Non-invasive measurement of local stress inside soft materials with programmed shear waves
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arXiv
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| Main Authors: | , , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866915324795813888 |
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| author | Zhang, Zhaoyi Li, Guo-Yang Jiang, Yuxuan Zheng, Yang Gower, Artur L. Destrade, Michel Cao, Yanping |
| author_facet | Zhang, Zhaoyi Li, Guo-Yang Jiang, Yuxuan Zheng, Yang Gower, Artur L. Destrade, Michel Cao, Yanping |
| contents | Mechanical stresses in soft materials across different length scales play a fundamental role in understanding the function of biological systems and in the use of artificial materials for engineering soft machines and biomedical devices. Yet it remains a great challenge to probe local mechanical stresses in situ in a non-invasive, non-destructive manner, in particular when the mechanical properties are unknown. To address this challenge, we propose an acoustoelastic imaging-based method to infer the local mechanical stresses in soft materials by measuring the speed of shear waves induced by custom-programmed acoustic radiation force. Using a medical ultrasound transducer to excite and track the shear waves remotely, we demonstrate the application of the method by imaging uniaxial stress and bending stress in an isotropic hydrogel, and the passive uniaxial stress in a skeletal muscle. These measurements were all done without the knowledge of the constitutive parameters of the materials. These examples indicate that our method will find broad applications, ranging from health monitoring of soft structures and machines, to the diagnosis of diseases that alter stresses in soft tissues. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2506_03816 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Non-invasive measurement of local stress inside soft materials with programmed shear waves Zhang, Zhaoyi Li, Guo-Yang Jiang, Yuxuan Zheng, Yang Gower, Artur L. Destrade, Michel Cao, Yanping Soft Condensed Matter Applied Physics Mechanical stresses in soft materials across different length scales play a fundamental role in understanding the function of biological systems and in the use of artificial materials for engineering soft machines and biomedical devices. Yet it remains a great challenge to probe local mechanical stresses in situ in a non-invasive, non-destructive manner, in particular when the mechanical properties are unknown. To address this challenge, we propose an acoustoelastic imaging-based method to infer the local mechanical stresses in soft materials by measuring the speed of shear waves induced by custom-programmed acoustic radiation force. Using a medical ultrasound transducer to excite and track the shear waves remotely, we demonstrate the application of the method by imaging uniaxial stress and bending stress in an isotropic hydrogel, and the passive uniaxial stress in a skeletal muscle. These measurements were all done without the knowledge of the constitutive parameters of the materials. These examples indicate that our method will find broad applications, ranging from health monitoring of soft structures and machines, to the diagnosis of diseases that alter stresses in soft tissues. |
| title | Non-invasive measurement of local stress inside soft materials with programmed shear waves |
| topic | Soft Condensed Matter Applied Physics |
| url | https://arxiv.org/abs/2506.03816 |