A Guide to Understanding Yield Stress Measurements
The term ‘yield stress characteristic’ relates to a property present in a number of complex viscous fluids, whereby the liquid is unable to flow unless the stress applied exceeds a certain pressure.
This is evident in everyday tasks such as squeezing toothpaste from a tube or dispensing ketchup from a bottle, but is important across a whole range of industries and applications.
The determination of a yield stress as a true material constant can be difficult as the measured value can be very much dependent on the measurement technique employed and the conditions of the test, of which there are many.
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