CAJ | 학술논문

点阵夹芯板结构是一种新型的轻质、高强度多功能材料，在船舶领域有着广泛的应用前景。而传统金属材料的夹芯结构面板与芯子之间是通过粘结或焊接连接，易造成弱界面缺陷。基于此，提出一种增强金属材料桁架类夹芯复合壳板结构节点强度的新型加工工艺方法。首先，对点阵夹芯结构在准静态压缩载荷作用下的弹性本构关系进行理论分析；然后，对用该方法制备的节点增强金字塔点阵夹芯复合壳板单元结构进行准静态压缩试验研究。结果发现，随着载荷的增加，金属杆发生塑性屈服并在中间部位出现了断裂。最后，将试验结果与理论预测值进行比较，发现二者吻合较好，证明了理论分析的正确性。
점진협심판결구시일충신형적경질、고강도다공능재료，재선박영역유착엄범적응용전경。이전통금속재료적협심결구면판여심자지간시통과점결혹한접련접，역조성약계면결함。기우차，제출일충증강금속재료항가류협심복합각판결구절점강도적신형가공공예방법。수선，대점진협심결구재준정태압축재하작용하적탄성본구관계진행이론분석；연후，대용해방법제비적절점증강금자탑점진협심복합각판단원결구진행준정태압축시험연구。결과발현，수착재하적증가，금속간발생소성굴복병재중간부위출현료단렬。최후，장시험결과여이론예측치진행비교，발현이자문합교호，증명료이론분석적정학성。
A lattice material is a new-type multifunctional material with lightness and high strength, which has broad application prospects in the ship researching field. Traditional metal lattice materials are usually fabricated through welding or gluing,and the process may leave defects between panels and lattic-es. Aiming at the problem,this paper proposes a new fabrication technology of hybrid reinforced pyramidal lattice truss cores. Firstly,the elastic constitutive relations of the lattice material under quasi-static com-pressive loadings are analyzed. Then,the experimental results of the corresponding quasi-static compres-sive tests are provided. It is seen that when the loadings increase,the metal rod starts to suffer from plastic yielding,and rod fractures eventually appear at the center region. Finally,a comparison between the exper-imental results and the analytic approximation reveals only trivial differences,which successfully validates the proposed technique.