GB/T 8812.1-2007 PDF English
US$65.00 · In stock · Download in 9 secondsGB/T 8812.1-2007: Rigid cellular plastics -- Determination of flexural properties -- Part 1: Basic bending test Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedureStatus: Valid GB/T 8812.1: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB/T 8812.1-2007 | English | 65 |
Add to Cart
|
0-9 seconds. Auto-delivery
|
Rigid cellular plastics -- Determination of flexural properties -- Part 1: Basic bending test
| Valid |
| GB/T 8812-1988 | English | 199 |
Add to Cart
|
3 days
|
Test method for bending of rigid cellular plastics
| Obsolete |
Excerpted PDFs (Download full copy in 9 seconds upon purchase)PDF Preview: GB/T 8812.1-2007
GB/T 8812.1-2007: Rigid cellular plastics -- Determination of flexural properties -- Part 1: Basic bending test
---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT8812.1-2007
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 83.100
G 32
GB/T 8812.1-2007 / ISO 1209-1.2004
Replacing GB/T 8812-1988
Rigid Cellular Plastics - Determination of Flexural
Properties - Part 1.Basic Bending Test
(ISO 1209-1.2004, IDT)
Issued on: DECEMBER 5, 2007
Implemented on: SEPTEMBER 1, 2008
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine of the People’s Republic of China;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword... 3
1 Scope... 4
2 Normative References... 4
3 Principle... 4
4 Instruments... 5
5 Specimens... 6
6 Operating Procedures... 6
7 Expression of Results... 7
8 Precision... 7
9 Test Report... 7
Rigid Cellular Plastics - Determination of Flexural
Properties - Part 1.Basic Bending Test
1 Scope
This Part of GB/T 8812 specifies a test method for determining the load or breaking load of
rigid cellular plastic specimens at a specified deformation under the action of three-point
bending load.
This Part is applicable to materials with a thickness of not less than 20 mm.
This Part is not applicable to easily crushable cellular plastics.
This method uses small-sized specimens and does not generate pure bending deformation.
Therefore, it cannot be used to calculate flexural strength or apparent flexural modulus of
elasticity.
The determined values can only be compared when the physical properties and dimensions of
the materials are similar.
2 Normative References
The clauses in the following documents become clauses of this Part through the reference by
this Part of GB/T 8812.For the references with a specified date, all subsequent amendments
(excluding errata) or revisions are not applicable to this Part. However, parties to agreements
based on this Part are encouraged to study whether the latest versions of these documents can
be used. For undated references, the latest versions are applicable to this Part.
GB/T 2918 Plastics - Standard Atmospheres for Conditioning and Testing (GB/T 2918-1998,
idt ISO 291.1997)
GB/T 6342 Cellular Plastics and Rubbers - Determination of Linear Dimensions (GB/T 6342-
1996, idt ISO 1923.1981)
3 Principle
The load head applies load to the specimen supported on two supports at a certain speed. The
load shall be applied perpendicular to the specimen at the center of the two supporting points
(see Figure 1). Record the load value or the breaking load value when the specimen reaches the
specified deformation.
4 Instruments
4.1 Testing Machine
The material testing machine or bending testing machine shall have a load head capable of
constant speed operation. Within the testing machine’s measuring range, the load accuracy shall
be 1% and the displacement accuracy shall be 0.1 mm.
4.2 Supports
Composed of two parallel cylinders mounted on the same horizontal plate, with an arc radius
of (5 0.2) mm and a length greater than the specimen width. The span between the two
supports shall be (100 1) mm.
4.3 Load Head
The shape and dimensions shall be identical to the supports. The load head shall be at the center
of the supports and parallel to the supports.
4.4 Measuring Tools
Accuracy. 0.01 mm.
5 Specimens
5.1 Shape and Dimensions
The specimens shall be cuboid. Length. (120 1.20) mm, width. (25 0.25) mm, thickness.
(20 0.20) mm.
5.2 Preparation
During specimen preparation, the cellular structure of the specimens shall not be deformed. The
specimens may be skinned on one or more sides. If so, this condition shall be recorded.
5.3 Quantity
Each group shall consist of at least five specimens. When the test material is suspected to be
anisotropic, two groups of specimens shall be prepared, with their axes respectively parallel
and perpendicular to the direction of cell elongation.
When one side of the specimens is skinned, unless otherwise specified, two groups of
specimens shall be tested. one with the skin in tension and the other in compression. The test
results shall be separately reported.
5.4 Conditioning
The specimens shall be conditioned in an environment specified in GB/T 2918.The standard
test conditions are a temperature of (23 2) °C and a relative humidity of 50% 5%, or (27
2) °C and a relative humidity of 65% 10%. Depending on the intended use, other test
conditions may be selected, but the test temperature is preferably selected from 196 °C, 70 °C,
10 °C, 0 °C and 40 °C.
6 Operating Procedures
In accordance with the provisions of GB/T 6342, measure the specimen dimensions. Place the
specimen symmetrically on the supports and apply a load that is perpendicular to the specimen’s
longitudinal axis (see Figure 1).
Carefully adjust the position of the load head. When it just contacts the specimen, record this
position as the zero point of specimen deformation. During operation, the load head applies the
load to the specimen at a rate of (10 2) mm/min. Record the load when the specimen
deformation reaches (20 0.2) mm. If the specimen breaks before reaching a deformation of
20 mm, record the load and deformation at the point of breaking.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
Tips & Frequently Asked QuestionsQuestion 1: How long will the true-PDF of English version of GB/T 8812.1-2007 be delivered?Answer: The full copy PDF of English version of GB/T 8812.1-2007 can be downloaded in 9 seconds, and it will also be emailed to you in 9 seconds (double mechanisms to ensure the delivery reliably), with PDF-invoice. Question 2: Can I share the purchased PDF of GB/T 8812.1-2007_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 8812.1-2007_English will be deemed to be sold to your employer/organization who actually paid 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. www.ChineseStandard.us -- GB/T 8812.1-2007 -- Click this link and select your country/currency to pay, the exact amount in your currency will be printed on the invoice. Full PDF will also be downloaded/emailed in 9 seconds. Question 5: Should I purchase the latest version GB/T 8812.1-2007?Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 8812.1-2007 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. How to buy and download a true PDF of English version of GB/T 8812.1-2007?A step-by-step guide to download PDF of GB/T 8812.1-2007_EnglishStep 1: Visit website https://www.ChineseStandard.net (Pay in USD), or https://www.ChineseStandard.us (Pay in any currencies such as Euro, KRW, JPY, AUD).
Step 2: Search keyword "GB/T 8812.1-2007".
Step 3: Click "Add to Cart". If multiple PDFs are required, repeat steps 2 and 3 to add up to 12 PDFs to cart.
Step 4: Select payment option (Via payment agents Stripe or PayPal).
Step 5: Customize Tax Invoice -- Fill up your email etc.
Step 6: Click "Checkout".
Step 7: Make payment by credit card, PayPal, Google Pay etc. After the payment is completed and in 9 seconds, you will receive 2 emails attached with the purchased PDFs and PDF-invoice, respectively.
Step 8: Optional -- Go to download PDF.
Step 9: Optional -- Click Open/Download PDF to download PDFs and invoice.
See screenshots for above steps: Steps 1~3 Steps 4~6 Step 7 Step 8 Step 9
|