Fixed-Fixed bar was 20 centigrade degree at room temperature, Determine the thermal stress when the bar is heated to :110 degree A Lo Est = 200 Gpa ast 11.7 μm/m°C 200 mm² Ast = + 210.6 MPa (compression) O + 210.6 MPa (Tension) O _187.2 MPa (compression) +187.2 MPa (Tension) _187.2 MPa (Tension) _210.6 MPa (Tension) +187.2 MPa (compression) _210.6 MPa (compression)

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Temperature Difference and Heat Transfer

Whenever there is a flow of heat flux resulting from a temperature gradient within the material or between two materials, there is heat transfer. Heat transfer primarily arises due to temperature differences between two bodies or within bodies. The term temperature gradient denotes temperature differences or variation of temperature due to change in some quantity. The fundamental use of the concept of temperature is found in the zeroth law of thermodynamics.