BULETINUL INSTITUTULUI POLITEHNIC DIN IAŞI - Universitatea ...

Bul. Inst. Polit. Iaşi, t. LVI (LX), f. 2, 2010 225
deflection (Fig. 4a) and for the von Misses stress on the active layer (Fig. 4b),
as well as for the passive layer (Fig. 4c)
a
b c
Fig. 4 – The influence of the length of the beams:
a – maximum deflection; b – von Misses stress for active layer;
c – von Misses stress for passive layer.
4. Conclusions
1. The width of the beams has a negligible influence on the maximum
deflection of the bimetallic strip. As far as the status of the stresses, it becomes
apparent that with width increasing, the von Misses stresses grow as well in
both the active and the passive layers. For the width of 7.5 mm, the von Misses
stresses are very close to the admissible values, even overcoming for a small
amount in the case of zinc material. Regardless of the value of the width of the
beams, for all combination of materials, the stress in the active layer is greater
than the passive layer.
2. The length of the beams is definitely affects the values of the maximum
deflection. The von Misses stresses are growing as well, but to a lesser extent
than the growth of the maximum deflection. And in this case, the von Misses
stress in the active layer is towards the passive layer.