A bar made from aluminum (E = 72 GPa) has a diameter of 12 mm. When the bar is subjected to a tensile axial force P, its diameter is decreased by 0.018 mm. Assume the Poisson’s ratio to be 0.33. Determine the value of loads P and its axial deformation. P = ? N δ = ? mm

Q: SITUATION. As shown in the figure below, a rigid bar with negligible mass is pinned at O and…

A:

Q: SITUATION. As shown in the figure below, a rigid bar with negligible mass is pinned at O and…

A:

Q: Three round bars welded together axially loaded as shown. Find the normal are stress in each bar if…

A: Stress is defined as the force acting per unit area of a bar. The stress in a bar is directly…

Q: The bronze bar 3 m long with a cross-sectional area of 350 mm? is placed between two rigid walls. At…

A: Given, l=3 mA=350 mm2T1=-20° Cδ=2.2 mmα=18×10-6 /° CE=80GPaσ= 30 MPa

Material Properties

Construction in civil engineering demands high strength, durability, and longevity. These targets can be achieved by better design and analysis, along with the correct choice of materials. Different materials have different properties and hence, they respond and performs differently under the various condition of external loadings. It is therefore a critical task of an engineer to select the right material based on the property that the material is supposed to function in real-time. When speaking about the property, there are different categories of material properties like chemical property, physical property, mechanical property, electrical property, magnetic property, thermal property, etc. These material properties form the basis of material selection in various applications.