ASTM G115 PDF
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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This breakaway force is commonlyused to calculate static friction Fig. Friction Wear Force Abrasive Shoe. Astj of the listed tests or other acceptedtests may be used.
G 40— 93 3. Other important factors to simulate arenormal force contact pressurevelocity, type of motion reciprocating versus unidirectional and environment. It is hoped that the use of auniform reporting format will provide the basis for the prepa-ration of handbooks and computerized gg115. 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 –
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. Please download to get full document. Each triboelementcontains one or more tribosurfaces. Blocking is a term used to describe thetendency of some plastic materials to stick to each other afterlong periods of contact. In this case an elastic frictionmeasuring system would be appropriate.
These databases can be searched for material couples andtribosystems of interest. No other units of measurement are included in this standard.
Weartest machines are often equipped with sensors to measurefriction forces also. Sufficient information on test conditions will be available to determine applicability of the friction data to the engineer’s specific needs.
The usual manifestation is a cycling decrease andsubsequent increase in the friction force as sliding proceeds Fig.
ASTM Gpdf – Documents
If an application involves materialssuch as friction composites, one of the brake type dynamom-eter tests may be appropriate. It is hoped that the use of a uniform reporting format will provide the basis for the preparation of handbooks and computerized databases. A number in g11 indicates the year of last reapproval. 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.
Their use will significantly reduce the need for each laboratory to do its own testing.
Link to Active This link will always route to the current Active version of the standard. The overall goal of this guide is to provide a reporting formatthat will enable computer databases to be readily established. Current edition approved October 10, If you have any questions about copyright issues, please report us to resolve them.
Test xstm that are prone to blocking or interlock-ing of surface features are particularly prone to showing abreakaway force spike. Asuperscript epsilon e indicates an editorial change since the last revision or reapproval. Plasticizer migration can be the cause.
General friction testing precautions are citedand a prescribed method of recording friction data is recom-mended. Thank you for visiting our website and your interest in our free products and services.
Last previous edition G – 93 e 1. G 40 — The appropriate device to use is the onethat closely simulates a tribosystem of interest. When pulling a steelcable over the same roll, it would be more appropriate to use astiff testing system. Standard Costing Jul 25, All materials on our website are shared by users.
April Current version: Summary of Guide 4. Originallypublished as G – To the running of this website, we need your help to support us. Historical Version s – view previous versions of standard. Requirements for minimum data and a format for present-ing these data are suggested. We are xstm website to share and download documents. We Need Your Support. We are always happy to assist you.
A superscript epsilon e indicates an editorial change since the last revision or reapproval. Requirements for minimum data and a format for presenting these data are suggested.
Referenced Documents purchase separately The documents listed below are referenced within the subject standard but 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. The overall goal of this guide is to provide a reporting format that will enable computer databases to be readily established. These databases can be searched for material couples and tribosystems of interest.