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GB/T 1943-2009 English PDF

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GB/T 1943-2009: Method for determination of the modulus of elasticity in compression perpendicular to grain of wood
Status: Obsolete

GB/T 1943: Evolution and historical versions

Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
GB/T 1943-2009English239 Add to Cart 3 days [Need to translate] Method for determination of the modulus of elasticity in compression perpendicular to grain of wood Obsolete GB/T 1943-2009
GB/T 1943-1991English199 Add to Cart 2 days [Need to translate] Method for determination of the modulus of elasticity in compression perpendicular to grain of wood Obsolete GB/T 1943-1991

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Basic data

Standard ID GB/T 1943-2009 (GB/T1943-2009)
Description (Translated English) Method for determination of the modulus of elasticity 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 6,680
Date of Issue 2009-02-23
Date of Implementation 2009-08-01
Older Standard (superseded by this standard) GB/T 1943-1991
Quoted Standard GB/T 1928-2009; GB/T 1929-2009; GB/T 1931-2009
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 compressive modulus of elasticity of wood stripes and test equipment, test procedure, , specimens calculated results and test reports. This standard applies to the small sample timber unblemished stripes compressive modulus of elasticity measured.

GB/T 1943-2009: Method for determination of the modulus of elasticity in compression perpendicular to grain of wood


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Method for determination of the modulus of elasticity in compression perpendicular to grain of wood ICS 79.020 B60 National Standards of People's Republic of China Replacing GB/T 1943-1991 Wood grain compression modulus of elasticity measurement method 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 standard replaces GB/T 1943-1991 "wood grain compression modulus of elasticity determination." This standard compared with GB/T 1943-1991 The main changes are as follows. --- 4.2 amended as follows. leveraged strain gauge, magnification of about 1000, the base distance of 20mm. Strain gauge requirements based distance of 20mm, Gage factor (2 ± 0.5)%. Or other equivalent accuracy measuring deformation apparatus. --- The content of 6.2 to 6.5 to modify and adjust the numbers. The amendments to be adopted as an optional 1 loading test Test methods to improve test efficiency; loading head moving speed is 0.20mm/min is appropriate, to allow loading speed ranged ± 25%. 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. China Forestry Science Institute of Wood Industry. Participated in the drafting of this standard. Chinese Academy of Forestry Forestry Institute for New Technologies. The main drafters of this standard. Wang Zhaohui, Ren Haiqing, Luo Xiuqin, Yin Armenia. This standard was first published in 1980, in May 1991 the first amendment. Wood grain compression modulus of elasticity measurement method

1 Scope

This standard specifies the wood grain compression modulus of elasticity test equipment, samples, test step measurement, calculation results and test report. This standard applies to small sample timber unblemished stripes compressive modulus of elasticity measured.

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 physical and mechanical test methods - General GB/T 1929-2009 physical and mechanical test materials and test specimens sawing method GB/T 1931-2009 Method for determination of moisture content of wood Principle 3 When pressed wood grain in the proportional limit stress, stress and strain than obtaining wood grain compression modulus of elasticity.

4 Test Equipment

4.1 Test machine, must be regularly calibrated in accordance with standard procedures national measurement sector tester indication error shall not exceed ± 1%, and at least A spherical plain pressure plate (or holder). 4.2 leveraged strain gauge, magnification of about 1000, the base distance of 20mm. Strain gauge requirements based distance of 20mm, sensitivity coefficient (2 ± 0.5)%. Or other equivalent accuracy measuring deformation apparatus. 4.3 Test gauges, measuring dimensions should be accurate to 0.1mm. 4.4 GB/T 1931-2009 test equipment specified in Chapter 3.

5 Sample

5.1 test material sawing and test specimens, conducted according to GB/T 1929-2009 specified in 3.1. The radial height of the specimen timber radially, the upper and lower ends of the sample surface smoothing requirements remain parallel to each other and perpendicular to the direction of height, shown in Figure 1. a) tangential b) radial 1 wood grain compression modulus of elasticity of the sample schematic diagram of FIG.

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