Test piece for implementing biaxial tension-compression coupling stress state through uniaxial tension
A technology of coupled stress and unidirectional stretching, applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of increasing the complexity of experimental operations, large errors in test results, and complicated test equipment, so as to avoid two-way synchronous and coordinated loading, Easy to use effects
Inactive Publication Date: 2009-05-13
TSINGHUA UNIV
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Abstract
The invention belongs to the technical field of mechanical property measurement and particularly relates to a test piece which realizes bidirectional tension and compression coupling stress state by unidirectional stretching. The central part of a flat panel is bored with holes symmetrically to ensure that a decussation shape is formed at the central part. When pull is applied along unidirectional direction, the test piece bears the pull lengthways by self special shape and also applies the pressure to a central working area transversely, automatically and synchronously. The test piece is simple and convenient for using, does not require a complex matched clamp and can realize plane tension and compression coupling stress state just by the unidirectional stretching of the test piece by an existing unidirectional material testing machine directly; and a pressure field is applied synchronously and automatically by the self structure of the test piece without contacting with the outside of the test piece, thereby avoiding the disadvantage that the bidirectional stress state only can be realized by a double-shaft testing machine and also avoiding the problem of bidirectional synchronous concordant loading when using the double-shaft material testing machine.
Application Domain
Strength properties
Technology Topic
Uniaxial tensionPull force +6
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Examples
- Experimental program(1)
Example Embodiment
PUM
Property | Measurement | Unit |
Thickness | 2.0 ~ 4.0 | mm |
Major axis length | 140.0 ~ 160.0 | mm |
Minor axis length | 70.0 ~ 90.0 | mm |
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