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| 基于虚场法的聚氨酯材料的本构参数反演 |
| Inversion of constitutive parameters of polyurethane materials based on virtual field method |
| 投稿时间：2023-11-02 修订日期：2024-01-30 |
| DOI： |
| 中文关键词: 聚氨酯材料 数字图像相关法 单轴拉伸试验 虚场法 模型更新法 二阶Mooney-Rivlin模型 Ogden模型 |
| 英文关键词:Polyurethane material Digital image correlation method Uniaxial tensile test Virtual field method Model updating method Second-order Mooney-Rivlin model Ogden model |
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| 中文摘要: |
| 为揭示聚氨酯材料的超弹特性，本文对邵氏硬度90A的聚氨酯试件进行了单轴拉伸试验，通过数字图像相关法（DIC）获得了试件的全场变形，然后基于虚场法（VFM）的数值程序反演了二阶Mooney-Rivlin模型和Ogden模型的本构参数，最后通过模型更新法进行了验证。结果表明：基于虚场法获得的上述两种超弹本构模型的载荷-位移曲线与试验高度吻合，而通过模型更新法获得的Ogden模型的载荷-位移曲线与试验吻合度不理想，揭示了虚场法相对于模型更新法的优势所在。 |
| 英文摘要: |
| In order to reveal the hyperelastic properties of polyurethane materials, a polyurethane specimen with shore hardness of 90A was tested under uniaxial tension, and the full field deformation of the specimen was obtained by digital image correlation (DIC) , then the constitutive parameters of the second-order Mooney-Rivlin model and Ogden model are inversed by a numerical program based on virtual field method (VFM) . The results show that the load-displacement curves of the above two hyperelastic constitutive models obtained by the virtual field method are in good agreement with the test height, while the load-displacement curve of Ogden model obtained by model updating method is not in good agreement with the test, which reveals the advantage of virtual field method over model updating method. |
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