1、Designation: F2838 10Standard Practice forAccelerated Laboratory Aging of Radial Passenger Car andLight Truck Tires through Load Range E for the LaboratoryGeneration of Belt Separation1This standard is issued under the fixed designation F2838; the number immediately following the designation indicat
2、es the year oforiginal adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This practice describes a method to laborator
3、y age a newtire in an oven to produce changes in certain chemical andphysical properties at the belt edges similar to those of tiresin-service (see Appendix X1).1.2 This practice is a precursor to conducting an ASTMstandard roadwheel test method for laboratory generation ofbelt separation in radial
4、passenger car and light truck tires.1.3 This practice may not produce representative chemicaland physical property changes in any part of the tire except thebelt edge.1.4 The values stated in SI units are to be regarded as thestandard. The values given in parentheses are for informationonly.1.5 This
5、 standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use. For specificprecaution
6、ary statements, see Section 8.2. Referenced Documents2.1 ASTM Standards:2ASTM SI10 - 02 IEEE/ASTM SI 10 American NationalStandard for Use of the International System of Units (SI):The Modern Metric SystemF538 Terminology Relating to the Characteristics and Per-formance of TiresG128 Guide for Control
7、 of Hazards and Risks in OxygenEnriched Systems2.2 Other Standards:ANSI/ISO/IEC 17025 General requirements for the compe-tence of testing and calibration laboratories3Compressed Gas Association (CGA) Standard for ValveConnections V-14EIGA IGA 04/09/E Fire Hazards of Oxygen and OxygenEnriched Atmosph
8、eresRMA Volume 4 Tire Service Manual5Tire and Rim Association (T belt separation; durabil-ity; endurance; oven; oven aging; oxygen-nitrogen gas mix-ture; roadwheel; tire; tire oven agingANNEX(Mandatory Information)A1. TIRE OVEN AGING DATA LOGA1.1 See Table A1.1.TABLE 2 Storage ConditionsNOTEDo not e
9、xceed tire sidewall maximum pressure.Storage InflationPassenger Tires 140 kPa (20 psi)Light Truck Tires 240 kPa (35 psi)F2838 104APPENDIXES(Nonmandatory Information)X1. NHTSA PHOENIX TIRE AGING STUDYX1.1 Tire material properties were obtained from datagenerated in the NHTSA Phoenix Tire Aging Study,
10、 Phase 1.For the tire types studied by ASTM in the ASTM program, theavailable NHTSA Phoenix Tire Aging Study material propertydata was used, which consisted exclusively of data collectedfrom tires in on-road positions.X2. BACKGROUNDX2.1 The United States Congress passed the TransportationRecall Enha
11、ncement, Accountability and Documentation(TREAD) Act in November 2000. Included in the Act werespecific directions to the National Highway Traffic SafetyAdministration (NHTSA) to upgrade tire safety standards.X2.2 As tire wear life has increased over the years, interestin the aging of a tires intern
12、al components has increased. “some members of Congress expressed the view that there is aneed for an aging test to be conducted on light vehicle tires.The agency tentatively concludes that we agree there is a needfor an aging test in the proposed light vehicle tire standardbecause most tire failures
13、 occur at mileages well beyond 2,720kilometers (1,700 miles) to which tires are exposed in thecurrent FMVSS No. 109 Endurance Test.” The ASTM F09.30Subcommittees goal was to develop a scientifically valid,short duration aged tire durability test standard, which corre-lates to in-service aging. Short
14、 duration is defined as theminimum duration test possible which correlates to the agedstate and mechanisms driving this state. The scope of this workis limited to radial passenger car and light truck tires throughLoad Range E. This standards development subcommitteeconducted research in order to det
15、ermine appropriate acceler-ated laboratory aging conditions which correlate materialproperty changes produced in the laboratory with those ob-served in service. The ASTM Subcommittee defined multipleresearch steps to follow in the development of the test standard.The research was developed to evalua
16、te means to conductaccelerated laboratory aging of tires and considered bothstatically aging tires in an oven as well as dynamically agingtires on a roadwheel. The conclusion of the research was thattires should be statically aged in an oven within a specifiedrange of times and temperatures.TABLE A1
17、.1 Tire Oven Aging Data LogOven TemperatureSet PointOven Number/IDSpecified Cold InflationPressureHot Inflation PressureSettingTire IDTemperature Monitor IDDate Time Technician ID MeasuredOvenTemperatureMeasured InflationPressure as Found(60 to 80 min afterremoval from oven)APressure AdjustedToStart
18、4to8h1 week3 weeks5 weeks7 weeksObservations/CommentsAAfter one, three, and five weeks of laboratory oven aging. Upon test completion wait 3 h for complete cool down.F2838 105RELATED MATERIALSatterfield, J., “Overview of Aged Tire Durability Standard Develop-ment,” SAE Session Code: AC4 Presentation
19、 No. 2008-01-1489, Apr.14, 2008.McNutt, J., Waddell, W., and Kohler, J., “Development for an Aged TireDurability Standard -Accelerated Laboratory StaticAging,” SAE PaperNo. 2008-01-1493.McNutt, J., Waddell, W., and Kohler, J., “Development for an Aged TireDurability Standard - Accelerated Laboratory
20、 Dynamic Aging,” SAEPaper No. 2008-01-0149.Waddell, W., Kohler, J., and McNutt, J., “Development for an Aged TireDurability Standard - Determination of Time and Temperature Param-eters for Accelerated Laboratory Static Aging,” SAE Paper No. 2008-01-1492.Kohler, J., McNutt, J., and Waddell, W., “Deve
21、lopment for an Aged TireDurability Standard - Reinflation Study for Accelerated LaboratoryAging,” SAE Paper No. 2008-01-1491.Stalnaker, D.O., Altman, R.G., Howland, D.L., and Popio, J.A., “Devel-opment for an Aged Tire Durability Standard - Stepped-up LoadRoadwheel Evaluation,” SAE Paper No. 2008-01
22、-150.Altman, G., Howland, D.L., Popio, J.A., and Stalnaker, D.O., “Develop-ment for an Aged Tire Durability Standard - Rationale for Steady StateDOE,” SAE Paper No. 2008-01-1495.Altman, G., Howland, D.L., Popio, J.A., and Stalnaker, D.O., “Develop-ment for an Aged Tire Durability Standard - Steady S
23、tate DOE,” SAEPaper No. 2008-01-1493.Altman, G., Howland, D.L., Popio, J.A., and Stalnaker, D.O., “Develop-ment of an Aged Tire Durability Standard - Comparison of Stepped-UpLoad and Steady State DOE Results,” SAE Paper No. 2008-01-1494.Docket NHTSA-2005-21276 -ASTM Technical Papers Phase 1 Close-ou
24、tReport, Phase 2 Close-out Report, and Validation Phase SummaryReport.Bridgestone United States Patent Number 6,119,513 of September 19,2000.Federal Register Vol. 67, No 43, Tuesday, March 5, 2002 page 10068,Paragraph 6, “Aging Effects.”ASTM International takes no position respecting the validity of
25、 any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to
26、revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Y
27、our comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is co
28、pyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).F2838 106
