ASTM B871-01

Standard Test Method for Tear Testing of Aluminum Alloy Products

SCOPE
1.1 This test method covers the static tear test of aluminum alloy products using specimens that are 0.040 in. (1 mm) to 0.250 in. (6.35 mm) thick.
1.2 This test method is applicable to aluminum alloy products having a minimum thickness of 0.040 in. (1 mm).
1.3 This test method provides a measure of both notch toughness and resistance to crack propagation with the primary use as a screening or merit rank test.
1.4 The reliability of the tear test has been established in various research programs by reasonably good correlations between data from the tear tests and fracture toughness tests.
Note 1—Direct measurement of fracture toughness may be made in accordance with Practices B 645, B 646 and Test Method E 399.
1.5 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.
1.6 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.

General Information

• Status: Historical
• Publication Date: 09-Oct-2001
• ICS: 77.040.10 - Mechanical testing of metals
• ICS: 77.150.10 - Aluminium products
• Technical Committee: B07 - Light Metals and Alloys
• Drafting Committee: B07.05 - Testing

Relations

• Replaces: ASTM B871-96 - Standard Test Method for Tear Testing of Aluminum Alloy Products
• Effective Date: 10-Oct-2001
• Replaced By: ASTM B871-01(2007) - Standard Test Method for Tear Testing of Aluminum Alloy Products
• Effective Date: 01-Apr-2007

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:B871–01
Standard Test Method for
1
Tear Testing of Aluminum Alloy Products
This standard is issued under the fixed designation B871; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
5
1. Scope E4 Practices for Force Verification of Testing Machines
E83 Practice for Verification and Classification of Exten-
1.1 This test method covers the static tear test of aluminum
5
someters
alloy products using specimens that are 0.040 in. (1 mm) to
E338 Test Method for Sharp-Notch Testing of High-
0.250 in. (6.35 mm) thick.
5
Strength Sheet Materials
1.2 This test method is applicable to aluminum alloy prod-
E399 Test Method for Plane-Strain Fracture Toughness of
ucts having a minimum thickness of 0.040 in. (1 mm).
5
Metallic Materials
1.3 This test method provides a measure of both notch
toughnessandresistancetocrackpropagationwiththeprimary
3. Terminology
use as a screening or merit rank test.
3.1 Definitions of Terms Specific to This Standard:
1.4 The reliability of the tear test has been established in
3.1.1 initiation energy, IE (FL)—the amount of energy
various research programs by reasonably good correlations
,
23 requiredtoinitiateacrackinatearspecimen.Initiationenergy
betweendatafromtheteartestsandfracturetoughnesstests.
is determined by integrating the area under the force-
NOTE 1—Direct measurement of fracture toughness may be made in
displacement curve from the beginning of the test to the point
accordance with Practices B645, B646 and Test Method E399.
of maximum force.
1.5 Thevaluesstatedininch-poundunitsaretoberegarded
3.1.2 propagation energy, PE (FL)—the amount of energy
as the standard. The values given in parentheses are for
required to propagate a crack in a tear specimen. Propagation
information only.
energy is determined by integrating the area under the force-
1.6 This standard does not purport to address all of the
displacement curve from the point of maximum force to the
safety concerns, if any, associated with its use. It is the
point of complete fracture.
responsibility of the user of this standard to establish appro-
3.1.3 tear resistance—a general term describing the resis-
priate safety and health practices and determine the applica-
tance of a material to crack propagation under static loading,
bility of regulatory limitations prior to use.
either in an elastic or plastic stress field.
−2
3.1.4 tear strength, TS (FL )—the maximum nominal di-
2. Referenced Documents
rect and bending stress that the tear specimen is capable of
2.1 ASTM Standards:
sustaining.
B557 Test Methods for Tension Testing Wrought and Cast
3.1.5 tear strength to tensile yield strength ratio (TYR)—the
4
Aluminum- and Magnesium-Alloy Products
ratioofthetearstrengthtotensileyieldstrengthofthematerial
B645 Practice for Plane Strain Fracture Toughness Testing
determined in accordance with Test Methods B557.
4
−1
of Aluminum Alloys
3.1.6 unit propagation energy, UPE (FL )—the amount of
B646 Practice for Fracture Toughness Testing of Alumi-
energy required to propagate a crack across a tear specimen
4
num Alloys
divided by the original net area of the specimen.
4. Summary of Test Method
1
This test method is under the jurisdiction of ASTM Committee B07 on Light
4.1 The tear test involves a single edge notched specimen
Metals and Alloys and is the direct responsibility of Subcommittee B07.05 on
that is statically loaded through pin loading holes. The force
Testing.
Current edition approved Oct. 10, 2001. Published January 2002. Originally and displacement required to fracture the specimen are re-
published as B 871–96. Last previous edition B 871–96.
corded for analysis.
2
Kaufman, J. G., and Holt, Marshall, “Fracture Characteristics of Aluminum
Alloys,” Alcoa Research Laboratories Technical Paper No. 18.
3
Kaufman,J.G.,andKnoll,A.H.,“Kahn-TypeTearTestsandCrackToughness
of Aluminum Sheet,” Metals Research and Standards, April 1964, pp. 151–155.
4 5
Annual Book of ASTM Standards, Vol 02.02. Annual Book of ASTM Standards, Vol 03.01.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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B871–01
4.2 Tear test specimens should be fractured using any products, as determined in accordance with Practices B645,
mechanical test machine capable of quasi-static loading at a B646 and Test Method E399. Limited data suggest that the
crosshead speed of 0.05 in./min (1.3 mm/min) or less. test may be sensitive to crosshead rates above 0.5 in./min.
6. Apparatus
5. Significance and Use
6.1 The test shall be conducte
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