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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Link to Active This link will always route to the current Active version of the standard. Friction Wear Force Abrasive Shoe.
The usual manifestation is a cycling decrease andsubsequent increase in the friction force as sliding proceeds Fig. Referenced Documents purchase separately The documents listed below are referenced within the subject standard asrm are not provided as part of the standard. This guide is intended to promote the use of thisstandard reporting system and standard friction test methods.
We Need Your Support. G 40— 93 asstm. Any of the listed tests or other acceptedtests may be used.
Historical Version s – view previous versions of standard. It is hoped that the use of auniform reporting format will provide the basis for the prepa-ration of handbooks and computerized databases. If an application involves materialssuch as friction composites, one of the brake type dynamom-eter tests may be appropriate. These databases can be searched for material couples andtribosystems of interest.
All materials on our website are shared by users. G 40 — Requirements for minimum data and a format for presenting these data are suggested.
April Current version: When pulling a steelcable over the same roll, it would be more appropriate to use astiff testing system.
Their use will significantly reduce the need for each laboratory to do its own testing. A superscript epsilon e indicates an editorial change since the last revision or reapproval. The overall goal of this guide is to provide atsm reporting formatthat will enable computer databases to be readily established.
ASTM G – 04 Standard Guide for Measuring and Reporting Friction Coefficients
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. Each triboelementcontains one or more tribosurfaces. No other units of measurement b115 included in this standard. These databases can be searched for material couples and tribosystems of interest. Summary of Guide 4.
Standard Guide for Measuring and Reporting Friction Coefficients
Plasticizer migration can be the cause. The overall goal of this guide is to provide a reporting format that will enable computer databases to be readily established. Weartest machines are often equipped with sensors to measurefriction forces also.
Standard Costing Jul 25, Blocking is a term used to describe thetendency of some plastic materials to stick to each other afterlong periods of contact.
To the running of this website, we need your help to support us. Sufficient information on test conditions will be available to determine applicability of the friction data to the engineer’s specific needs. Asuperscript epsilon e indicates an editorial change since the last revision or reapproval. This breakaway force is commonlyused to calculate static friction Fig. Last previous edition G – 93 e 1. The use of the suggested reporting form will increase the long-term usefulness of the test results within a given laboratory and will facilitate the exchange of test results between laboratories.
It is hoped that the use of a uniform reporting format will provide the basis for the preparation of handbooks and computerized databases. Originallypublished as G – The appropriate device to use is the onethat closely simulates a tribosystem of interest. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
Standard – Standard Guide for Measuring and Reporting Friction Coefficients ASTM G –
Please download to get full document. In this case an elastic frictionmeasuring system would be appropriate. Other important factors to simulate arenormal force contact pressurevelocity, type of motion reciprocating versus unidirectional and environment.
A number in parentheses indicates the year of last reapproval.
General friction testing precautions are citedand a prescribed method of recording friction data is recom-mended. Requirements for minimum data and a format for present-ing these data are suggested. Thank you for visiting our website and your interest in our free products and services. We are nonprofit website to share and download documents. Test surfaces that aetm prone to blocking or interlock-ing of surface features are particularly prone to showing abreakaway force spike.