Page 104 - Handbook of Adhesives and Sealants
P. 104
72 Chapter Two
Figure 2.12 Thermal expansion coefficients of common materials. 18
stresses in the adhesive develop because the polyamide-imide sub-
strate wants to shrink to a greater extent than the steel. At ambient
room temperature, these stresses may be significant but not high
enough to cause adhesive failure. Further assume that the bonded
bearing is to be placed in service with operating temperatures that
will vary between 250 F and 40 F. At 250 F the internal stresses due
to the miss-match in thermal expansion are reduced to zero, since we
are back at the equilibrium condition (assuming that there was no
