1、 ENGINEERING STANDARDS Test Procedure LIMITED USE EDS-T-7660 Test Method for Determining the Bending Strength of Chipboards and Similar Materials Do Not Use on New Program; No Replacement. ? .(& 8T18:8 I$ 4G - Note: 8 E:48t G8 =97 FF7 957%L+ , FG P-P Program 72P# 957%L: 6#$ . Copyright 2011 General
2、Motors Company All Rights Reserved September 2011 Originating Department: GM Korea Engineering Standards Page 1 of 4 Version : 3 1 Scope Note: Nothing in this standard supersedes applicable laws and regulations. Note: In the event of conflict between the Korean and English language, the Korean langu
3、age shall take precedence. 1.1 Purpose and Applicability. This test method shall be used to determine the bending strength of wood chipboards and similar materials. It is not suitable for the determination of the modules of elasticity. 2 References Note: Only the latest approved standards are applic
4、able unless otherwise specified. 2.1 External Standards/Specifications. None 2.2 GM Standards/Specifications. None 2.3 Additional References. None 3 Resources 3.1 Equipment. 3.1.1 Humidity chamber capable of maintaining a temperature of +23 E 2K and relative humidity of (506) %. 3.1.2 Vernier Calipe
5、rs for measuring the thickness. 3.1.3 Testing machine capable of loading the test piece at a uniform rate, and of indicating the load to within 1 % of the ultimate failing load. 3.1.4 Bending test jig (See Figure 1). 3.1.5 Suitable cutting equipment for the preparation of the test piece (e.g. saws,
6、shears etc). 1 P7 :0 : ., E:48 6&F !7$ :4-8! 9I8x $4=F 3L 6$ . :0 : F67t 7568 18 88x 7 , F6* 72T8p) F$ . 1.1 +95 -C 957 -88 . ., 4G -8t 7& ?.(& (Wood Chipboards) -C 8T1 8:8 I$ (Bending Strength)* 9IFd 88F 17%L6:! A2e8x 9I8x 88F2T 95907 38%P E:48x 957F$ . 2.1 17 E:4 / . None 2.2 GM E:4 / . None 2.3 d
7、A E:4 / . None 3 4G 88 3.1 4G 8/x . 3.1.1 +23 E 2K 8 7$7t (506) % 1$4 3$* 8T:F 3L 8# 38X 7X/D . 3.1.2 % ?U9I8x 88F -6#6 $4 H8x d)F$ . 5 4G $8Bd 5.1 D4 . I$# $847 8F 1F$ . 1 dB= MW= 3F k _ v L W 2bd 6 7 d2P , 1 = I$ (N/mm2) d = 4G D8 D % (mm) Fmax = $4H (N) b = 4G D8 E! (mm) LS = :$4 8 (mm) 5.2 0 E4
8、. 1d 4G -7 66: I$# 5 4G 08 13T DF8x ?F7 N/mm2) !A!%L 0.1 N/mm2: E4F$ . 6 6|987 $4F 7 9 ., E:48t 88G ,p: , 86 , 8/x &%8x E FF 3L 8$ . ., E:48t 87 $4F 170 4)%P +& 6|98 ,l9P8 F8x 9P4F:# 6#$ . &d(2P 17 987 95FF 6|980 I 1B* 9DF , -18 9PF 728 957 7 .* 9IF# 8t ., E:4 1788 =y8 1F8$ . 7 768 9I8 7.1 98,l 76 .
9、 I$ ( ): 8 4G -7 8F 9I%L# I$# $4 F:E72P8 +C7t $+ +%) 38 :3L) !A!$ . 1 dB = MW +C (M): +C# $4 F:E8 1/20 :$4 18 88 1/28 %8p) !A!$ . GM KOREA ENGINEERING STANDARDS EDS-T-7660 Copyright 2011 General Motors Company All Rights Reserved September 2011 Page 4 of 4 Version : 3 M = F k _ v 2 L W2 Section Modu
10、lus (W): The section modulus shall be defined as the product of the width and the square of the thickness divided by a factor of 6. W = b d66 7.2 Acronyms, Abbreviations, and Symbols. Not applicable. 8 Coding System This standard shall be referenced in other documents, drawings, etc., as follows: M
11、= F k _ v 2 L W2 $+ +%) 3 (W): $+ +%) 3# 4G D8 E!0 % 8 938x %F7 68p) !#) 9P9I / -PF%L6$ . Issue / P9I8)Y Publication Date / 38 88 Description (Organization) / 9PP9I76 (:04.2P ) 3 SEP 2011 Apply new Engineering Standard Template. Limited use with no replacement (Polymer / Organic Material Lab Team) / 4 d3TE:4 64 957 . F9I957 ($4=E:4 68 ) =* (G)8*4G D4 )
