in parentheses indicates the year of last reapproval.

NOTE 1—Plane-strain fracture toughness tests of thinner asttm that are sufficiently brittle see 7. Fatigue Precracking see also 1. Indications of residual stress include distortion during specimen machining, results that are specimen configuration dependent, and irregular fatigue precrack growth either excessive crack front curvature or out-of-plane growth. Apparatus see also 1. The second part is composed of annexes that give the displacement gage design, fatigue cracking procedures, and special requirements for the various specimen configurations covered by this method.

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Bend Specimen Loading Fixture. A superscript epsilon e indicates an editorial change since the last revision or reapproval. Fatigue Precracking KIc Specimens.

Plane-strain fracture toughness tests of thinner materials that are sufficiently brittle see 7. Therefore, compliance with the specified validity criteria of this test method is essential. In addition, an annex is provided for the specific procedures to be followed in rapid-load plane-strain fracture toughness tests.

Aztm this test method does not apply to high toughness or high tearing-resistance materials whose failure is accompanied by appreciable amounts of plasticity.

ASTM E Standard Test Method for Plane-Strain Fracture – Google Books

This strength ratio is a function of the maximum load the specimen can sustain, its initial dimensions and the yield strength of the material. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

Details of test apparatus, specimen configuration, and experimental procedure are given in the Annexes. Link to Active This link will always route to the current Active version of the standard.

General information and requirements common to all specimen types are listed as follows: Historical Version s – view previous versions of standard. Crack Extension Beyond Starter Notch. General information and requirements common to all specimen types are listed as follows: Compact Specimen C T.

ASTM E – 90() Standard Test Method for Plane-Strain Fracture Toughness of Metallic Materials

The present test method does not apply to such materials and the user is referred to Test Method E and E General information and requirements common to all specimen types are listed as follows:. Enviado por Giulio flag Denunciar. Originally published as E — 70 T. The first part gives general recommendations and requirements for K Ic testing. Additional annexes are provided that give specific procedures for beryllium and rapid-force testing.

Link to Active This link will always route to the current Active version of the standard. The second part consists of Annexes that give specific information on displacement gage and loading fixture design, special requirements for individual specimen configurations, and detailed procedures for fatigue precracking.

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Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. The first part gives general information concerning the recommendations and requirements for Ic testing. The first part gives general information concerning the recommenda- tions and requirements for KIc testing.

This standard has been approved for use ast agencies of the Department of Defense.

Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. The e39-90 can be especially significant for specimens removed from as-heat treated or otherwise non-stress relieved stock, from weldments, from complex wrought parts, or from parts with intentionally induced residual stresses.

ASTM E399 (Standard Test Method for Plane Strain Fracture Toughness for Metallic Materials)

Guidance on testing elastic-plastic materials is given in Test Method E E — 90 Reapproved Standard Test Method for Plane-Strain Fracture Toughness of Metallic Materials1 This standard is issued under the fixed designation E ; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision.

The specification of K Ic values in relation to a particular application should signify that a fracture control study has been conducted for the component in relation to the expected loading and environment, and in relation to the sensitivity and reliability of the crack detection procedures that are to be applied prior to service and subsequently during the anticipated life. Crack extension under cyclic or sustained forces as by stress corrosion cracking or creep crack growth can be influenced by temperature and environment.