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GB/T 28889-2012: Test method for In-plane shear properties of composite materials
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 28889-2012 | English | 299 |
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Test method for In-plane shear properties of composite materials
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GB/T 28889-2012
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Basic data | Standard ID | GB/T 28889-2012 (GB/T28889-2012) | | Description (Translated English) | Test method for In-plane shear properties of composite materials | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | Q23 | | Classification of International Standard | 83.120 | | Word Count Estimation | 13,131 | | Quoted Standard | GB/T 1446; GB/T 3961 | | Adopted Standard | ASTM D7078/D7078M-2005, MOD | | Regulation (derived from) | National Standards Bulletin 2012 No. 28 | | 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 fiber reinforced plastic in-plane shear properties of the test equipment, specimen preparation, test conditions, test procedures and results of calculation. This standard applies to the determination of symmetrical ply fiber-re | GB/T 28889-2012: Test method for In-plane shear properties of composite materials---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.
Test method for In-plane shear properties of composite materials
ICS 83.120
Q23
National Standards of People's Republic of China
Composite inner surface shear performance test method
Issued on. 2012-11-05
2013-06-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
This standard was drafted in accordance with GB/T 1.1-2009 given rules.
This standard uses redrafted Law Amendment uses ASTMD7078/D7078M-05 "V-notched rail shear composite shear
Test methods. "
This standard ASTM D7078/D7078M-05 compared to more adjustments in the structure, listed in Appendix A of this standard and
ASTMD7078/reg number control list D7078M-05's.
The existence of standards and ASTMD7078/D7078M-05 compared to the technical differences between the terms of these differences have been involved in through the outside
Margin vertical single line blank position (|) have been marked, in Appendix B gives the corresponding list of technical differences and their causes.
The standard proposed by China Building Materials Federation.
The standard fiber-reinforced plastic by the National Standardization Technical Committee (SAC/TC39) centralized.
This standard was drafted. Shanghai FRP Research Institute Limited.
The main drafters. Zhang Xu, Yao Hui, Zhang Ruguang.
Composite inner surface shear performance test method
1 Scope
This standard specifies the fiber reinforced plastic plane shear properties of test equipment, and sample preparation, test conditions, test procedures and results
Calculation.
This standard applies to the determination symmetrical fiber reinforced plastic laminate shear strength, shear modulus and shear stress - strain curve.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein
Member. For undated references, the latest edition (including any amendments) applies to this document.
GB/T 1446 Test methods for fiber reinforced plastic properties General
GB/T 3961 fiber reinforced plastics
3 Terms and Definitions
GB/T 3961 defined by the following terms and definitions apply to this document.
3.1
Residual strain shear strength offsetshearstrength
In residual strain tolerance value is set as a starting point to the secant modulus of elasticity is the slope of a straight line, and shear stress - strain curve at the intersection
Stress.
Note. residual strain shear strength of the material used to determine the stress - strain curve is approximately linear limit, referred to as τS (non-linear curve of this definition included both
No material has been found not exclude damage). In the absence of an appropriate basis to determine if the parameter value is set, usually 0.2% engineering strain as
Set residual strain tolerance value, the corresponding residual strain shear strength denoted τS (0.2). In comparing the residual strain shear strength of the material must be used
The same residual strain tolerance limits, see Figure 1.
3.2
Secant modulus of elasticity chordmodulusofelasticity
Shear stress - strain curve, with a little strain as a starting point (Recommendation 0.15% ~ 0.25%), to take the appropriate strain increment [through
Often taking (0.4 ± 0.02)%], stress increment it corresponds with the strain increment ratio is the secant modulus of elasticity, which is regarded as the initial elastic modulus
Modulus.
3.3
Ultimate shear strength ultimatestrength
The maximum shear stress value in the range of 5% shear strain.
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