Page 116 - Mechanical Behavior of Materials

Problems and Questions 117

P
h
t
L

v max

Figure P3.19

Table 3.13, consider making the beam from one of three materials, AISI 4340 steel, 7075-T6
Al, or glass–epoxy composite.
(a) What beam size h 2 is required for each material to meet the X = 3 requirement?
(b) What size h 2 is required for each material to avoid a deflection greater than 25 mm?
(c) Considering both requirements, what is the required size h 2 for each choice of material?
(d) Which choice of material is the most economical? The lightest weight?

Section 3.9
3.21 Examine a bicycle and attempt to identify the materials used for six different parts. How is
each material appropriate for use in the part where it is found? (You may wish to visit a bicycle
shop or consult a book on bicycling.)
3.22 Look at one or more catalogs that include toys, sports equipment, tools, or appliances. Make
a list of the materials named, and guess at a more precise identification where trade names or
abbreviated names are used. Are any composite materials identified?