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Design for Impact Loads


Design methods of adhesively bonded joints subjected to impact loading are discussed in this chapter. Methodologies to treat the dynamic responses of structures are shown. In these cases, it is necessary to analyze the stress distribution considering stress wave propagation because inertia effects of the structures are more significant than those in quasi static conditions. Constitutive relations of materials are discussed. The relations are highly dependent to the stress and strain rates. Thus, the dependence should be considered for the dynamic analysis of materials. Some examples of stress analysis are shown, where closed-form approaches and dynamic finite element analyses are explained. In addition, an actual application, a crash problem of car structures, is explained because adhesively bonded joints have been recently introduced to car structures and the design of the joints subjected to impact loads has become very important.