|
US$139.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 15777-2017: Method for determination of the modulus of elasticity in compression parallel to grain of wood
Status: Valid GB/T 15777: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 15777-2017 | English | 139 |
Add to Cart
|
3 days [Need to translate]
|
Method for determination of the modulus of elasticity in compression parallel to grain of wood
| Valid |
GB/T 15777-2017
|
| GB/T 15777-1995 | English | 199 |
Add to Cart
|
2 days [Need to translate]
|
Method for determination of the modulus of elasticity in compressive parallel to grain of wood
| Obsolete |
GB/T 15777-1995
|
PDF similar to GB/T 15777-2017
Basic data | Standard ID | GB/T 15777-2017 (GB/T15777-2017) | | Description (Translated English) | Method for determination of the modulus of elasticity in compression parallel to grain of wood | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | B60 | | Classification of International Standard | 79.020 | | Word Count Estimation | 7,729 | | Date of Issue | 2017-11-01 | | Date of Implementation | 2018-05-01 | | Older Standard (superseded by this standard) | GB/T 15777-1995 | | Regulation (derived from) | National Standard Announcement 2017 No. 29 | | Issuing agency(ies) | General Administration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 | GB/T 15777-2017: Method for determination of the modulus of elasticity in compression 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 for determination of the modulus of elasticity in compression parallel to grain of wood
ICS 79.020
B60
National Standards of People's Republic of China
Replacing GB/T 15777-1995
Determination of compressive elastic modulus of wood along the grain
Posted.2017-11-01
2018-05-01 implementation
General Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
China National Standardization Administration released
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard replaces GB/T 15777-1995 "Determination of compressive modulus of elasticity of wood grain", in addition to editorial changes outside the main technology
The content changes as follows.
--- Increased the load on the testing machine and measuring the accuracy of the deformation device, increase the method of measuring the deformation of the paste strain gauge, and increase the deformation gauge
Range, but also to increase the measurement of sample size measurement and measurement accuracy (see 4.1, 4.2, 4.3, 6.1,.1995 edition 4.1,4.3,4.2,
6.2);
--- Increase the secondary section of the sample for the determination of density and ring width, "when the test material is sufficient, take the main section of the sample 60mm (h) × 20mm (a) ×
20mm (a) 20mm (h) × 20mm (a) ×
20mm (a) Used to determine the density and ring width. In the test material is not enough, only take the main section of the sample, intercept the sample after the test
Water rate specimens and simultaneous determination of density and ring width (see 5.2,.1995 version 5.2) ";
--- Increase the loading rate of the provisions of "a constant load rate of 0.50mm/min load to the lower limit load, load speed range
± 25% (see 6.3,.1995 version 6.4);
--- Increase the paste strain gauge deformation measurement method, "for the measurement of the deformation of wood paste deformation deformation of the case, each time you uninstall, should be slightly
Below the lower limit load, and then directly loaded to slightly exceed the upper limit load, load the maximum load does not exceed the proportion of the sample limit load and
Can not make the sample appear compression damage (see 6.3,.1995 edition of 6.4) ";
--- After the end of the test to increase the test density and the width of the ring, "when the test material is sufficient, according to the provisions of 5.2 to determine the secondary test sample density and the growth ring
Width, the lack of test materials available interception of the moisture content of the sample determination of density and ring width (see 6.5,.1995 edition of 6.6) ", which
Like sample can better characterize the parallel grain compression performance and its influencing factors;
--- Corrigendum to the original standard 7.3 Water content adjustment formula a typo (see 7.3,.1995 version 7.3);
--- Increase the test report specific content (see Chapter 8,.1995 edition of Chapter 8).
This standard proposed by the State Forestry Administration.
This standard by the National Wood Standardization Technical Committee (SAC/TC41) centralized.
This standard is drafted by the Institute of Timber Industry, Chinese Academy of Forestry.
Participated in the drafting of this standard.China Forestry Research Institute of Forestry New Technology, Zhejiang Province, wood carving mahogany furniture product quality inspection
Center, Dongguan Huakong Tony Instrument Co., Ltd.
The main drafters of this standard.Wang Zhaohui, Wang Jinping, Huang Zhonghua, Jiang Jindong, Li Zhun, Zhang Zhongli, Tian Zhaopeng, Ge Beiqing.
This standard was first released in.1995, this is the first revision.
Determination of compressive elastic modulus of wood along the grain
1 Scope
This standard specifies the testing equipment, samples, test procedures and results of the calculation of compressive elastic modulus of wood along the grain.
This standard applies to non-defective small sample of wood grain compression modulus of elasticity.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version applies to this article
Pieces. For undated references, the latest edition (including all amendments) applies to this document.
General principles of wood physical and mechanical test methods
Wood mechanics test sawing and sample intercepting method GB/T 1929-2009
Determination of moisture content of wood GB/T 1931-2009
Determination of density of wood GB/T 1933-2009
3 principle
In parallel compression of wood, the compressive elastic modulus of wood along the grain is obtained from the ratio of stress to strain within the proportional ultimate stress.
4 test equipment
4.1 test machine, should be in accordance with the national standards of measurement procedures regularly calibrated test machine load indication error must not exceed ± 1%, and at least
Has a spherical sliding platen (or stand).
4.2 measuring deformation device for the strain gauge or holding extensometer, an example shown in Figure 1, the initial gauge 10mm ~ 40mm, the sample from the upper and lower
Compression head more than 10mm, compression deformation measurement error is not greater than ± 1%, or other measurement accuracy and deformation of the device.
a) Strain gauges to measure compressive deformation of wood b) Clamping extensometers to measure compressive deformation of wood
Figure 1 Measurement of wood compression deformation device example
Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 15777-2017_English be delivered?Answer: Upon your order, we will start to translate GB/T 15777-2017_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time. Question 2: Can I share the purchased PDF of GB/T 15777-2017_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 15777-2017_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet. Question 3: Does the price include tax/VAT?Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countriesQuestion 4: Do you accept my currency other than USD?Answer: Yes. If you need your currency to be printed on the invoice, please write an email to [email protected]. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay. Question 5: Should I purchase the latest version GB/T 15777-2017?Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 15777-2017 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically.
|