Abstract
By using the incremental finite element method with triangular plane elements, the snap-through action problems due to thermal expansion of the unit arch spring and the complex ones are analyzed. Then, for the purpose of analyzing the action of the bimetallic arch spring as a typical example of these springs, an effective method with beam-column elements is proposed. The latter method is applied in analyses of the thermal snap-through action of the U- and W-type bimetallic springs for thermoswitches. Then by examining several numerical results by the method of experimental designs, some design formulae for the U-type bimetallic spring are obtained.
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