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 [Buy--download True-PDF in 3-second: https://play.google.com/books > Sign in > This BOOK > "3-dots" > Export > Save as "*.pdf"]https://www.chinesestandard.net, 2018. 6. 2. - 32페이지 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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accordance with GB/T accurate to 0.025mm Appendix A Normative Appendix E Informative Appendix F applied force attachable knife edges average crack length bend test fixture C-shaped tensile specimen calibrated chevron circular compact tensile Clause compact tensile specimen computer data acquisition crack extension crack tip Crack-plane orientation direction of crack exceed F Informative fatigue crack fatigue precracking Figure B.1 Figure D.2 Formula fracture toughness KIc fracture toughness test grain flow direction international standard K₁c test loading hole Measure specimen measurement value Metallic Materials minimize friction effects Normative References Notch opening displacement Notch width 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 valid KIc whichever is larger