SITUATION 1:A steel rod 2.5 m long is securedbetween two walls. If the load on therod is zero at 20°C,1. Compute the stress when thetemperature drops to -20°C. The cross-sectional area of the rod is 1200 mm?,a = 11.7 um/(m-°C), and E = 200 GPa.Solve, assuming that the walls are rigidas the temperature dropsa. 93.6 MPac. 75.6 MPab. 89.6 MPad. 53.6 MPa2. Compute the stress when thetemperature drops to -20°C. The cross-sectional area of the rod is 1200 mm²,a = 11.7 um/(m-°C), and E = 200 GPa.Solve, assuming that the walls springtogether a total distance of 0.500 mmas the temperature drops.a. 93.6 MPac. 75.6 MPab. 89.6 MPad. 53.6 MPa

Given data : E=200 GPaα=11.7×10-6 per ∘CInitial temperature (T1)=20∘ CFinal temperature (T2)=-20∘…

Answered: SITUATION 1: A steel rod 2.5 m long is…

Engineering

Civil Engineering

SITUATION 1: A steel rod 2.5 m long is secured between two walls. If the load on the rod is zero at 20°C,

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Concept explainers

System of Forces

A force is an external influence or agent that changes the state of a system. According to Newton's second law, the force applied to a body is proportional to the change in momentum of a body. Hence, whenever a force is applied to a body, its momentum changes. If the body is at rest, under the action of force, its state of rest changes to motion. In other words, the magnitude of the momentum of the body changes from zero to a measurable value. Similarly, if the body possesses some initial velocity, it has some associated momentum, the effect of force can cause the body to halt or come to rest, that is, the momentum reduces to zero.

Question

SITUATION 1:
A steel rod 2.5 m long is secured
between two walls. If the load on the
rod is zero at 20°C,
1. Compute the stress when the
temperature drops to -20°C. The cross-
sectional area of the rod is 1200 mm?,
a = 11.7 um/(m-°C), and E = 200 GPa.
Solve, assuming that the walls are rigid
as the temperature drops
a. 93.6 MPa
c. 75.6 MPa
b. 89.6 MPa
d. 53.6 MPa
2. Compute the stress when the
temperature drops to -20°C. The cross-
sectional area of the rod is 1200 mm²,
a = 11.7 um/(m-°C), and E = 200 GPa.
Solve, assuming that the walls spring
together a total distance of 0.500 mm
as the temperature drops.
a. 93.6 MPa
c. 75.6 MPa
b. 89.6 MPa
d. 53.6 MPa

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