Department of Aeronautics and Astronautics, Fudan University, Shanghai 200433, China.
ACS Biomater Sci Eng. 2021 Nov 8;7(11):5014-5021. doi: 10.1021/acsbiomaterials.1c00988. Epub 2021 Oct 1.
Natural materials developed in complex architectures that comprise hard and soft phases often display extraordinary mechanical properties, such as the combination of high strength and toughness. Besides the structural arrangements, residual stress is ubiquitous in those materials. Although evidence shows its significant role in the functionalities and properties of the composites, good or bad, residual stress is not fully understood and utilized. In this study, we show through extensive numerical simulations the role of the prestress in strengthening typical brick-and-mortar biocomposites. We investigate the influence of the prestressing modes, as well as the geometrical and material parameters. The results promise a deep understanding of the relation between the prestress and the material strength and may inspire a new dimension of material design.
天然材料在复杂的结构中发展，这些结构包含硬相和软相，通常具有非凡的机械性能，例如高强度和韧性的结合。除了结构排列，残余应力在这些材料中普遍存在。尽管有证据表明它在复合材料的功能和性能中起着重要作用，但无论好坏，残余应力都没有被充分理解和利用。在这项研究中，我们通过广泛的数值模拟展示了预应力在增强典型的砖-泥复合材料中的作用。我们研究了预应力模式的影响，以及几何和材料参数的影响。研究结果有望深入了解预应力与材料强度之间的关系，并为材料设计带来新的维度。
