Optical metrology for strain measurement
Designers of parts and structures that are subject to load and stress normally aim to use materials and energy in the most cost-effective way. In addition to this, the more advanced the material used, the higher the degree of the induced complexity. On the basis of a non-contacting approach, optical strain measurement techniques enable the assessment of engineering artifacts subject to in-service loading. Optical methods of strain measurements focus on the removal of uncertainties with the aid of detailed comprehensible stress data. This data enables the design of more reliable, safer, lighter and stronger products and devices with less uncertainty. The optimised designs do not involve any unnecessary material waste, which is particularly important for a wide range of industries including aerospace, automotive and biomedical applications. Urged by this, the SPOTS project provided a better insight to the standards and reference materials used for realising the full potential of the optical strain measurement technology. Key project results include optimised methodologies, physical and virtual reference materials as well as recommendations for traceability routes. The use of accepted standards and calibrations results in rigorous strain datasets and thus, enhances confidence in the measurement procedures. For further information click at: http://www.opticalstrain.org/
