ANALYSIS OF HANDLING CRITERION

Abstract

The following four hypotheses are presented for defining “handling” or “feeling”. (1) Handling criterion is used for many materials which are used for wearing or, if not, which have frequent chances of being touched by hand or by any other portions of the human body, (2) the main subject for the criterion is the mechanical properties of material, (3) the true judge of the criterion is the man who well knows about the mechanical properties relating with its end use, (4) the criterion depends on whether or not the mechanical properties are adequate for its usage.
It was discussed whether the criterion can be determined without human feeling following the hypotheses.
It is concluded that numerical evaluation of the mechanical properties is difficult at this stage because of its complex nonlinear properties. And author maintains that some careful checks of the nonlinear properties are important and effective to identify the handling grade of the tested material.
Some experiments have been done as an example of the above proposed method.