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)
Historical Version s – view previous versions of standard. Work Item s – proposed revisions of this standard. K Ic may also be expected to rise with increasing ligament size. The present test method does not apply to such materials and the user is referred to Test Method E and E Likewise this test method does not 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 atsm in Refs 1 and 2.
Crack extension under cyclic or sustained forces as by stress corrosion cracking or creep crack growth can be influenced by temperature 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 parts, 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.
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.
ASTM E Standard Test Method for Plane-Strain Fracture – Google Books
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 axtm. 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.
ASTM E – 90() Standard Test Method for Plane-Strain Fracture Toughness of Metallic Materials
Standard and Alternative Specimen Configurations. Fatigue Precracking see also 1.
Bend Specimen SE B. Compact Specimen C T. 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 atm 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.
Calculation and Interpretation aetm 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.