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| Nondestructive identification of the mechanical properties of layered structures based on surface displacements |
| Received:October 28, 2020 Revised:March 15, 2021 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx20201028004 |
| KeyWord:composite materials nondestructive testing inverse problem boundary displacement fields finite element updating method |
| Author | Institution |
| 赵冬梅 |
大连理工大学 工程力学系 工业装备结构分析国家重点实验室, 大连 |
| 邓建伟 |
大连理工大学 工程力学系 工业装备结构分析国家重点实验室, 大连 |
| 孙直 |
大连理工大学 工程力学系 工业装备结构分析国家重点实验室, 大连 |
| 梅跃 |
大连理工大学 工程力学系 工业装备结构分析国家重点实验室, 大连 |
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| Abstract: |
| Identification of heterogeneous material property distributions is of great significance in various engineering fields.In general, the optimization-based inverse methods are used to solve the inverse identification problems, which requires knowledge of the full field displacement throughout the domain of interest.However, it is highly difficult to measure the displacements in the interior part of the structure with high accuracy.Therefore, we propose a novel approach which is capable of characterizing the heterogeneous mechanical property distribution of layered structures merely by using the surface displacement datasets.Compared with the reconstructed results by the full-field displacement measurement, the proposed inverse algorithm based on surface displacements can still reconstruct the heterogeneous mechanical parameters of composite structures with decent accuracy.We have also performed a number of the numerical experiments on laminated structures and successfully show the proof of the concept of the proposed method.The inverse method based on the surface deformation might have great potential for structural damage identification and nondestructive testing. |