Abstract This paper focuses on an experimental investigation of the mechanical behavior of bolted joints. A new test apparatus to measure friction hysteresis was designed to provide a reliable experimental database for the calibration of contact models. This apparatus uses a piezoelectric actuator to provide the contact interfaces with stable oscillatory relative displacement. The friction force and the bolt preload were continuously measured during the test, using a load cell and a force washer, respectively. The relative motion between the interfaces was measured using a single laser vibrometer. The influence of the bolt preload and excitation amplitude on friction hysteresis was investigated. A numerical model was developed to extract the tangential contact stiffness from the measured data.

中文翻译：

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一种测量螺栓连接摩擦滞后的微动试验装置

摘要 本文重点研究螺栓连接的力学行为。设计了一种测量摩擦滞后的新测试装置，为接触模型的校准提供可靠的实验数据库。该装置使用压电致动器为接触界面提供稳定的振荡相对位移。摩擦力和螺栓预紧力在测试过程中连续测量，分别使用称重传感器和力垫圈。使用单个激光测振仪测量界面之间的相对运动。研究了螺栓预紧力和激励幅度对摩擦滞后的影响。开发了一个数值模型以从测量数据中提取切向接触刚度。