Durability and safety of adhesively bonded joints are of major importance in structural applications. The probability of failure of a bonded assembly after a certain period of time may be influenced by various aging effects including e.g. temperature and humidity. The correlation of results obtained from accelerated laboratory aging tests to long-term aging under service conditions often remains an unsolved challenge. In the present work, computer-based tools for non-linear regression analysis, estimation of reliability and lifetime prediction have been applied to experimental results obtained by accelerated aging of adhesively bonded shear specimens. Results obtained with an epoxy based adhesive and a hot-dipped galvanized steel as adherend are discussed. The modeling of the aging behavior is performed with combined functions referring to the EYRING as well as the PECK model which both appear appropriate for describing the experimental data. The safety prediction, based on the probability of failure as well as the safety factor β, is performed by using the EYRING model which fits the experimental data in a more conservative manner.

中文翻译：

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有害使用条件下胶粘接头的安全性

胶接接头的耐用性和安全性在结构应用中至关重要。在一定时间后，粘合组件失效的可能性可能会受到各种老化影响的影响，例如温度和湿度。从加速的实验室老化测试获得的结果与使用条件下的长期老化之间的相关性通常仍然是未解决的挑战。在目前的工作中，用于非线性回归分析，可靠性评估和寿命预测的基于计算机的工具已应用于通过加速粘结试样的老化而获得的实验结果。讨论了使用环氧基粘合剂和热浸镀锌钢板作为被粘物的结果。通过参考EYRING和PECK模型的组合函数执行老化行为的建模，这两种函数都适合描述实验数据。基于故障概率以及安全系数β的安全性预测是通过使用EYRING模型进行的，该模型以更为保守的方式拟合实验数据。