Multiscale characterization and micromechanical modeling of crop stem materials

Abstract

Abstract An essential prerequisite for the efficient biomechanical tailoring of crops is to accurately relate mechanical behavior to compositional and morphological properties across different length scales. In this article, we develop a multiscale approach to predict macroscale stiffness and strength properties of crop stem materials from their hierarchical microstructure. We first discuss the experimental multiscale characterization based on microimaging (micro-CT, light microscopy, transmission electron microscopy) and chemical analysis, with a particular focus on oat stems. We then derive in detail a general micromechanics-based model of macroscale stiffness and strength. We specify our model for oats and validate it against a series of bending experiments that we conducted with oat stem samples. In the context of biomechanical tailoring, we demonstrate that our model can predict the effects of genetic modifications of microscale composition and morphology on macroscale mechanical properties of thale cress that is available in the literature.

Plant phenotyping relevance

作物茎の微細構造を画像化・解析し、マクロな力学特性を予測するマルチスケール手法を開発し、オーツ麦の曲げ実験で検証しているため、植物形質取得・推定法が研究の中心である。

Code and data availability

The supplied blocks describe authors' own oat stem bending tests, microimaging, and ABAQUS modeling, but contain no public dataset, image, code, or model deposit with availability language or URL. Measured parameters appear only in paper tables (Appendices B/C), which are part of the article itself, not a separate cit-

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