PDF GB/T 1464-2024 English (GB/T 1464-2005: Older version)
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Test method for density of sandwich construction or cores
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| GB/T 1464-2005 | English | 279 |
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Test method for density of sandwich construction or cores
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| GB/T 1464-1987 | English | 199 |
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Test method for density of nonmetal sandwich constructions or cores
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GB/T 1464-2024: PDF in English (GBT 1464-2024) GB/T 1464-2024
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 83.120
CCS Q 23
Replacing GB/T 1464-2005
Test Method for Density of Sandwich Construction or Cores
ISSUED ON. MARCH 15, 2024
IMPLEMENTED ON. OCTOBER 1, 2024
Issued by. State Administration for Market Regulation;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword... 3
1 Scope... 5
2 Normative References... 5
3 Terms and Definitions... 5
4 Test Principle... 5
5 Test Equipment... 5
6 Specimen... 6
7 Test Conditions and Conditioning... 6
8 Test Procedures... 7
9 Test Results and Treatment... 7
10 Test Report... 8
Foreword
This document was drafted in accordance with the rules provided in GB/T 1.1-2020 Directives
for Standardization - Part 1.Rules for the Structure and Drafting of Standardizing Documents.
This document serves as a replacement for GB/T 1464-2005 Test Method for Density of
Sandwich Construction or Cores. In comparison with GB/T 1464-2005, apart from structural
adjustments and editorial modifications, the main technical changes are as follows.
a) The Scope is modified (see Chapter 1; Chapter 1 of Version 2005);
b) The definition of the geometrical method is modified (see 3.1; see 3.2 of Version
2005);
c) The terms and definitions of density, sandwich construction density and core density
are deleted (see 3.1, 3.3 and 3.4 of Version 2005);
d) The accuracy of the oven is modified (see 5.1; 5.1 of Version 2005);
e) The requirements for specimen preparation are added (see 6.2);
f) The test conditions and conditioning are modified (see 7.1 and 7.2; 7.1 and 7.2 of
Version 2005);
g) The calculation formulas for sandwich construction density and core density are
merged (see 9.1; 9.1 and 9.2 of Version 2005);
h) The content of test report is modified (see Chapter 10; Chapter 11 of Version 2005).
Please note that certain content of this document may involve patents. The institution issuing
this document does not undertake the responsibility of identifying these patents.
This document was proposed by China Building Materials Federation.
This document shall be under the jurisdiction of National Technical Committee on Fiber
Reinforced Plastics of Standardization Administration of China (SAC/TC 39).
The drafting organizations of this document. Shanghai FRP Research Institute Co., Ltd.;
Shanghai SHFRP Testing Co., Ltd.; Jiangsu Goldwind Technology Co., Ltd.; Zhejiang NMG
Composites Co., Ltd.; Weihai VISIGHT New Materials Technology Co., Ltd.; Shanghai
Electric Wind Power Group Co., Ltd.; Ming Yang Smart Energy Group Ltd.; Jilin Chongtong
Chengfei New Material Co., Ltd.; Hunan Xingxin Aerospace New Materials Co., Ltd.; Nantong
Gubang Fiberglass Products Co., Ltd.; AVIC Touchstone Testing Innovation (Dachang) Co.,
Ltd.; Shanghai Warwick Certification Co., Ltd.; Beijing FRP Institute Testing Center Co., Ltd.;
Beijing FRP Research Institute Co., Ltd.
Test Method for Density of Sandwich Construction or Cores
1 Scope
This document specifies the test principle, test equipment, specimen, test conditions and
conditioning, test procedures, test results and treatment, and test report for the density of
sandwich construction or cores.
This document is applicable to the determination of the density of highly absorbent or porous
sandwich construction and various cores. Discontinuous sandwich construction or cores shall
refer to this document in implementation.
2 Normative References
The contents of the following documents constitute indispensable clauses of this document
through the normative references in the text. In terms of references with a specified date, only
versions with a specified date are applicable to this document. In terms of references without a
specified date, the latest version (including all the modifications) is applicable to this document.
GB/T 1446 Fiber-reinforced Plastics Composites - The Generals for Determination of
Properties
GB/T 3961 Terms for Fiber Reinforced Plastics
3 Terms and Definitions
The terms and definitions defined in GB/T 3961 and the following are applicable to this
document.
3.1 geometrical method
A method that takes a regular geometric body as a specimen and calculates the specimen volume
by measuring the specimen size.
4 Test Principle
Adopt the geometrical method to calculate the specimen volume. Divide the specimen mass by
the specimen volume to obtain the specimen density.
5 Test Equipment
5.1 Oven. with an accuracy of 2 C.
5.2 Dryer.
5.3 Balance. with an accuracy of 0.01 g.
5.4 Vernier caliper or other measuring tools. with an accuracy of 0.01 mm.
6 Specimen
6.1 Specimen Size
6.1.1 The upper and lower surfaces of the specimen are square or circular, and the specimen
thickness is the same as the thickness of the sandwich construction or cores.
6.1.2 For continuous cores, such as. foam plastics and balsa wood, etc., the side length or
diameter of the specimen should be 60 mm.
6.1.3 For honeycomb, corrugated and other lattice cores, the side length or diameter of the
specimen should be 60 mm, or include at least 4 complete lattices.
6.1.4 When the thickness of the sandwich construction or core product has not been determined,
the recommended core thickness is 15 mm, and the recommended panel thickness is 0.3 mm ~
1.0 mm.
6.2 Specimen Preparation
6.2.1 Specimen processing shall comply with the provisions of GB/T 1446.
6.2.2 Adjacent surfaces of the specimen shall be perpendicular to each other. The parallelism
tolerance of the upper and lower surfaces of the specimen shall not exceed 0.10 mm, and the
perpendicularity tolerance of the side surface and the upper and lower surfaces shall not be
greater than 0.20 mm.
6.3 Specimen Quantity
At least 5 valid specimens.
7 Test Conditions and Conditioning
7.1 Test Conditions
Standard laboratory environmental conditions. temperature is (23 2) C, relative humidity is
(50 10)%.
7.2 Conditioning
7.2.1 The specimen shall be conditioned under one of the following conditions.
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
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