Materials Reports  2020, Vol. 34 Issue (Z1): 480-485 |
| METALS AND METAL MATRIX COMPOSITES |
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| Interlaminar Tensile Strength Behavior and B-basis Value of Thick LaminatesBased on Anderson-Darling Test |
| HAO Xinchao
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| COMAC Shanghai Aircraft Design and Research Institute, Shanghai 201210, China |
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Abstract There were many researches on interlaminar shear properties of composites in China, but few on interlaminar tensile strength. The interlaminar tensile strength of T800 thick composite laminates was tested. The k-sample Anderson-Darling test was used to do statistical analysis of the test results, and the influence of thickness, temperature/humidity and acceptable delamination defects on the interlaminar tensile strength were studied to provide data for the application of composite materials on civil aircraft. The test results show that: in the range of 5—12.9 mm thickness, changing the thickness will not affect the interlaminar tensile stress; compared with the room temperature dry state, the elevated temperature wet state reduces the interlaminar tensile stress of the laminate; delamination defects seriously affect the interlaminar tensile strength, and the interlaminar tensile strength of specimens with delamination defects is not significantly affected by the environment. After the goodness-of-fit test of normal distribution by Anderson-Darling method, the B-basis value of the interlaminar tensile strength without delamination defects and the B-basis value of the interlaminar tensile strength with delamination defects were obtained. Based on B-basis value above, the interlaminar tensile strength B-basis reduction factor of acceptable delamination defects was 0.39.
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Published: 01 July 2020
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| About author:: Xinchao Hao, senior engineer of COMAC Shanghai Aircraft Design and Research Institute, has been engaged in the structural design of civil aircraft for a long time. |
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