GB/T 4161-2007: Translated English of Chinese Standard. (GBT 4161-2007, GB/T4161-2007, GBT4161-2007): Metallic Materials - Determination of Plane-Strain Fracture Toughness
https://www.chinesestandard.net, 2018 M06 2 - 32 pages
This Standard specifies the method for determining the plane-strain fracture toughness of the homogeneous metallic materials using a specimen that is notched and precracked by fatigue and subjected to slowly increasing crack displacement force.
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Appendix F Informative Circular Compact Tensile Specimen Test
accordance with GB/T accurate to 0.025mm Appendix F Informative applied force attachable knife edges average crack length bend specimen bend test fixture C-shaped tensile specimen Calculation KQ chevron circular compact tensile Clause compact tensile specimen computer data acquisition crack extension crack tip Crack-plane orientation data acquisition system direction of crack exceed fatigue precracking Figure B.1 Figure D.2 force FQ Formula fracture toughness KIc fracture toughness test grain flow direction international standard linear portion loading hole maximum stress Measure specimen measurement value Metallic Materials minimize friction effects Normative References Notch opening displacement Notch width oblique fracture Offset yield strength plane plane-strain fracture toughness plastic deformation Recommended specimen requirements rollers with deviation shown in Figure span specimen dimensions specimen proportions specimen surface specimen thickness specimens is shown standard length stress intensity factor suitable for testing support roller Tensile Specimen Test Test procedure test results test specimen Testing Machines whichever is larger