BS ISO 17340:2020 pdf free.Metallic materials一Ductility testing一High speed compression test for porous and cellular metals.
BS ISO 17340 The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 376, Metallic materials一Calibration of force-proving instruments used for the verification of uniaxial testing machines ISO 7500-1, Metallic materials一- Calibration and verification of static uniaxial testing machines一Part 1: Tension/compression testing machines一Calibration and verification of the force-measuring system ISO 13314, Mechanical testing of metals一Ductility testing一Compression test for porous and cellular metals ISO 80000-1, Quantities and units一Part 1: General This test consists of applying an impact force at test speeds between 0,1 m/s and 100 m/s to porous and cellular metals and measuring the compressive force and displacement for evaluation of their high- speed compressive deformation characteristics, such as plateau stress and energy absorption. Test methods that apply high-speed compressive forces to porous and cellular metals are the drop weight impact test and the servo-type high-speed compression test. The drop weight impact test applies the compressive force by dropping a weight from a specified height. The test speed is controlled by the drop height. Due attention should be paid to the fact that the weight will be decelerated during the period of compressive deformation. When the drop height necessary to reach the specified test speed cannot be obtained, application of an initial velocity to the weight is possible. The servo-type high-speed compression test applies the compressive force using a hydraulic or electric high-speed servo mechanism. The test speed is changed by the servo control. The drive unit shall be capable of following the test speed. The pressing jigs are located above and below the test piece and are used to apply the compressive force to the test piece. The pressing jig shall be of a construction such that it does not deform due to the compressive force, allowing correct transmission of the compressive force in the axial direction and preventing the action of forces, such as bending stress, etc., other than the compressive force on the test piece.BS ISO 17340 pdf download.