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Description of BS ISO 12110-1:2013 2013This part of ISOÂ 12110 establishes general principles for fatigue testing of laboratory specimens under a sequence of cycles the amplitude of which varies from cycle to cycle. This sequence of cycles is called loading time history (see 3.7) and is usually derived from loading measurements performed on components or structures submitted to true service loadings. Detailed description of service loads recording is relevant to each laboratory or industrial sector and is therefore outside the scope of this part of ISOÂ 12110. The aim of the two parts of ISOÂ 12110 is to set requirements and give some guidance on how to perform a variable amplitude fatigue test in order to produce consistent results for comparison purposes taking into account the typical scatter of fatigue data. Achieving this should help designers to correlate models and experimental data obtained from various sources. Since this part of ISOÂ 12110 involves mainly loading time histories and control signal generation, one expects it might be applied to strain or fatigue crack growth rate controlled loading conditions as well as to force-controlled loading conditions. This is theoretically true but precautions may be taken when applying this part of ISOÂ 12110 to loading modes other than force-controlled loading mode. This part of ISOÂ 12110 relates to variable amplitude loading under force control mode which corresponds to most of the variable amplitude fatigue tests performed worldwide at the date of publication of this part of ISOÂ 12110. This part of ISOÂ 12110 applies to the single actuator loading mode which corresponds to uniaxial loading in many cases. The variable amplitude loading time histories referred in this part of ISOÂ 12110 are deterministic; that is why this part of ISOÂ 12110 deals with variable amplitude loading instead of random loading. The following issues are not within the scope of this part of ISOÂ 12110 and therefore will not be addressed.
About BSIBSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses. |
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