GB/T 22906.6-2008Test of cores -- Part 6: Determination of bending strength by three-point method (English PDF)

Foreword

GB/T 22906 "paper core measurement" is divided into nine sections.

--- Part 1. sample taken;

--- Part 2. temperature and humidity of the treated samples;

--- Part 3. Determination of moisture content (oven drying method);

--- Part 4. Determination of dimensions;

--- Part 5. Determination of characteristics of concentric rotation;

--- Part 6. Determination of flexural strength (three-point method);

--- Part 7. Determination of modulus of elasticity (three-point method);

--- Part 8. Determination of natural frequency and the elastic modulus (experimental modal analysis);

--- Part 9. Determination of flat crush strength.

This section GB/T Part of 622,906.

The partial modification of the use of ISO 11093-6:2005 "Paper and board Determination - Part 6. Determination of three-point bending strength method degree".

This part of ISO 11093-6:2005 compared to the main differences are as follows.

--- International Standard ISO document standard will be referenced in normative references converted to its corresponding national standard, GB /22906.2 Zhixin Determination T - Part 2. temperature and humidity of the treated samples (GB/T 22906.2-2008, ISO 11093-2:1994, MOD).

This part is proposed by the China National Light Industry Council.

This part of the paper by the National Standardization Technical Committee (SAC/TC141) centralized.

This section drafted by. China Pulp and Paper Research Institute, China Paper Association Professional Committee of Standardization.

1 Scope

GB/T 22906 provisions of this part of the test method for determination of three-point bending strength method cylindrical paper core, paper core inner diameter should be measured 50mm ~ 300mm, the minimum wall thickness is 5mm, the minimum measurement length of 1100mm.

This section applies to the determination of the bending strength of the paper core.

2 Normative references

The following documents contain provisions which, through reference GB/T 22906 in this section constitute provisions of this section. For dated references Documents, all subsequent amendments (not including errata content) or revisions do not apply to this section, however, encouraged to reach under this section Research into whether the parties to the agreement to use the latest versions of these documents. For undated references, the latest version applies to this section.

22906.1 paper core measurement GB/T Part 1. Sample taken (GB/T 22906.1-2008, ISO 11093-1:1994, IDT) GB /22906.2 Zhixin Determination T - Part 2. temperature and humidity of the treated samples (GB/T 22906.2-2008, ISO 11093-2.

1994, MOD)

Part 1 ISO 7500-1 testing of metallic materials of static uniaxial testing instruments. the tension/compression tester load system Test and calibration

3 Terms and Definitions

The following terms and definitions apply to this part of the GB/T 22906 of.

Under specified conditions, to a sample of a given size to be loaded when bending fracture suffered most vigorously.

Principle 4

Core sample material mechanics is regarded as a "beam." During the test, the sample is subjected to a vertical direction in the longitudinal midpoint Force (F), but only at both ends by the support force (see FIG. 1). In order to measure the bending strength, external force is applied until the sample was broken up.

F --- the applied force;

Determination of length L --- core layer (range).

1 three-point method