ASTM D642-2000(2010) Standard Test Method for Determining Compressive Resistance of Shipping Containers Components and Unit Loads《测定船用集装箱 组合件和单体加载的抗压缩能力的标准试验方法》.pdf

《ASTM D642-2000(2010) Standard Test Method for Determining Compressive Resistance of Shipping Containers Components and Unit Loads《测定船用集装箱 组合件和单体加载的抗压缩能力的标准试验方法》.pdf》由会员分享，可在线阅读，更多相关《ASTM D642-2000(2010) Standard Test Method for Determining Compressive Resistance of Shipping Containers Components and Unit Loads《测定船用集装箱 组合件和单体加载的抗压缩能力的标准试验方法》.pdf（5页珍藏版）》请在麦多课文档分享上搜索。

1、Designation: D642 00 (Reapproved 2010)Standard Test Method forDetermining Compressive Resistance of ShippingContainers, Components, and Unit Loads1This standard is issued under the fixed designation D642; the number immediately following the designation indicates the year oforiginal adoption or, in

2、the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.1. Scope1.1 Thi

3、s test method covers compression tests on shippingcontainers (for example, boxes and drums) or components, orboth. Shipping containers may be tested with or withoutcontents. The procedure may be used for measuring the abilityof the container to resist external compressive loads applied toits faces,

4、to diagonally opposite edges, or to corners (Fig. 1 andFig. 2). This test method covers testing of multiple containersor unit loads, in addition to individual shipping containers,components, materials, or combination thereof.1.2 The test method of applying load may be used tocompare the characterist

5、ics of a given design of container witha standard, or to compare the characteristics of containersdiffering in construction.1.3 This test method is related to TAPPI T804, which issimilar for fixed platen machines but does not recognize swivelplaten machines. This test method fulfills the requirement

6、s ofInternational Organization for Standardization (ISO) TestMethod 12048. The ISO standards may not meet the require-ments for this test method.1.4 The values stated in inch-pound units are to be regardedas standard. The values given in parentheses are mathematicalconversions to SI units that are p

7、rovided for information onlyand are not considered standard.1.5 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-b

8、ility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2D644 Test Method for Moisture Content of Paper andPaperboard by Oven Drying3D996 Terminology of Packaging and Distribution Environ-mentsD2016 Methods of Test for Moisture Content of Wood3D4169 Practice for Perfor

9、mance Testing of Shipping Con-tainers and SystemsD4332 Practice for Conditioning Containers, Packages, orPackaging Components for TestingD4577 Test Method for Compression Resistance of a Con-tainer Under Constant LoadE4 Practices for Force Verification of Testing MachinesE122 Practice for Calculatin

10、g Sample Size to Estimate,With Specified Precision, the Average for a Characteristicof a Lot or Process2.2 TAPPI Standard:T 804 Compression testing of fiberboard shipping contain-ers42.3 ISO Standard:ISO 12048 PackagingComplete, filled transportpackagesCompression and stacking test using compres-sio

11、n tester53. Terminology3.1 DefinitionsGeneral terms for Packaging and Distribu-tion Environments are found in Terminology D996.3.2 Definitions of Terms Specific to This Standard:3.2.1 fixed platen testing machinea testing machineequipped with two platens which are both restrained fromtilting.3.2.2 s

12、wiveled platen testing machinea testing machineequipped with two platens, one rigidly restrained from tiltingwhile the other platen is universally mounted and allowed totilt freely.1This test method is under the jurisdiction of ASTM Committee D10 onPackaging and is the direct responsibility of Subco

13、mmittee D10.21 on ShippingContainers and Systems - Application of Performance Test Methods.Current edition approved Aug. 1, 2010. Published October 2010. Originallyapproved in 1941. Last previous edition approved in 2005 as D642 00(2005)1.DOI: 10.1520/D0642-00R10.2For referenced ASTM standards, visi

14、t the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Withdrawn.4Available from the Technical Association of the Pulp and Paper Industry, 15Technology

15、 Parkway South, Atlanta, GA 30092.5Available from American National Standards Institute, 25 W. 43rd St., 4thFloor, New York, NY 10036.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.4. Significance and Use4.1 Compressive resistance i

16、s one of the properties used toevaluate the ability of shipping containers, components, andunit loads to successfully survive the compressive forces theyare subjected to during storage and distribution (see Note 1).NOTE 1For constant load test refer to Test Method D4577.4.2 Compressive resistance ma

17、y be determined with eitherfixed- or swiveled-platen-type testing machines. However, afixed-head compression machine is required to perform edge-to-edge and corner-to-corner orientations on test specimens(see Note 2). Also, unit loads are generally tested only in thetop-to-bottom orientation.NOTE 2F

18、ixed-platen machines generally cause specimens to fail attheir strongest point, while swivel-platen machines cause specimens to failat their weakest point.6The swiveled platen is allowed to move to theweakest point of the container.5. Apparatus5.1 Compression Testing Machines:5.1.1 Fixed-Platen Test

19、ing MachineTwo platens, flat towithin 0.01 in. (0.25 mm) for each 12 in. (304.8 mm) in length,and one of which is movable in the vertical direction so as tocompress the container between the platens. One is the loadmeasuring platen, and both should be of sufficient size so thatthe test container doe

20、s not extend beyond the edges of theplatens. Both platens are fixed in the horizontal directions so asto have no lateral movement greater than0.05 in. (1.3 mm), andare held parallel throughout the test to within 0.04 in. (1 mm)for each 12 in. (304.8 mm) in the length and width dimensions.5.1.2 Swive

21、l-Platen Testing MachineTwo platens, flat towithin 0.01 in. (0.25 mm) for each 12 in. (304.8 mm) in length,and one which is movable in the vertical direction so as tocompress the container between the platens. One is theload-measuring platen, and both should be of sufficient size sothat the test con

22、tainer does not extend beyond the edges of theplatens. One platen is fixed in the horizontal direction so as tohave no lateral movement greater than 0.05 in. (1.3 mm). Thesecond platen is attached to the machine by a swivel oruniversal joint to a point directly centered on the platen,allowing the pl

23、aten to tilt freely.5.2 Suitable Closure ApparatusSee Appendix X1.5.3 Conditioning ApparatusProvide adequate facilitiesfor conditioning test containers at proper relative humidity andtemperature prior to test in accordance with the requirements ofthe specifications covering the containers to be test

24、ed. It isrecommended that the atmospheres for conditioning be se-lected from those shown in Practice D4332. Unless otherwisespecified, fiberboard and other paperboard containers shall bepreconditioned and conditioned in accordance with the stan-dard atmosphere specified in Practice D4332.6. Sampling

25、, Test Specimens, and Test Units6.1 Choose test specimens and sample quantities to providean adequate determination of representative performance. Forlarge production runs, lot sampling is advised. Application ofPractice E122 is suggested.6.2 Whenever sufficient containers and contents are avail-abl

26、e, it is recommended that five or more replicate tests beconducted to improve the statistical reliability of the dataobtained.6.3 The specimens being tested shall be complete in allrespects. Depending on the purpose of the test, interiorcomponents may or may not be included. Tests shall be madeon sp

27、ecimens with or without contents as prescribed.6.4 The test specimen shall be closed and secured in thesame manner as will be used in preparing them for shipmentunless otherwise specified. The method of flap securement forcorrugated containers may affect test results (see AppendixX1).7. Calibration

28、and Standardization7.1 The accuracy of the test equipment must be verified toensure reliable test data.7.1.1 The overall system accuracy of the recorded or indi-cated applied load (force) shall be verified in accordance withPractice E4. The verified loading range shall be specified, anderrors within

29、 the loading range shall not exceed 61.0 % ofreading (as calculated in Practice E4). If testing below thePractice E4 verified loading range is desired, then the maxi-mum permissible error shall not exceed6 0.2 % of the fullrange of the force sensor. Calculate as follows:E 5 FS3 0.002 (1)where:E = ma

30、ximum permissible error, lbf or N, andFS= force sensors full range, lbf or N.7.1.2 The accuracy of the recorded or indicated platendisplacement must be verified in accordance with the equip-ment manufacturers recommended procedures. The error,including the effects of any backlash in the loading syst

31、em,shall not exceed 60.1 in. (62.5 mm).7.1.3 The accuracy of the platen travel rate at 0.5 in./min(12.7 mm/min) must be verified throughout each loading rangein accordance with the equipment manufacturers recom-mended procedures. The error, including any backlash in theloading system, shall not exce

32、ed 60.10 in./min (62.5 mm/min).8. Conditioning8.1 Test specimens shall be conditioned prior to test orduring test, or both, in accordance with the requirements of theapplicable specification. When no conditioning requirementsare given and container materials are moisture sensitive, astandard conditi

33、oning atmosphere is recommended in accor-dance with Practice D4332.8.1.1 Moisture content determination may be carried out formoisture-sensitive materials at the time of the test to confirmtest effects of conditioning (see Appendix X2).8.2 For special applications, and depending on the purposeof the

34、 test, the test specimens may be conditioned prior to thecompression test by water immersion, exposure to water spray,or other specific conditions.6Singh, S. P., Burgess, G., Langlois, M., “Compression of Single-Wall Corru-gated Shipping Containers Using Fixed and Floating Test Platens,” ASTM JOTE,J

35、uly 1992.D642 00 (2010)29. Procedure9.1 Center the specimen on the lower platen of the testingmachine in the desired orientation, so as not to incur eccentricloading.9.1.1 Significant errors may result during testing if thespecimen is placed off-center on the platen. Also, extensivedamage to equipme

36、nt may occur if test specimens are placedoff-center on the platen.9.2 Bring the platens into contact with the specimen apply-ing an initial pressure or pre-load.9.2.1 For single-wall corrugated containers, an initial forceor pre-load of 50 lbf (222 N) on the specimen is recommended.For double-wall a

37、nd triple-wall boxes, pre-loads of 100 lbf(445 N) and 500 lbf (2220 N) respectively are recommended.For other types of test specimens a suitable pre-load may ormay not be selected.9.3 Fixed platen machines must be used for tests where thecompressive loads are applied on test specimen edges, or ondia

38、gonal corners (Fig. 1). Either fixed-platen or swivelplatenmachines may be used for face-to-face compressive tests (Fig.2).9.4 If the testing machine is not fitted with a load-deformation recorder, record the test load for every 0.1 in. (2.5mm) of deformation of the container (see 9.4.1). Set theloa

39、d-deformation recorder to display zero deformation.9.4.1 When testing full containers, and the load sensingdevice is located under the bottom platen, be sure to zero thetest machine with the product on it, or subtract the containerweight from peak load readings.9.5 Apply the load with a continuous m

40、otion of the movableplaten of the testing machine at a speed of 0.5 6 0.1 in. (12.76 2.5 mm)/min until failure or a specified load, has beenreached (see Note 3).NOTE 3Special applications, such as Practice D4169, Element D, mayrequire that a specific load be calculated and then applied to the contai

41、ner.9.6 Prior to testing for each type of loading, critical pointsshall be established, where applicable. Record the compressiveload at these critical deformations, together with the maximumload and deformation.10. Report10.1 Report the following information:10.1.1 A statement indicating that the te

42、sts were performedin accordance with this test method, except where noted.10.1.2 Container Structural and Physical Specifications:10.1.2.1 Inside dimensions should be specified for all cor-rugated and solid fiberboard containers.10.1.2.2 Description of the contents (products) of the con-tainer and g

43、ross weight of the filled container, as tested.10.1.2.3 Description and specification of materials, style ofcontainer, access holes, and double scores.10.1.2.4 Description and specifications for interior packag-ing, if used.10.1.2.5 Spacing, size, and type of fasteners and method ofclosure.FIG. 1 Co

44、mpression Applied Diagonally Opposite Edges FIG. 2 Compression Applied Top-to-BottomD642 00 (2010)310.1.2.6 Printing amount and location on container. Recordcaliper of printed and plain surfaces.10.1.3 Detailed Results for Each Test Specimen:10.1.3.1 Pre- and post-test damage to the container andcon

45、tents.10.1.3.2 Any observations that may assist in correctly inter-preting the results or aid in improving the design of thecontainer (for example, photographic evidence of containerdamage).10.1.3.3 Nature and cause of failure.10.1.3.4 Any tests performed on the test specimen prior tocompression tes

46、ting.10.1.3.5 A tabulation of individual maximum load anddeformation results.10.1.3.6 Graph or table showing the load-deformation rela-tionship for each test.10.1.3.7 Number of specimens tested.10.1.3.8 Mean and standard deviation calculations of allspecimens tested.10.1.4 Identification of Test App

47、aratus and InstrumentationUsed, Including Manufacturers Names and Model Numbers.10.1.4.1 Type of test machine used, such as fixed orswiveled platen. Include details of any known modifications.10.1.4.2 Orientation in which the specimen was tested, suchas platen speed and pre-load applied to the test

48、specimen, ifany.10.1.4.3 Date of last calibration of apparatus and recordinginstrumentation.10.1.5 Method, if any, of conditioning the container.10.1.6 The moisture content of the wood, plywood, orfiberboard, if determined.10.1.7 Description of test set-up used such as pallets,fixtures, or simulatio

49、n devices.10.1.8 The results of any supplementary tests of the mate-rials from which the container is made.11. Precision and Bias711.1 The precision and bias statement is based on datadeveloped from a round-robin compression test8conducted byeleven laboratories. The test specimens consisted of 200-lb testC-flute regular slotted containers measuring 16 by 12 by 10 in.When testing empty RSC-style corrugated containers for top tobottom compression strength using a fixed-platen compressiontester, the precision of the test method is as follows:11.1.1 RepeatabilityThe