Abstract:
The purposes of the research were to design and evaluate the demonstration set of stress field by
mean of photoelasticity, to study and qualitatively compare the stress fields obtained from the
simulation and experiment using the developed demonstration set, to evaluate the quality of the
demonstration set, and to evaluate the satisfaction of the participants toward the demonstration set.
Questionnaires for evaluation of the quality and participants' satisfaction were conducted for data
collection. 3 experts on the field of applied mechanics and/or stress analysis and the satisfaction
evaluated the quality and 30 participants (4th year undergraduate student of Mechanical Technology
Education department, Faculty of Industrial Education, King Mongkut's University of Technology
Thonburi, who have learned the contents of Mechanics of Materials and/or Design of Machine
Element on the academic year 2010) evaluated the satisfaction. Collected data was analyzed using
simple descriptive statistics. The findings showed that the experimentally obtained stress field of the
circular disk under diametral compression agreed well with that obtained from the simulation. In
case of the stress fields of 4 models, i.e., a plate, a plate with a circular hole at its center, a
rectangular bar, and a hook, they conformed to the theories including the stress concentration, the
residual stress, and the contact stress. Furthermore, results revealed that the demonstration set had
high quality and the participants provided high satisfaction. Therefore, the demonstration set could
be used as a classroom media.