Question

The switch shown is designed to close as the temperature rises causing AB and CD to expand and making point E come in contact with point F. Arm AB is made of steel with a CTE of ast12x106 /oC, and arm CD is made of aluminum with a CTE of aal = 24x10-6 /°C, At 20 °C, arm BDE is vertical as shown. Determine the required gap, s, (at 20 °C) if the switch is to close at 110 C, knowing that LB 400 mm and LDE-190 mm. Express your answer in mm to the nearest 0.001 mm. BD 300 mm

Answer 1