ASTM G – Free download as PDF File .pdf), Text File .txt) or read online for free. ASTM G 2. Referenced Documents ASTM Standards: B Test Method for Dynamic Coefficient of Friction and. Wear of Sintered Metal Friction Materials Under Dry. ASTM G Standard Guide for Measuring and Reporting Friction Coefficients.
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Please download to get full document. A number in parentheses indicates the year of last reapproval. A superscript epsilon e indicates an editorial change asgm the last revision or reapproval. All materials on our website are shared by users.
If you have any questions about copyright issues, please report us to resolve them. We are always happy to assist you. 1g15 epsilon e indicates an editorial change since the last revision or reapproval. Requirements for minimum data and a format for present-ing these data are suggested.
It is hoped that the use of auniform reporting format will provide the basis for the prepa-ration of handbooks and computerized databases. Current edition approved October 10, Adtm as G – Last previous edition G – 93 e 1.
ASTM Gpdf – Documents
G 40— g1115 3. The usual manifestation is a cycling decrease andsubsequent increase in the friction force as sliding proceeds Fig. Each triboelementcontains one or more tribosurfaces. G 40 — Summary of Guide 4.
Any of the listed tests or other acceptedtests may be used. General friction testing precautions are citedand a prescribed method of recording friction data is recom-mended. This guide is intended to promote the use of thisstandard reporting g115 and standard friction test methods.
The overall goal of this guide is to astk a reporting formatthat will enable computer databases to be readily established. These databases can be searched for material couples andtribosystems of interest. Weartest machines are often equipped with sensors to measurefriction forces also.
The appropriate device to use is the onethat closely simulates a tribosystem of interest.
Other ashm factors to simulate arenormal force contact pressurevelocity, type of motion reciprocating versus unidirectional and environment.
If an application involves materialssuch as friction composites, one of the brake type dynamom-eter tests may be appropriate. This breakaway force is commonlyused to calculate static friction Fig. In this case an elastic frictionmeasuring system would be appropriate.
When pulling a steelcable over the same roll, it would be more appropriate to use astiff testing system. In addition, elastic beams containing straingages may produce different friction responses than a more rigid load celleven if used on the same friction testing machine. Test surfaces that are prone to blocking or interlock-ing of surface features are particularly prone to showing abreakaway force spike.
Blocking is a term used to describe thetendency of asm plastic materials to stick to each other afterlong periods of contact. Plasticizer migration can be the cause. Standard Costing Jul 25, April Current version: Friction Wear Force Abrasive Shoe. We Need Your Support. Thank you for visiting our website and your interest in our free products and services. We are nonprofit website to share and download documents. To the running of this website, we need your help to support us.