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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ASTM E399 (Standard Test Method for Plane Strain Fracture Toughness for Metallic Materials)
Fatigue Precracking see also 1. Originally published as D399-90 — 70 T. Link to Active This link will always route to the current Active version of the standard.
This standard has been approved for use by agencies of the Department of Defense. Guide B provides supplementary guidelines for plane strain fracture toughness testing of aluminum alloy products for which complete stress relief is not practicable.
Therefore, compliance with the specified validity criteria of this test method is essential. General information and requirements common to all specimen types are listed as follows:. Additional annexes are provided that give specific procedures for beryllium and rapid-force testing.
Details of test apparatus, specimen configuration, and experimental procedure are given in the Annexes. Compact Specimen C T. Bend Specimen Loading Fixture. 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.
Standard and Alternative Specimen Configurations. Compact Specimen Loading Clevis. Bend Specimen SE B. 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. There is no standard test method for testing such thin materials.
General information and requirements common to all specimen types are listed as follows: The first part gives general recommendations and requirements for K Ic testing.
Enviado por Giulio flag Denunciar. 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. Work Item s – proposed revisions of this standard. Fatigue Crack Starter Notches. 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.
The first part gives general information concerning the recommendations and requirements for Ic testing. Work Item s – proposed revisions of this standard. Therefore, when K Ic is applied to the design of service components, differences between laboratory test and field conditions shall be considered. A superscript epsilon e indicates an editorial change since the last revision or reapproval.
This strength ratio is a function of the maximum load the specimen can sustain, its initial dimensions and the yield strength of the material. Calculation and Interpretation of Results. Active view current version of standard.
In addition, an annex is provided for the specific procedures to be followed in rapid-load plane-strain fracture toughness tests. The first part gives general information concerning the recommenda- tions and requirements for KIc testing. Historical Version s – view previous versions of standard. Last previous edition E — Summary of Test Method.
The effect can be especially significant d399-90 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.
The present test method does not apply to such materials and the user is referred to Test Method E and E Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. In addition, an annex is provided for the specific procedures to be followed in rapid-load plane-strain fracture toughness tests.
NOTE 1—Plane-strain fracture toughness tests of thinner materials that are sufficiently brittle see 7.
ASTM E – 90() Standard Test Method for Plane-Strain Fracture Toughness of Metallic Materials
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 appro- priate safety and health practices and determine the applica- bility of regulatory limitations prior to astmm. The second part consists of Annexes that give specific information on displacement gage and loading fixture design, special requirements for individual specimen f399-90, and detailed procedures for fatigue precracking.
Likewise this test method does not apply to high toughness or high tearing-resistance materials whose failure is accompanied by appreciable amounts of plasticity. Indications of residual stress include distortion during specimen machining, results that are specimen configuration dependent, and irregular fatigue precrack growth either e939-90 crack front curvature or out-of-plane growth.
Specimen Size, Configurations, and Preparation see also 1.
ASTM E Standard Test Method for Plane-Strain Fracture – Google Books
Current edition approved Nov. Apparatus e399–90 also 1. K Asfm may also be expected to rise with increasing ligament size. Crack extension under cyclic or sustained forces as by stress corrosion cracking or creep crack growth can be influenced by temperature and environment.
A number in parentheses indicates the year of last reapproval. Crack Extension Beyond Starter Notch. Note 1-Plane-strain fracture toughness tests of thinner materials that are sufficiently brittle see 7. The details of the various specimen and test configurations are shown in Annexes A1 through A7 and A9.