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ASTM E855-08(2013)

Historical Reaffirmation

Standard Test Methods for Bend Testing of Metallic Flat Materials for Spring Applications Involving Static Loading

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1.1 This standard describes three test methods2 for determining the modulus of elasticity in bending and the bending strength of metallic strips or sheets intended for the use in flat springs:

1.1.1 Test Method A—a cantilever beam,

1.1.2 Test Method B—a three-point loaded beam (that is, a beam resting on two supports and centrally loaded), and

1.1.3 Test Method C—a four-point loaded beam (that is, a beam resting on two supports and loaded at two points equally spaced from each support).

1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.

1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.


4.1 Measurements of bending strength and modulus of elasticity in bending should be made for materials whose principal stressing mode is bending. For many materials, the tensile and compressive moduli are somewhat different. Since the bending modulus is a combination of the tensile and compressive moduli, it is often different from each of them.

4.2 Precise measurements of the modulus of elasticity in bending and bending strength require due regard for numerous variables that may affect their determination. These include (1) characteristics such as specimen orientation with respect to the rolling direction, grain size, residual stresses, previous strain history, dimensions and specimen preparation, orientation of deformed grains relative to the direction of the normal stress; and (2) test conditions, such as tem- perature, temperature variations, condition of the test equipment and adherence to the recommended test procedure.

SDO ASTM: ASTM International
Document Number E855
Publication Date April 1, 2013
Language en - English
Page Count 9
Revision Level 08(2013)
Supercedes
Committee E28.02
Publish Date Document Id Type View
Feb. 1, 2021 E0855-21 Revision
Dec. 1, 2008 E0855-08 Revision
Jan. 1, 2000 E0855-90R00 Revision
April 1, 2013 E0855-08R13 Reaffirmation
Jan. 1, 2000 E0855-90R95 Reaffirmation