论文标题
通过支撑拓扑调节晶格材料的凹槽灵敏度
Regulation of notch sensitivity of lattice materials by strut topology
论文作者
论文摘要
我们提出了一种局部增强技术，用于在压力射击器（例如凹口）附近的晶格，以提高宏观强度和延展性。在凹口附近假设正弦形支柱上的空间不均匀的波浪性分布，并通过有限元分析研究了宏观拉伸响应对支撑杆的敏感性。确定优化的晶格结构，以最大程度地提高这些各种撑杆波动分布的宏观拉伸强度或延展性。由于这些几何形状分别代表了弯曲主导和伸展主导的晶格，因此研究了六角形和三角形晶格。
We propose a local reinforcement technique for lattices in the vicinity of a stress-raiser such as a notch, in order to elevate the macroscopic strength and ductility. A spatially non-uniform waviness distribution of sinusoidally-shaped struts is assumed in the vicinity of the notch, and the sensitivity of macroscopic tensile response to strut waviness distribution is studied by finite element analysis. Optimized lattice structures are determined in order to maximise the macroscopic tensile strength or ductility from these various strut waviness distributions. Both hexagonal and triangular lattices are studied as these geometries are representative of bending-dominated and stretching-dominated lattices, respectively.
