Modeling and analysis of the diffusion mechanism of impact force on digital forearm(PDF)
《中国医学物理学杂志》[ISSN:1005-202X/CN:44-1351/R]
- Issue:
- 2023年第2期
- Page:
- 226-231
- Research Field:
- 生物材料与力学
- Publishing date:
Info
- Title:
- Modeling and analysis of the diffusion mechanism of impact force on digital forearm
- Author(s):
- ZHANG Min1; ZHANG Lu1; YANG Mei1; ZHANG Ying1; YANG Jining1; 2; 3; QIN Yuping1; 2; 3
- 1. School of Artificial Intelligence, Neijiang Normal University, Neijiang 641100, China 2. Smart Medical Engineering Applications Laboratory, Neijiang Normal University, Neijiang 641100, China 3. NJNU-OMNISKY Smart Medical Engineering Applications Joint Laboratory, Neijiang Normal University, Neijiang 641100, China
- Keywords:
- Keywords: human forearm stress damage finite element model viscoelastic tissue rigid tissue
- PACS:
- R318；Q42 Q64
- DOI:
- 1005-202X（2023）02-0226-06
- Abstract:
- Abstract: Objective To analyze the damage effect inside human arm when suffering from explosion impact and lateral instantaneous toppling. Methods Taking the 727 images from the shoulder to the fingertip of the Chinese Digital Human as the data basis, the geometric entity of the tissues was obtained through tissue segmentation, 3D modeling, and reverse engineering. Subsequently, the injury mechanism model of stress on human forearm was established using the finite element simulation software COMSOL Multiphysics 5.5. The diffusion mechanism of impact force on human forearm was analyzed by loading the impact force of [1.4×106 N/m2] on the surface, with the response time of [2×10-5] s. Results Through modeling and analysis, it was found that because of the viscoelastic properties of skin, fat and muscle, when the body was subjected to stress impact, the generated energy could be released by deformation, so that the body would not be seriously damaged, and that the damage of stress impact to these tissues was not obvious. However, the bone is a kind of rigid tissue, and the energy exerted externally could not be converted into displacement and dissipated here, which caused a large amount of energy accumulated at the bone, so that the stress tensor at the bone was the largest. When the stress tensor exceeded the maximum bearing value of the bone, it would lead to fractures for energy transfer. Conclusion Under stress impact, the viscoelastic tissue can convert stress energy into displacement for energy dissipation, while rigid tissue cannot. Therefore, the damage of stress impact to the bone is very obvious.
Last Update: 2023-03-03