Abstract
An impact test equipment was developed to measure the strength of adhesive resins subjected to impact loads at low temperatures. The stress wave propagating the adhesive layer and the adherend was analyzed by the one-dimensional elastic wave theory. It was confirmed that the average stress value in the adhesive layer could be evaluated by the stress value of the adherend. Therefore, the measurement method with this equipment is effective. The impact strength of an acrylic adhesive was evaluated using the developed test equipment. As a result of the impact test, the impact strength of the acrylic adhesive increased once with temperature decrease. However, when the temperature decreased lower than a specific value, the impact strength decreased. It was considered that this phenomenon occurs because the adhesive becomes brittle as the temperature decrease.
