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GB/T 1939-2009 English PDF

US$359.00 · In stock
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GB/T 1939-2009: Method of testing in compression perpendicular to grain of wood
Status: Obsolete

GB/T 1939: Evolution and historical versions

Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
GB/T 1939-2009English359 Add to Cart 3 days [Need to translate] Method of testing in compression perpendicular to grain of wood Obsolete GB/T 1939-2009
GB/T 1939-1991English199 Add to Cart 2 days [Need to translate] Method of testing in compression perpendicular to grain of wood Obsolete GB/T 1939-1991

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Basic data

Standard ID GB/T 1939-2009 (GB/T1939-2009)
Description (Translated English) Method of testing in compression perpendicular to grain of wood
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard B60
Classification of International Standard 79.020
Word Count Estimation 8,834
Date of Issue 2009-02-23
Date of Implementation 2009-08-01
Older Standard (superseded by this standard) GB/T 1939-1991
Quoted Standard GB/T 1928-2009; GB/T 1929-2009; GB/T 1931-2009
Regulation (derived from) 2009 No.3 (Total No.143) China National Standard Approval Announcement
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 wood stripes and compression test equipment, test procedure, , specimens and test results are recorded the results of the calculation and reporting. This standard applies to timber unblemished small sample of all stripes and stripes partial compression test compression test.

GB/T 1939-2009: Method of testing in compression perpendicular 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 compression perpendicular to grain of wood ICS 79.020 B60 National Standards of People's Republic of China Replacing GB/T 1939-1991 Wood grain compression testing method (ISO 3132. 1975, Wood-Testingincompressionperpendiculartograin, 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 3132. 1975 "wood grain compression tests." This standard and ISO 3132. 1975 compared to the main technical content differences are as follows. --- Add "5.2.5 with automatic load-deformation and having recording automatically calculate the proportional limit load device, which can be used directly Proportional limit load value, the exact value to 50N "(1975 edition Nian and 5.2.5); --- 5.3.2 modify the sample moisture content of 12% of the radial or tangential stripes all the proportional limit compressive stress shall σ 12 = σ y y W [1 + 0.045 (W-12)] to calculate (1975 edition and 5.3.2); --- Add "6 wood grain partial compression test" (1975 and Chapter 6 of this edition). This standard replaces GB/T 1939-1991 "Test Method for Compressive wood grain." This standard compared with GB/T 1939-1991, the main changes are as follows. --- 4.1 modify, record load load step distance, should be less than 50N/mm (1991 edition Nian and 4.1); --- 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 and Excerpts 4.4); --- Modify 5.1.3 and 6.1.3, the pith from outside the test material evenly from outside to inside the interception (in 1991 and this edition 5.1.3,6.1.3); --- 5.2.4 Delete "will fill the above test results Appendix A (Supplement) records in the table" (1991 edition and 5.2.4); --- Add "5.2.5 with automatic load-deformation and having recording automatically calculate the proportional limit load device, which can be used directly Principle 3 Load stripes from the compressive strength test - the deformation maps to determine the proportional limit load, calculate the proportional limit compressive stress wood grain.

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 bearings. Testing Machine Recording means should record load load step distance, should be less than 50N/mm; recording interval scale specimen deformation should not To 0.01mm/mm. 4.2 recording device tester can not be used, the application accurately to the test specimen deformation measurement device 0.01mm, shown in Figure 1.

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