Document Details |
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| Name of Department/Committee : | MTD 03 | ||||
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| Document Number : | MTD 03 ( 20809) | ||||
| Document Title [English] : | Method of dynamic force calibration of axial load fatigue testing machines by means of a strain gauge technique | ||||
| Document Title [Hindi] : | विकृति गेज तकनीक के माध्यम से अक्षीय भार श्रांति परीक्षण मशीनों के गत्यात्मक बल अंशशोधक की पद्धति | ||||
| Document Type : | Revision | ||||
| Language : | English | ||||
| Priority : | 3 | ||||
| ICS Code : | 77.040.10 | ||||
| Date of Project Approval : | 13-10-2022 | ||||
| Standards to be Revised : |
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| Standards to be Superseded : |
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Classification Details |
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| Group : | Metals, Alloys and Metal Products (including Steel Products) |
| Sub Group : | Heat treatment, metallography and testing |
| Sub Sub Group : | Methods of mechanical testing of metals |
| Aspects : | Code of Practice |
| Risk : | None |
| Certification : | None |
| Short Commom Man's Title : | Method of dynamic force calibration of axial load fatigue testing machines by means of a strain gau |
| ITCHS Code : | NA |
| Ministry : | |
| Sustainable development Goals : | |
| Degree of Equivalence : | Indigenous |
| Identical/Equivalent Standards : | |
| Organization Type: | |
| Sl.No. | Synosis Points | |
| 1 | This revision has been brought out to bring the standard in the latest style and format of the Indian Standards. This standard was prepared in order to unify method of dynamic force calibration of axial load fatigue testing machines by means of a strain gauge technique. Whilst it is relatively simple to carry out a calibration of the forces applied by a fatigue testing machine under static conditions, it is essential to establish that the dynamic forces actually applied to the test piece are those indicated by the machine within acceptable limits of accuracy. | |
| 2 | As some fatigue machines operate over a range of testing frequencies, the inertia effects of moving parts are not constant but vary. For such machines, a dynamic correction factor may therefore have to be applied to the indicated forces to obtain the force actually effective at the test piece. This factor is a function, for example, of the vibrating mass of the machine, of the test piece stiffness and the operating frequency, and the correction date is customarily supplied by the manufacturer of the testing machine. Thus, the object of fatigue testing machine calibration is to compare indicated forces, multiplied by an appropriate correction factor where applicable, with actual test forces over the operating range of the machine. | |
| 3 | This standard is particularly concerned with the calibration of axial load machines as the procedures for their calibration are generally more complex. The calibration of rotating bending and torsional fatigue testing machines can usually be satisfied simply by direct measurements of the effective test piece length and by direct verification of the applied force or displacement. | |
Timeline Details |
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Stages |
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| Sl. No. |
Stage | Date of Occurence | Remarks | Circulated to | Files |
| 1 | Generation of Document Number | 13-10-2022 | ------- | ||
| 2 | P-Draft | 17-10-2022 | Covering letter generated | ------- | |
| 3 | P-Draft | 17-10-2022 | Duration : 21 Days Remarks : Working draft of IS 6886 |
MTD 3, | ------- |
| 4 | Skipped to W-Draft | 20-12-2022 | Stage-Changed | ------- | |
| 5 | WC Draft | 20-12-2022 | Duration : 30 Days Submitted for HOD approval |
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| 6 | WC Draft | 20-12-2022 | WC approved by HOD |
MTDC | ------- |