The engineer describes the mechanical behavior of materials and components by means of quantitative parameters that can be determined by measurement under defined conditions, such as strength, deformability and weight. In the case of adhesive bonds, it is advisable to distinguish between the mechanical behavior as a function oftime and temperature on the one hand, and the durability as a function
Figure 7.26 Nondestructive testing by ultrasound thermography (magnitude image of a car door). |
of the environmental conditions on the other hand (see Section 7.5). In the following sections, some examples will be presented to illustrate the major strengths and deformability characteristics of adhesive bonds as a function of the time period during which they are submitted to a load, and the temperature. Until now, with regards to the properties of adhesive bonds, neither a systematic catalogue nor standardization is available. The reasons for this are provided in the following sections.
7.7.1