Question

A steel rail is 12 m long and is laid at a temperature of 18°C. The maximum temperature expected is 40°C. Calculate the temperature stresses developed in the rails, if:(a) No expansion joint is provided. Take E = 2 × 10^5 N/mm2 and α = 12 × 10–6/°C

Answer 1

Answer:

Explanation:

A steel rail is 12 m long and is laid at a temperature of 18°C. The maximum temperature expected is 40°C.  

(i) Estimate the minimum gap between two rails to be left so that the temperature stresses do not develop.  

(ii) Calculate the temperature stresses developed in the rails, if:  

(a) No expansion joint is provided.  

(b) If a 1.5 mm gap is provided for expansion.  

(iii) If the stress developed is 20 N/mm2 , what is the gap provided between the rails? Take E = 2 × 105 N/mm2 and α = 12 × 10–6/°C.