{
  "$type": "site.standard.document",
  "description": "A method for estimating a tire wear life which comprises: a step of pressing at least one of a road surface simulation member and a rotatable rubber test piece against the other of the road surface simulation member and the rotatable rubber test piece such that the road surface simulation member…",
  "path": "/patents/1086524",
  "publishedAt": "2004-06-16T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60C11/24",
    "BRIDGESTONE CORP [JP]"
  ],
  "textContent": "A method for estimating a tire wear life which comprises: a step of pressing at least one of a road surface simulation member and a rotatable rubber test piece against the other of the road surface simulation member and the rotatable rubber test piece such that the road surface simulation member and the rubber test piece are in a pressed state, and driving the rubber test piece to rotate; a step of measuring a radius (Rr) of the rubber test piece at the side thereof which presses the side of pressing the road surface simulation member when the rubber test piece is pressed against the road surface simulation member and rotated and/or when the road surface simulation member is pressed against the rubber test piece; a step of adjusting, on the basis of the measured radius of the rubber test piece, the slip rate of the rubber test piece such that the rubber test piece is rotated at a slip rate which is in the range of 0.5% to 5%; a step of rotating the rubber test piece freely with respect to the road surface simulation member; a stepof measuring a longitudinal force when the rubber test piece is rotated at a slip rate which is in the range of 0.5% to 5% and a longitudinal force when the rubber test piece is rotated freely with respect to the road surface simulation member, the longitudinal force being defined as a force in a direction tangential to the plane of contact between the road surface simulation member and the rubber test piece; and a step of obtaining a degree of rubber wear (V) from values including a friction energy (ew) obtained on the basis of each of the detected longitudinal forces and the slip rate.",
  "title": "Method for estimating a tire wear life"
}