FRETTING FATIGUE TEST APPARATUS AND METHOD FOR STEEL WIRE UNDER RADIAL IMPACT CONDITION

摘要

A fretting fatigue test apparatus and method for a steel wire under a radial impact condition. The test apparatus comprises a test bench (16) and an axial steel wire (14); the two ends of the axial steel wire (14) are separately provided with a steel wire tensioning and stretching device; the middle position of the axial steel wire (14) is provided with a radial contact device, an impact device, and a spring reset device; by making the axial steel wire (14) radially contact with a contact steel wire (17), an impact condition is simulated, the contact portion of the axial steel wire (14) is radially impacted, an impacted radial contact device is reset, the same contact position is repeatedly impacted, and impact displacement is measured by means of a displacement sensor (15). The axial steel wires (14) on steel wire fixing clamps (4) are symmetrically and parallelly assembled so as to meet a contact condition; the contact between the steel wires is guaranteed by the tension force of the spring of the spring rest device; by adjusting a distance between the spring (8) and a guide rail sliding block (9), the tension force of the spring contacting with the two sides of the axial steel wire (14) can be controlled; by changing the position of the impact device, the fretting fatigue of the steel wire can be researched under the impact states of different positions.