GMW 14093-2005 塑料部件的耐冲击性.pdf

WORLDWIDE
Test Method
ENGINEERING
GMW14093
Materials
STANDARDS
Determination of Impact Resistance of Plastic Components
1 Scope
Impact hammer to the paragraphs 3.1.1 and 3.1.2
1. 1 Purpose. The object of this test method is to
The impact hammer shall have the following
determine the impact resistance of plastic
dimensions
components under specified conditions. This test
diameter50±1mm
method shall be used for plastic components
nose radius25±1m
which, in service, are likely to be subjected to
Impact stresses
mass
510±19
1.2 Definitions
3.1.3 Apparatus C-steel ball(see Figure 3). A
steel ball having a weight of 510 t 1 g, which drops
Impact Resistance: The impact resistance to this
from a predetermined height so as to produce the
test method is defined as the resistance of plastic
specified impact energy in free fall onto the test
components to Impact stress
plece.
Note: Nothing in the specification supersedes
3. 1. 3.1 Isuzu only. A steel ball having a weight of
applicable laws and regulations unless specific
500 to 550 g is also permitted
exemption has been obtained
3. 1.3. 2 Brasil only. A steel ball having a weight of
Note: In the event of conflict between the English
(500 +5)g is also permitted
and domestic language, the English language shall
take precedence
3.2 Low temperature cabinet capable of
maintaining-30°±3C.
2 References
4 Test Material
Note: Only the latest approved standards
are
applicable unless otherwise specified
Not applicable
2.1 External Standards/Specifications
5 Test Method
5.1 Summary of Test Method.
2.2 GM Standards/Specifications.
est plece Is
subjected to a detined impact energy and then
GMW3221
evaluated
5.2 Test Sample Preparation. The finished
3 Test Equipment
component shall be tested
3.1 The following apparatus shall be used for the
5.2.1 Conditioning To Gmw3221-code A
determination of impact resistance
5.2.1.1 Isuzu only, To Gmw3221-code C
3.1.1 Apparatus A-falling Ball Testing Device
5.2.2 Test Piece Supports. Supports shall be
(see Figure 1) A falling ball testing device where
provided such that test pieces may securely
act hammer drops tr
predeter
fastened so as to as closely as possible simulate
height so as to produce the specified Impact
service conditions and to ensure that the impact
energy in free fall onto the test piece
hammer will strike at right angle to any designated
3.1.2 Apparatus B -Pendulum Impact Testing
spot on the surface. The supports shall be rigid
Machine (see Figure 2).A pendulum impact
enough to ensure that the impact force is totally
testing machine where an
hammer,
sorbed by the test piec
pendulum of specified length
5,3 Test Procedure
drops from a predetermined height so as to
5.3.1 Conditions. The test shall be performed
produce the specified impact energy on the test
under any of the following test conditions. Such
plece
conditions shall be stipulated on the relevant
drawings, material specifications etc. by th
following codings
O Copyright 2005 General Motors Corporation All Rights Reserved
April 2005
Orig inating