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Identification of Multiple Mechanical Properties of Laminates from a Single Compressive Test
| Content Provider | MDPI |
|---|---|
| Author | Gao, Bo Yan, Huai Wang, Boyi Yang, Qiang Meng, Songhe Huo, Yanyan |
| Copyright Year | 2022 |
| Description | 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. |
| Starting Page | 2950 |
| e-ISSN | 19961944 |
| DOI | 10.3390/ma15082950 |
| Journal | Materials |
| Issue Number | 8 |
| Volume Number | 15 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2022-04-18 |
| Access Restriction | Open |
| Subject Keyword | Materials Property Identification Laminate Delamination Sensitivity Analysis Dynamic Bayesian Network |
| Content Type | Text |
| Resource Type | Article |
