Question

Consider 2 metallic strips

[e]. Consider 2 metallic strips A (top) and B (bottom) of identical length (), width (w) and thickness (see the sketch below). Strip A has a higher coefficient of thermal expansion compared to strip B. The strips are bonded together and the temperature is raised by AT 0. What shape will the two strips take? Show it with a sketch. Also, will they have thermal stresses? If so, specify the stress state in each strip. When attempting this problem, assume that dimensions w and i are much smaller compared to l [f. Following stress distribution results from Hertz theory for two cylinders in contact and subjected to loading perpendicular to the contact surface 1.0 0.8 04 0.2 Distance from contact surface Show a 3D stress element and corresponding Mohr's circle for the stress components corresponding to (i) z/b < 0.436 and (ii) zb> 0.436 where z/b value of 0.436 corresponds to the intersection of σ, and ơy Curves.

Answer 1

ZZZZ.LTZZZZ When tomperdure increases boh to strips 41 V inke A s Strip A wil tend to Find Shape → Amhedion→ Binoehl1c Strips are usd as therm). Surthes Stress will be indote But in asethis bi netalic Strie Therml Stesss uillse indoed Stdt o Stres StripA → Compressive StripBTenbile