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GB/T 1937-2009: Method of testing in shearing strength parallel to grain of wood
Status: Obsolete GB/T 1937: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 1937-2009 | English | 239 |
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Method of testing in shearing strength parallel to grain of wood
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GB/T 1937-2009
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| GB/T 1937-1991 | English | 199 |
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Method of testing in shearing stength parallel to grain of wood
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GB/T 1937-1991
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PDF similar to GB/T 1937-2009
Basic data | Standard ID | GB/T 1937-2009 (GB/T1937-2009) | | Description (Translated English) | Method of testing in shearing strength parallel to grain of wood | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | B60 | | Classification of International Standard | 79.020 | | Word Count Estimation | 6,668 | | Date of Issue | 2009-02-23 | | Date of Implementation | 2009-08-01 | | Older Standard (superseded by this standard) | GB/T 1937-1991 | | Quoted Standard | GB/T 1928-2009; GB/T 1929-2009; GB/T 1931-2009 | | Adopted Standard | ISO 3347-1976, MOD | | Regulation (derived from) | National Standard Approval Announcement 2009 No.3 (Total No.143) | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China | | Summary | This standard specifies the determination of shear strength parallel to the grain of the wood test equipment, specimens, test procedures and results of calculations. This standard applies to a small sample of the wood along the grain unblemished shear strength tests. | GB/T 1937-2009: Method of testing in shearing strength parallel to grain of wood---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Method of testing in shearing strength parallel to grain of wood
ICS 79.020
B60
National Standards of People's Republic of China
Replacing GB/T 1937-1991
Grain of wood shear strength test method
(ISO 3347. 1976, Wood-Determinationofultimate
shearingstressparaleltograin, MOD)
Posted 2009-02-23
2009-08-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
This revised standard adopts the International Standard ISO 3347. 1976 "grain of wood shear stress limit of determination."
This standard and ISO 3347. 1976 The main difference compared to the technical content as follows.
--- Add "missing corner angle section 5.4 specimens should be 106 ° 40 ', should be used to check the angle gauge, a tolerance of ± 20'" (1976 Nian and
Edition 5.4);
--- 7.2 modify, shear strength parallel to the grain diameter or chord plane of the sample surface moisture content of 12%, shall be τ12 = τW [1 + 0.03 (W-
12)] Calculation (1976 and this edition 7.2).
This standard replaces GB/T 1937-1991 "grain of wood shear strength test method."
This standard compared with GB/T 1937-1991, the following changes.
--- 4.3 Modify measurement tools vernier caliper or other measuring tools (1991 edition and 4.3);
--- 4.4 modify, wood moisture content determination equipment shall comply with GB/T 1931-2009 the provisions of Chapter 3 (1991 edition and 4.4);
--- Remove 6.4 "will load readings fill the Appendix A (Supplement) records in the table" (1991 edition and 6.4);
--- 6.5 modify, after the destruction of the small part of the sample, reference immediately GB/T 1931 Determination of moisture content (1991 edition and 6.5);
--- Edit "8 recording and reporting test results", according to the test results recorded in Appendix A fill; the test report according to GB/T 1928-
7.4 prescribed contents written in 2009 (in 1991 and Chapter 8 of this edition);
--- Increase in Appendix A test site, modify the sample mass moisture content, delete the shear area, moisture content, chord plane shear strength and anti-diameter surface
Shear strength (1991 edition and Appendix A).
Appendix A of this standard is a normative appendix.
This standard was proposed by the State Forestry Administration.
This standard by the National Standardization Technical Committee timber.
This standard is drafted by. Anhui Agricultural University.
Participated in the drafting of this standard. International Bamboo and Rattan Network Center, Chinese Academy of Forestry, Northeast Forestry University.
The main drafters of this standard. Wang Zhuangui, Jiang Zehui, this fee Hua, Wang Youhong, Liu Zhenbo.
This standard was first published in 1980, in May 1991 the first amendment.
This standard by the National Standardization Technical Committee responsible for the interpretation of wood.
Grain of wood shear strength test method
1 Scope
This standard specifies the determination of grain of wood shear strength test equipment, samples, test procedures and results of calculations.
This standard applies to small wood unblemished specimens, the shear strength test.
2 Normative references
The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent
Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research
Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard.
GB/T 1928-2009 General physical and mechanical test methods (ISO 3129. 1975, Wood-Samplingmethodsand
generalrequirementsforphysicalandmechanicaltests, NEQ)
GB/T 1929-2009 physical and mechanical test materials and test specimens sawing method (ISO 3129. 1975, Wood-Sampling
methodsandgeneralrequirementsforphysicalandmechanicaltests, MOD)
GB/T 1931-2009 Method for determination of moisture content of wood (ISO 3130. 1975, Wood-Determinationofmoisture
contentforphysicalandmechanicaltests, MOD)
Principle 3
Formed by the pressurized shear forces, so that a sample surface to another surface slip along the grain, to determine the shear strength parallel to the grain of wood.
4 Test Equipment
4.1 test machine, load measurement accuracy should be consistent with GB/T 1928-2009 requirements in Chapter 6, and has a spherical plain indenter.
4.2 grain of wood shear test device shown in Figure 1.
Annex 1 --- main lever; 6 --- compact;
2 --- wedge; 7 --- sample;
3 --- L-shaped spacer; 8 --- round head screws.
4,5 --- screw;
Figure 1, the shear test device
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