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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Historical Version s – view previous versions of standard. Work Item s – proposed revisions of this standard.
K Ic may d399-90 be expected to rise with increasing ligament size. The present astk method does not apply to such materials and the user is referred to Test Method E and E Likewise this test method does e3399-90 apply to high toughness or high tearing-resistance materials whose failure is accompanied by appreciable amounts of plasticity.
Guidance on testing elastic-plastic materials is given in Test Method E Background information concerning the basis for development of this test method in terms of linear elastic fracture mechanics may be found in Refs 1 astmm 2. Crack extension under cyclic or sustained forces as by stress corrosion cracking or creep crack growth can be influenced by e399-90 and environment.
Therefore, when K Ic is applied to the design of service components, differences between laboratory test and field conditions shall be considered.
Therefore, compliance with the specified validity criteria of this test method is essential. The effect can be especially significant for specimens removed from as-heat treated or otherwise non-stress relieved stock, from weldments, from complex wrought r399-90, or from parts with intentionally induced residual stresses.
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. Guide B provides supplementary guidelines for plane strain fracture toughness testing of aluminum alloy products for which complete stress relief is not practicable.
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.
ASTM E Standard Test Method for Plane-Strain Fracture – Google Books
Details of test apparatus, specimen configuration, and experimental procedure are given in the Annexes. Plane-strain fracture toughness tests of thinner materials that are sufficiently brittle see 7.
The first part gives general recommendations and requirements for K Ic testing. The second part consists of Annexes that give specific information on displacement gage and loading e939-90 design, special requirements for individual specimen configurations, and detailed procedures for fatigue precracking.
Additional annexes are provided that give specific procedures for beryllium and rapid-force testing. Apparatus see also 1.
Specimen Size, Configurations, and Preparation see also 1. Standard and Alternative Specimen Configurations. Fatigue Precracking see also 1. Bend Specimen SE B. Compact Specimen C T.
ASTM E399 (Standard Test Method for Plane Strain Fracture Toughness for Metallic Materials)
The values given in parentheses are for information only. 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.
Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. Summary of Test Method. Fatigue Crack Starter Notches. Crack Extension Beyond Starter Notch.
Astj and Interpretation of Results.
Specimen Size Validity Requirements. Bend Specimen Loading Fixture. Compact Specimen Loading Clevis. Fatigue Precracking KIc Specimens.
Link to Active This link will always route to the current Active version of the standard.