E10.13 Selection of material and shape to suppress buckling. Cylindrical tubing is available from stock in the following materials and sizes. Use this information and the material index to identify the best stock material for the stalk of the stand shown in Figure E10.9. Material Aluminum alloys Steel Copper alloys Polycarbonate (PC) Various woods Modulus E (GPa) 69 210 120 3.0 7-12 Tube radius Wall thickness/tube radlus, t/r r 25 mm 30 mm 20 mm 20 mm 40 mm 0.07 to 0.25 0.045 to 0.1 0.075 to 0.1 0.15 to 0.3 Solid circular sections only

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Analysis and Procedures for Material Selection

The term material selection means to select the right material for various engineering applications. There are various engineering materials available and each has different individual properties. Thorough knowledge of the material properties and behavior is crucial in the design process. For instance, a structural member, such as a beam, is used to support vertical shear loads by the building itself. To withstand such loads, the material of the beam must possess adequate strength and stiffness to resist any deformation that might lead to the formation of cracks.