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- Title
Identification of Multiple Mechanical Properties of Laminates from a Single Compressive Test.
- Authors
Gao, Bo; Yan, Huai; Wang, Boyi; Yang, Qiang; Meng, Songhe; Huo, Yanyan
- Abstract
In-plane elastic and interlaminar properties of composite laminates are commonly obtained through separate experiments. In this paper, a simultaneous identification method for both properties using a single experiment is proposed. The mechanical properties of laminates were treated as uncertainties and Bayesian inference was employed with measured strain-load curves in compression tests of laminates with embedded delamination. The strain–load curves were separated into two stages: the pre-delamination stage and the post-delamination stage. Sensitivity analysis was carried out to determine the critical properties at different stages, in order to alleviate the ill-posed problem in inference. Results showed that the in-plane Young's modulus and shear modulus in elastic properties are dominant in the pre-delamination stage, and the interlaminar strength and type I fracture toughness in interlaminar properties are dominant in the post-delamination stage. Five times of property identification were carried out; the maximum coefficient of variation of identified properties was less than 1.11%, and the maximum error between the mean values of the identified properties and the ones from standard experiments was less than 5.44%. The proposed method can reduce time and cost in obtaining multiple mechanical properties of laminates.
- Subjects
MODULUS of rigidity; ELASTICITY; YOUNG'S modulus; LAMINATED materials; FRACTURE toughness; ELASTIC modulus
- Publication
Materials (1996-1944), 2022, Vol 15, Issue 8, pN.PAG
- ISSN
1996-1944
- Publication type
Article
- DOI
10.3390/ma15082950