Multiscale analysis of a 3D fibrous collagen tissue

IF 5.7 1区 工程技术 Q1 ENGINEERING, MULTIDISCIPLINARY
D. Orlova, I. Berinskii
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引用次数: 0

Abstract

Collagen fibers, a primary structural protein in the extracellular matrix, provides essential scaffolding for tissues. Functionally, these fibers are essential for providing mechanical support, ensuring tissues like tendons effectively transfer force from muscles to bones. Moreover, collagen is a dynamic component that plays a crucial role in mediating cell signaling, influencing various cellular behaviors and functions.

The intricate network of collagen fibers in tissues forms a highly interconnected system, highlighting the tissue's structural resilience. This complexity, especially when considering interactions between collagen fibers or with cells, presents challenges for detailed analyses.

Our study introduces a homogenization framework for 3D collagen networks with diverse number of connectivity (C ∼ 7 and 4), bridging micro-to-macro scale behaviors. We employed a numerical strategy to homogenize the RVE, incorporating boundary periodicity and uniaxial loading to determine elastic properties. Systematic evaluations yielded a stress-stretch curve, reflecting micro-scale material behavior. This behavior aligned with hyperelastic models for both highly and moderately connected collagen networks, mirroring experimental findings. Collectively, these insights enhance our understanding of collagen mechanics, setting the stage for more nuanced analyses, particularly in cellular interactions within collagen matrices.

三维纤维胶原组织的多尺度分析
胶原纤维是细胞外基质中的主要结构蛋白,为组织提供必要的支架。从功能上讲,这些纤维对于提供机械支撑至关重要,确保肌腱等组织有效地将力量从肌肉传递到骨骼。此外,胶原蛋白是一种动态成分,在介导细胞信号传导,影响各种细胞行为和功能方面起着至关重要的作用。组织中胶原纤维的复杂网络形成了一个高度互联的系统,突出了组织的结构弹性。这种复杂性,特别是当考虑到胶原纤维之间或与细胞的相互作用时,对详细分析提出了挑战。我们的研究引入了具有不同连接数量(C ~ 7和4)的3D胶原网络的均质化框架,连接微观到宏观尺度的行为。我们采用数值策略来均匀化RVE,结合边界周期性和单轴载荷来确定弹性特性。系统评估得出了反映微观尺度材料行为的应力-拉伸曲线。这种行为与高度和适度连接的胶原蛋白网络的超弹性模型一致,反映了实验结果。总的来说,这些见解增强了我们对胶原蛋白力学的理解,为更细致的分析奠定了基础,特别是在胶原蛋白基质内的细胞相互作用。
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来源期刊
International Journal of Engineering Science
International Journal of Engineering Science 工程技术-工程:综合
CiteScore
11.80
自引率
16.70%
发文量
86
审稿时长
45 days
期刊介绍: The International Journal of Engineering Science is not limited to a specific aspect of science and engineering but is instead devoted to a wide range of subfields in the engineering sciences. While it encourages a broad spectrum of contribution in the engineering sciences, its core interest lies in issues concerning material modeling and response. Articles of interdisciplinary nature are particularly welcome. The primary goal of the new editors is to maintain high quality of publications. There will be a commitment to expediting the time taken for the publication of the papers. The articles that are sent for reviews will have names of the authors deleted with a view towards enhancing the objectivity and fairness of the review process. Articles that are devoted to the purely mathematical aspects without a discussion of the physical implications of the results or the consideration of specific examples are discouraged. Articles concerning material science should not be limited merely to a description and recording of observations but should contain theoretical or quantitative discussion of the results.
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