Fixture and method for testing creep behaviors of composite
A technology of composite materials and test fixtures, applied in the direction of analyzing materials, using stable tension/pressure to test material strength, measuring devices, etc., can solve the problem that the test method cannot be directly applied to composite materials, etc., to achieve convenient loading and simple and convenient operation , Guarantee the effect of test accuracy
Active Publication Date: 2018-11-06
BC P INC CHINA NAT PETROLEUM CORP +1
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Moreover, the test methods for tensile creep of metal materials and plastic
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Abstract
The invention discloses a fixture and a method for testing creep behaviors of a composite. Each tensile device comprises a dowel bar with one end connected in a chuck of a creep testing machine, the other end of the dowel bar is connected with a tensile plate through a bracket, and an arc structure tightly attached to the inner wall of an annular sample is arranged on the periphery of the tensileplate; two tensile devices are clamped on the inner walls of the upper part and the lower part of the annular sample respectively. The fixture is reasonable in structural design, the to-be-tested annular sample can be clamped firmly, tensile creep behaviors can be tested smoothly, clamping slip of the sample during testing is avoided, and testing precision is further guaranteed. Meanwhile, the method for testing the tensile creep behaviors is provided for a continuous fiber reinforced composite, calculation accuracy of modulus of creep is guaranteed, and a method for calculating long-term strength of creep failure is provided.
Description
technical field [0001] The invention belongs to the technical field of composite material tensile creep testing, and in particular relates to a composite material creep behavior testing fixture and a testing method. Background technique [0002] Fiber-reinforced resin-based composite materials have the advantages of light weight, high specific strength, good fatigue resistance, good corrosion resistance, and strong designability. They are widely used in aerospace, construction engineering, petrochemical, transportation and other industries. And with the gradual improvement of material performance and lightweight requirements, the amount of composite materials used in the above fields is also gradually increasing. Composite materials are often used as the main structural material in aerospace, petrochemical and other fields, and bear a certain load, especially when the hoop load is similar to the pipeline structure, the unidirectional composite material bears a large part of ...
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Login to View More IPC IPC(8): G01N3/04G01N3/08
CPCG01N3/04G01N3/08G01N2203/0017G01N2203/04G01N2203/0071
Inventor 张冬娜戚东涛邵晓东马秋荣蔡雪华
Owner BC P INC CHINA NAT PETROLEUM CORP