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ASTM-D6110:2005 Edition

ASTM-D6110:2005 Edition

$44.96

D6110-05 Standard Test Methods for Determining the Charpy Impact Resistance of Notched Specimens of Plastics

Published By Publication Date Number of Pages
ASTM 2005 17
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1.1 This test method is used to determine the resistance of plastics to breakage by flexural shock as indicated by the energy extracted from standardized (see Note 1) pendulum-type hammers, mounted in standardized machines, in breaking standard specimens with one pendulum swing. This test method requires specimens to be made with a milled notch (see Note 2). The notch produces a stress concentration which promotes a brittle, rather than a ductile, fracture. The results of this test method are reported in terms of energy absorbed per unit of specimen width (see Note 3).

Note 1The machines with pendulum-type hammers have been standardized in that they must comply with certain requirements including a fixed height of hammer fall, which results in a substantially fixed velocity of the hammer at the moment of impact. Hammers of different initial energies (produced by varying their effective weights), however, are recommended for use with specimens of different impact resistance. Moreover, manufacturers of the equipment are permitted to use different lengths and constructions of pendulums with possible differences in pendulum rigidities resulting (see Section ). Be aware that other differences in machine design do exist.

Note 2The specimens are standardized in that they have a fixed length and fixed depth, however, the width of the specimens is permitted to vary between limits. One design of milled notch is allowed. The notch in the specimen serves to concentrate the stress, minimize plastic deformation, and direct the fracture to the part of the specimen behind the notch. Scatter in energy-to-break is thus reduced. Because of differences in the elastic and viscoelastic properties of plastics, however, response to a given notch varies among materials.

Note 3Caution must be exercised in interpreting the results of this test method. The following testing parameters have been shown to affect test results significantly: method of specimen fabrication, including but not limited to processing technology, molding conditions, mold design, and thermal treatment; method of notching; speed of notching tool; design of notching apparatus; quality of the notch; time between notching and test; test specimen thickness; test specimen width under notch; and environmental conditioning.

1.2 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.

Note 4This standard resembles ISO 179 in title only. The content is significantly different.

PDF Catalog

PDF Pages PDF Title
1 Scope
Referenced Documents
Terminology
Summary of Test Method
Significance and Use
2 Apparatus
3 FIG. 1
FIG. 2
4 FIG. 3
5 Test Specimen
FIG. 4
FIG. 5
6 Notching Test Specimens
7 Conditioning
Procedure
8 Calculation
Report
Precision and Bias
TABLE 1
9 Keywords
A1. INSTRUCTIONS FOR THE CONSTRUCTION OF A WINDAGE AND FRICTION CORRECTION CHART
A1.1
A1.2
A1.3
A1.4
A1.5
FIG. A1.1
FIG. A1.2
10 A1.6 Instructions for Using Chart
A2. PROCEDURE FOR THE CALCULATION OF WINDAGE AND FRICTION CORRECTION
A2.1
A2.2
A2.3
A2.4
A2.5
A2.6
A2.7
A2.8
A2.9
A2.10
11 X1. PROCEDURE FOR THE INSPECTION AND VERIFICATION OF NOTCH
X1.1
X1.2 Apparatus
X1.3
X1.4
FIG. X1.1
12 X1.5
X1.6
FIG. X1.2
13 X1.7
FIG. X1.3
14 X2. CALIBRATION OF PENDULUM-TYPE HAMMER IMPACT MACHINES FOR USE WITH PLASTIC SPECIMENS
X2.1
X2.2
X2.3
FIG. X1.4
15 X2.4
X2.5
X2.6
X2.7
X2.8
X2.9
X2.10
X2.11
X2.12
X2.13
X2.14
X2.15
16 X3. DERIVATION OF PENDULUM IMPACT CORRECTION EQUATIONS
X3.1
X3.2
X3.3
X3.4
X3.5
X3.6
X3.7
X3.8
X3.9
X3.10
X3.11
X3.12 Nomenclature
FIG. X3.1
FIG. X3.2
17 X4. UNIT CONVERSIONS
X4.1
X4.2

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