QJ 3228-2005 Test method for Poisson's ratio of composite solid propellant
1 Scope
This standard specifies the test devices, apparatus and instruments, specimens, test conditions, test procedures, and test data processing for determining the Poisson's ratio of composite solid propellant using a biaxial extensometer.
This standard is applicable to the determination of the Poisson's ratio of composite solid propellant when the strain range is small.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this part. For dated references, subsequent amendments (excluding corrections) to, or revisions of, any of these publications do not apply to this part. However, parties to agreements based on this part are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies.
GJB 770A-1997 Test method of propellant
QJ 1113 Specimens for performance test of composite solid propellant
QJ 1360-1988 Test method of Shore hardness
3 Principle
In this method, the ratio of transverse strain to corresponding longitudinal strain, namely Poisson's ratio, is measured using a biaxial extensometer to measure the transverse and longitudinal strains of the specimen within the proportional limit under uniaxial tensile test conditions.
4 Test devices, apparatus and instruments
4.1 Testing machine
In addition to the requirements of Clause 4, Method 413.1, GJB 770A-1997, the testing machine (tensile testing machine, fixtures, and measuring tools) shall also meet the following requirements:
a) The testing machine shall maintain constant speed during loading;
Foreword i
1 Scope
2 Normative references
3 Principle
4 Test devices, apparatus and instruments
5 Specimens
6 Test conditions
7 Test procedures
8 Test data processing
9 Test report
