A steel bar, 300 mm long and 24 mm diameter, is turned down to 18 mm diameter for one third of its length. It is heated 30°C above room temperature, clamped at both end and then allowed to cool to room temperature. If the distance between the clamps is unchanged, the maximum stress in the bar (a = 12.5x10-° per °C & E=200 GN/m2 is) %3D (a) 25 MN/m² (b) 50 MN/m2 (s) (c) 75 MN/m² (d) 100 MN/m2 47

Q: why is P positive for stress A

A: The compressive stress is considered as positive and tensile stress is considered as negative.

Q: 3 MPa. Which of the following describes the stress state? A body is subjected to the following…

A: in question stress in various plane is given:  question is asking about stress state: given: SIGMAxx…

Q: Example: the low cycle fatigue of a certain steel is given by life cycle equation-2: (of/E)=0.005…

A: The fatigue strength of steel /Modulus of elasticity(E), The fatigue Ductility coefficient is, The…

Q: Calculate the normal stress in the brass rod in MPa. Calculate the normal stress in the bronze rod…

A:

Q: 1

A: Given data:- Moment about a horizontal axis on the cross section is 0.80 kN-m

Q: An assembly of a material consists of a brass shell fully bonded to a ceramic core. The brass shell…

A:

Q: Fc FA Fa Fc

A: According to given data Fa , Fb , Fc principal stresses are shown in three elements  We need to…

Q: The brass shell (ab = 20.9 × 10-6/°C) is fully bonded to the steel core (as = 11.7 × 10-6°C).…

A: Step 1:Step 2:

Q: A 0.35-m long steel rod with a round cross-section (25 mm) is resting on a frictionless surface. The…

A: The given data is: Length of steel rod (L) = 0.35 m Diameter of steel rod (d) = 25 mm Coefficient of…

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.