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1、1 J I S H*7405 93 4933608 05Lb247 818 m IS UDC 669.01 8.9:620.168.3 JAPANESE INDUSTRIAL STANDARD Test method for tensile properties of fiber reinforced metals Translated and Published by Japanese Standards Association Printed in Japan 8s Copyright Japanese Standards Association Provided by IHS under
2、 license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/14/2007 07:20:27 MDTNo reproduction or networking permitted without license from IHS -,-,- e , 1 In the event of any doubt arising, the original Standard in Japanese is to be final authority. Copyright Japanese
3、Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/14/2007 07:20:27 MDTNo reproduction or networking permitted without license from IHS -,-,- J I S H37405 93 4933608 052b249 690 = UDC 669.018.9 : 620.168.3 JAPANESE INDU
4、STRIAL STANDARD J I S Test method for tensile properties H 7405-1993 of fiber reinforced metals 1. Scope tensile properties at room temperature and at a high temperature of metal matrix composites reinforced by continuous fiber. This Japanese Industrial Standard specifies the test method for Remarks
5、 1. The test method for tensile properties at a high temperature of fiber reinforced metals shall be in accordance with Annex. 2. The following standards are cited in this Standard: JIS B 7502 JIS B 7507 JIS B 7721 JIS B 7741 JIS C 1602 JIS H 7006 JIS Z 2241 JIS Z 8401 Micrometer callipers for exter
6、nal measurement Vernier, dial and digital callipers Tensile testing machines Extensometers used in metallic material tensile testing Thermocouples Glossary of terms used in metal matrix composites Method of tensile test for metallic materials Rules for rounding off of numerical values 2. Definitions
7、 For the main terms used in this Standard the definitions in JIS H 7006 and JIS Z 2241 apply, and the rest of the terms shall be as follows: (1) tensile stress Is a value obtained by dividing tensile load applied to a test piece at any point of time by the original sectional area of the gage part of
8、 the test piece. (2) tensile strength Is the maximum tensile stress applied to a test piece in a tension test. the gage length of a test piece by the original gage length. (3) strain Is a dimensionless quantity obtained by dividing the variation in 0 (4) fracture strain Is the maximum strain applied
9、 to a test piece in a tension test. (5) longitudinal elastic modulus under tension (a) A value obtained from the initial gradient part in a tensile load - strain diagram or a tensile stress - strain diagram. Its quantity symbol shall be Ei (see Fig. 1). A value obtained from the gradient part of the
10、 tangent drawn to a tensile load - strain diagram or a tensile stress - strain diagram at 0.5 % in strain. Its quantity symbol shall be E a (see Fig. 1). (b) Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Re
11、sale, 03/14/2007 07:20:27 MDTNo reproduction or networking permitted without license from IHS -,-,- J I S H+?405 93 M 4933608 0536250 302 M 2 H 7405-1993 Fig. 1. Example of tensile stress - strain diagram &=- do x10-3 da & dEi x 10-3 o de, 015 Strain E (%) Poissons ratio stress acting direction to s
12、train 2 in a direction crossing that at high angles within an elastic limit. gage length parallel part of a test piece before a test in order to measure elongation. parallel part length Is the length of the parallel part of test piece ex- cluding the tab-bonded part or the length of the parallel par
13、t excluding the gripping part for the test piece with no tab. test speed (elongation), which indicates speed of a crosshead. Is the absolute value of a ratio of strain EI in a tensile Is the distance between two gage marks provided to the Is speed which makes a test piece generate deformation Test a
14、pparatus Test machine A test machine, which can keep the crosshead speed a constant in a test, shall be as specified in JIS B 7721. used. Further, a closed loop system electrohydraulic material testing machine may be 3.2 Gripping device generate slippage between the test piece and the grip section,
15、and shall secure an in-plane and out-of-plane alignment (f2“) sufficient to a loading direction. A gripping device shall be so constructed as not to 3.3 Measuring tools 3.3.1 Micrometer A micrometer is for measuring the width and thickness of a test piece, and that of O mm to 25 mm in measuring rang
16、e and 0.01 mm in the minimum reading specified in JIS B 7502 or at least equal in precision thereto shall be used therefor. Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/14/2007 07:20:27 MDTNo re
17、production or networking permitted without license from IHS -,-,- J I S H*7405 93 W 4933608 0536253 249 = Part of test piece 3 H 7405-1993 Dimensions of test piece 3.3.2 Vernier calipers test piece and the length of a parallel part, and that of 300 mm in the maximum measuring length and 0.05 mm in t
18、he minimum reading specified in JIS B 7507 or at least equal in precision thereto shall be used therefor. A vernier caliper is for measuring total length of a C Thickness D Length of parallel part 4. Test piece 1.0 to 2.0 100 * 0.1 4.1 standard test piece shall be as given in Fig. 2 and Table 1. Fig
19、. 2. Shape of standard test piece Shape and dimensions of test piece The shape and dimensions of a E Length of grip section F Thickness of tab Table 1, Dimensions of standard test piece 40 2.0 H Gage length A Total length I 200 30 i 1.0 B Width I 10 rt 0.1 G Length of tab I 50 The thickness of the t
20、est piece shall be, as a rule, the original thickness of an as-fabricated composite sheet. However, in the case where the standard test piece is difficult to be used, a similar test piece of its used. or subsize may be Further, the parallel part of the test piece may be uniformly thinned within the
21、thickness range as given in Table 1 by reducing the thickness smoothly in a plate thickness direction as agreed upon between the purchaser and supplier. Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale,
22、 03/14/2007 07:20:27 MDTNo reproduction or networking permitted without license from IHS -,-,- J I S H*7405 93 m 4933608 05Lb252 II85 m 4 H 7405-1993 4.2 Preparation of test piece cated composite sheet into the specified shape and dimensions, polish the parallel After cutting out a test piece from a
23、n as-fabri- part of the test piece with abrasive cloth and paper of about No. 800 or the like to be finished. On cutting out, do not injure reinforced fibers as far as possible. blasting or the like. After washing, bond a tab with an epoxy resin adhesive. For materials of the tab, glass fiber reinfo
24、rced plastic or metal of which thermal expansion coeficient is comparatively near that of a test material should be preferable. Further, make the portion where tab to be bonded rough surface by sand 4.3 Number of test pieces The number of test pieces shall be at least five. However, a data of the te
25、st piece which was ruptured outside the parallel part shall be invalidated. 5. Operation 5.1 width and thickness of the parallel part of a test piece to the nearest 0.01 mm at Measurement of the shape and dimensions of test piece Measure the three positions of both ends- and central part between gag
26、e marks. Calculate the average cross-sectional area by using respective values. 5.2 Bonding of strain gage the central front and rear sides of the parallel part of a test piece, and bond biaxial strain gages longitudinally to the test piece and crosswise thereto. In order to remove bending strain ca
27、used by warpage or the like of an as-fabricated composite sheet, connect corresponding gages on front and rear surfaces in longi- tudinal and perpendicular directions respectively, in series. When Poissons ratio is not required, the perpendicular strain gage of the test piece is unnecessary. Further
28、, in measuring the strain, extensometers of an optical, a strain gage systems, etc. may be used. In that case, precision in measurement shall be according to grade 1 specified in JIS B 7741. When strain is measured, bond strain gages to 5.3 Test temperature The test temperature shall be, as a rule,
29、296 k 5 K. 5.4 Test speed crosshead speed. The test speed shall be 0.05 mmmin to 5.0 mdmin as a 5.5 Measurement The measurement shall be as follows: (1) Record a tensile load - strain diagram or a tensile load - elongation diagram to fracture at continuous almost uniform strain or elongation interva
30、ls. Record maximum tensile load and fracture strain (elongation after fracture). When Poissons ratio is obtained, record strain normal to the strain in the loading direction in the same way as in (1). (2) (3) ,_. 6. Calculation Copyright Japanese Standards Association Provided by IHS under license w
31、ith JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/14/2007 07:20:27 MDTNo reproduction or networking permitted without license from IHS -,-,- 5 H 7405-1993 6.1 Tensile strength formula (1). Tensile strength shall be calculated according to the (1) P, Ao Oe = - where, OB :
32、 tensile strength (MPa) P, : maximum tensile load (NI Ao : original cross-sectional area of test piece (mm2) 6.2 Longitudinal elastic modulus under tension For calculation of longitudi- nal elastic modulus under tension El ( l ) , use the initial straight line part in a tensile load - strain diagram
33、 or a tensile stress - strain diagram, and obtain the longitudinal elastic modulus under tension Ei (l) according to the formula (2). 10-3 (2) Ao AO AEi - A E Ei= - - where, E1 : longitudinal elastic modulus under tension (GPa) AP : increment of tensile load (kN) AEI : increment of tensile strain co
34、rresponding to AP AO : increment of tensile stress (MPa) AO : original cross-sectional area of test piece (mm2) or A o 6.3 Longitudinal elastic modulus under tension Draw a tangent at 0.5 % in strain in a tensile load - strain diagram or a tensile stress - strain diagram, and obtain the longitudinal
35、 elastic modulus under tension EP by using the formula (3) from its gradient. O 10-3 (3) Ao A o E2= - - - AE - A& where, E2 : longitudinal elastic modulus under tension (GPa) AP : increment of tensile load (kN) AE : increment of tensile strain corresponding to dp AO : increment of tensile stress (MP
36、a) AO : original cross-sectional area of test piece (mm2) or A o at 0.5 % in strain Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/14/2007 07:20:27 MDTNo reproduction or networking permitted witho
37、ut license from IHS -,-,- 6 H 7405-1993 Note (l For materials system where longitudinal elastic modulus under tension increases as strain rises like carbon fiber reinforced aluminum alloys, the longitudinal elastic modulus under tension should preferably be expressed as a function of strain. 6.4 Poi
38、ssons ratio strain (dei) in a tensile direction generated by the increment of tensile load (U) or the increment of tensile stress (Ao) used in calculation of the longitudinal elastic modulus under tension (El) and an increment of strain (dez) in a direction normal thereto, and obtain th Poissons rat
39、io according to the formula (4). For calculation of Poissons ratio, read an increment of (4) where, v : Poissons ratio dei : increment of strain in tensile direction A E : increment of strain in a direction normal to the tensile direction 6.5 Arithmetically average the test results of at least five
40、test pieces, and round off to three significant figures in accordance with JIS Z 8401. Round off the Poissons ratio to significant two figures. Rounding off of test results 6.6 Standard deviation and coefficient of variation When standard deviation and coefficient of variation are required, calculat
41、e them according to the formulae (5) and (61, and round off to significant two figures in accordance-with JIS Z 8401. (5) n - 1 (6) cv = x 100 s where, s : standard deviation CV : coefficient of variation (%) x : each measured value ? i ? : mean of measured values n : number of measured values 7. Re
42、port The following items shall be recorded in the report on test results. (1) Test materials (a) Class of materials (b) Manufacturing method and manufacturing condition Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie
43、 Not for Resale, 03/14/2007 07:20:27 MDTNo reproduction or networking permitted without license from IHS -,-,- J I S H+405 93 W 4933bOB 0536255 994 (7) 7.2 7 H 7405-1993 (c) (d) Structure of lamination (e) (0 Condition for heat treatment Test piece (a) Working method (b) Sampling position and direct
44、ion (c) Shape and dimensions Number of test pieces Test temperature Test speed Test results (a) Tensile strength (b) (c) Fracture strain Test date Manufacturers name and manufacturing lot number Volume fraction of reinforced fiber Longitudinal elastic modulus under tension (Ei, Ed , Additional items
45、 The following items should be preferably additionally stated in the report on test results. (i) (2) Test results Macroscopic and microscopic rupture mode of test piece (a) Representative tensile load - strain diagram or tensile stress - strain diagram (b) Poissons ratio (c) Average, standard deviat
46、ion, and coefficient of variation concerning tensile strength, longitudinal elastic modulus under tension (Ei, Ed and fracture strain Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/14/2007 07:20:2
47、7 MDTNo reproduction or networking permitted without license from IHS -,-,- 8 H 7405-1993 Temperature range Over 573 up to and incl. 873 Annex Test method for tensile properties at high temperature of fiber reinforced metals Tolerance I 3 1. Scope temperature of metal matrix composites reinforced by
48、 continuous fiber. This Annex specifies the test method for tensile properties at high Over 873 up to and incl. 1073 Over 1073 up to and incl. 1473 2. Test apparatus f 4 rt5 2.1 Test machine body. The test machine shall be as described in 3.1 of the main 2.2 Gripping device main body. The gripping device shall be as described in 3.2 of the 2.3 Heating apparatus with a temperature regulator is used, which shall be always able to heat uniform- ly and constantly over the whole