A soda-lime glass tube made out of the material in Figure 9.3 is in service in a chemical-processing plant at 395°C, and it is subject to a tensile stress of 10 MPa. The elastic modulus of the glass at this temperature is equal to 40 GPa. Use a Maxwell solid model to answer the following, and assume that the glass behaves as a Newtonian fluid (n=1).
(a) At the instant the glass tube is placed in service, at t=0, what is the strain of the tube?
(b) After one year of service, what is the total strain of the tube?
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