WP1: Review of machines and standards
The aim of this work package is to provide an overview of the measurement principles, technologies, and procedures currently used for force metrological services. It will result in a comprehensive description of the existing force calibration infrastructure, covering both physical (Task 1.1) and documentary standards (Task 1.2). It will also highlight specific areas where traceability needs are not being fully met, by the current arrangements, for industrial force measurement applications whose. These needs will be incorporated in the development of a roadmap (Task 3.3), planning how best to meet them in the future.
WP2: Transfer standards – modelling and digital twins
The aim of this work package is to develop advanced models for force measuring devices which describe the behaviour for static and continuous forces (Task 2.1) and dynamic forces (Task 2.2). The static properties are described by a sensitivity curve for increasing and decreasing forces and the short time creep will be considered for continuous forces. For applications in addition to the sensitivity curve, the stability of the transducer and the influence of parasitic components will be considered in the uncertainty budget. The influence of temperature will also be considered, as well as the rotation effect caused by parasitic forces. For dynamic forces the frequency response of the force measuring devices will be considered in a dynamic model. Based on the results of Task 2.1 and Task 2.2, the digital twin of a force measuring devices will be developed (Task 2.3).
WP3: Traceability chain for static and continuous force
The aim of this work package is to develop a traceability chain for static and continuous force measurement for metrological services in the fields of material testing and other mechanical test facilities. The currently available traceability chain covers only uniaxial static forces, applied perfectly, at constant temperature, to test specimens that react in a purely axisymmetric manner. This is not how systems perform in practice, where there are additional effects due to short term creep, hysteresis, temperature, data synchronisation, instrumentation, alignment and non-axial force application. The first two tasks will investigate the influences of these effects (Task 3.1 will investigate short term creep, hysteresis, temperature, data synchronisation and instrumentation, whereas Task 3.2 will investigate alignment and non-axial force application) on the measurement results obtained from a specific materials test (the ISO 6892 series of tensile tests) while also considering other types of test (e.g. hardness). In Task 3.3 the effect of a continuous application of force throughout a materials test will also be investigated. In Task 3.4 a model with associated uncertainty estimations will be developed. Task 3.5 will result in a calibration procedure to cover the production of static and continuous forces by industrial machines. The work package will also investigate traceability requirements for tests in which more than one force (or moment) component is required, i.e. multicomponent testing (Task 3.6).
WP4: Traceability chain for dynamic forces
The aim of this work package is to develop a traceability chain for dynamic force measurement for metrological services in the field of material testing. Firstly, a measurement procedure for dynamic measurements in testing machines will be developed (Task 4.1). In Task 4.2, compensation techniques for inertial forces will be considered. This will then feed into the development of a model for the dynamic force measurement in applications with an estimation of the measurement uncertainty (Task 4.3) and will result in a traceability chain for dynamic force measurement for metrological services for the dynamic calibration of material testing machines in the frequency range (from 0 Hz to 1000 Hz) which can be used for forces in the range from 1 N to 2 MN.
WP5: Comprehensive procedures and recommendations for force metrological services
The aim of this work package is to develop guidelines for the improved dissemination of the force unit especially for the field of material testing. These guidelines will be developed for at least two types of calibration (with continuous force (Task 5.1) and with dynamic force (Task 5.2). The final output of this work package (Task 5.3) will be a strategy for offering traceable calibration services for the force calibration of testing machines with continuous or dynamic force.
WP6: Creating impact
The tasks of this work package are:
- Task 6.1 Knowledge transfer
- Task 6.2 Training
- Task 6.3 Uptake and exploitation
WP7: Management and coordination
The tasks of this work package are:
- Task 7.1: Project management
- Task 7.2: Project meetings
- Task 7.3: Project reporting