标题： 各向异性粘弹性蠕变在多孔支架中的研究 显示英文标题

标题： Orthotropic Viscoelastic Creep in Cellular Scaffolds

摘要： 最近对云杉的测量揭示了与应力状态相关的归一化蠕变行为，突显了我们在基本理解方面的不足。 本研究检查各向异性响应是否源于具有不同管胞类型的复合细胞壁的微观结构和细胞特性。 通过基于代理的逆参数识别方法，确定了细胞壁的蠕变参数，该方法应用于具有不断增加的拓扑复杂性的分层微观力学和有限元模型，直至生长环尺度。 尽管存在微观结构的无序性，模拟的蠕变曲线趋于一致的成比例因子集合。 结果表明，方向性蠕变行为不能仅归因于组织尺度的拓扑结构，而且现实预测需要考虑应力集中区域的非线性材料响应。 显示英文摘要

摘要： Recent measurements of Norway spruce have revealed stress-state-dependent normalized creep behavior, highlighting a gap in our fundamental understanding. This study examines whether the anisotropic response originates from the micro-structural, cellular nature of composite cell walls with varying tracheid types. Cell wall creep parameters are identified via surrogate-based inverse parameter identification, applied to hierarchical micro-mechanical and FEM models of increasing topological complexity up to the growth ring scale. Despite microstructural disorder, simulated creep curves converge toward a universal set of proportionality factors. The results indicate that directional creep behavior cannot be attributed solely to tissue-scale topology, and that realistic predictions require the inclusion of non-linear material responses at stress concentration sites.