TANGENTIAL FORCE IMPARTING DEVICE AND FATIGUE TEST SYSTEM

To provide a tangential force imparting device capable of applying tangential force to a test piece during a fatigue test, and a fatigue test system equipped with the tangential force imparting device.SOLUTION: A tangential force imparting device includes a friction material, a pressing member, a driving mechanism, a holding part, a connection part for connecting the driving mechanism and the holding part, and a first supporting part for supporting the connection part. The friction material comes into contact with a plate-like test piece held in a fatigue test device from one side in a thickness direction of the test piece. The pressing member comes into contact with the test piece from the other side in the thickness direction. The driving mechanism is connected to the friction material at one side of the test piece and rotates the friction material. The holding part holds the pressing member at the other side of the test piece. A rotation center of the friction material is away from a center in a width direction of the test piece. The connection part includes a biasing part that biases the driving mechanism and the holding part in a direction toward each other. The first support part includes a main body and a first guide part. The first guide part supports the connection part so that the connection part can move in the thickness direction with respect to the main body.SELECTED DRAWING: Figure 3 【課題】疲労試験中の試験片に対して接線力を付与することができる接線力付与装置、およびそれを備えた疲労試験システムを提供する。【解決手段】接線力付与装置は、疲労試験装置に保持された板状の試験片に試験片の厚み方向における一方側から接触する摩擦材と、前記厚み方向における他方側から試験片に接触する押し部材と、試験片よりも前記一方側において摩擦材に連結されかつ摩擦材を回転させる駆動機構と、試験片よりも前記他方側において押し部材を保持する保持部と、駆動機構と保持部とを連結する連結部と、連結部を支持する第１支持部とを備える。摩擦材の回転中心は、試験片の幅方向における中心から離れており、連結部は、駆動機構および保持部を互いに近付く方向に付勢する付勢部を有し、第１支持部は、本体部と、本体部に対して連結部が前記厚み方向に相対的に移動できるように連結部を支持する第１ガイド部とを有する。【選択図】 図３