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More speakers have been announced for the ‘Symposium on the Fatigue Testing of Hair’, which takes place on Thursday 15th May. These include Dr Rebecca Lunn from Dia-Stron Ltd (UK), and Dr Jennifer Marsh from Procter & Gamble (USA). This event, co-organized with Dia-Stron Ltd, will be a hybrid event. A very limited number of places are available to join the symposium live at TRI. There are, of course, unlimited paces on-line, and the event will be streamed live, and on playback as usual.
Dr Rebecca Lunn will be present a talk titled ‘Cyclic fatigue Measurements in the Cosmetics Industry: How to Measure and What it Tells Us’. The abstract reads as follows:
Cyclic loading and unloading generally leads to fatigue failures. Understanding the fatigue of materials when subjected to repeated load cycles provides insightful knowledge about fracture and failure mechanisms. Such information has become essential in the development and manufacture of products ranging from airplanes to car tyres. The fatigue behaviour of fibres is well studied, encompassing both textile and technical fibres. The merit of fatigue testing has been recognised within the cosmetics industry and in recent years there has been an increasing usage of cyclic fatigue testing within the hair care sector.
Fatigue performance can be assessed in the laboratory by cyclically tensioning, buckling, twisting a fibre either as a single mode of deformation or a combination of modes. The Dia-Stron range of cyclic fatigue instruments deform fibres through cyclic tensioning and tension-buckling.
The fibres can be subjected to either a constant load, constant stress or constant strain and the number of cycles for the fibre to break is recorded. In addition, the elastic modulus and the energy of loading and unloading are also recorded. This presentation will focus on the instrument metrology, the factors which affect the response of instrument and what considerations should be made with regards to the interpretation of the instrumental data.
Dr Jennifer Marsh will present a talk titled ‘New Insights from Fatigue Measurements of Consumer Hair & Correlation with Other Damage Measures’. The abstract reads as follows:
In this talk we will share fatigue data collected from consumers in China and US. The fatigue data has been correlated with other damage methods and visualizations of hair structure. From this work we will share our insights on the importance of protein and lipid changes to fatigue strength.
For more information and to register, click here