Differences in microstructure can often lead to large differences in mechanical properties. Here, the composition, microstructure, and mechanical properties of mussel, scallop, and ostreidae were researched. And subsequently, three bionic models were designed based on the microstructures of the three shellfish. Three models were prepared by printing the substrate with light-cured resin and filling with carbon fiber reinforced epoxy resin. The mechanical properties and reinforcement mechanisms of the three models were also investigated. The bending fracture force, compression fracture, and the impact fracture energy of mussels was best of three shellfish. The bionic model 1 with mimic mussel structure has good mechanical properties. Bending strength of model 1 is 42.80 ± 7.00 MPa which was 5.42% higher than bionic model 2 and bionic model 3, and 33.75% higher than that of the pure epoxy resin (32.00 MPa). The absorbed energy of the model 1 is 63.53 ± 2.56%, which is 3.82% and 7.89% higher than model 2 and model 3, respectively. The fracture showed obvious toughness fracture. The unique crack deflection induced by the structure also leads to enhanced mechanical properties. This study provides new design ideas and references for the structural design of high-strength composites.

中文翻译：

---

基于贝类结构的仿生树脂基复合材料的设计与研究

微观结构的差异往往会导致机械性能的巨大差异。在这里，研究了贻贝、扇贝和牡蛎科的成分、微观结构和机械性能。随后，根据三种贝类的微观结构设计了三种仿生模型。通过用光固化树脂印刷基板并填充碳纤维增强环氧树脂来制备三个模型。还研究了三个模型的力学性能和增强机制。贻贝的弯曲断裂力、压缩断裂能和冲击断裂能是三种贝类中最好的。仿贻贝结构的仿生模型1具有良好的力学性能。模型1的弯曲强度为42.80±7.00 MPa，比仿生模型2和仿生模型3提高了5.42%，比纯环氧树脂（32.00 MPa）提高了33.75%。模型1的吸收能为63.53±2.56%，分别比模型2和模型3高3.82%和7.89%。断口呈明显的韧性断裂。该结构引起的独特裂纹偏转也导致机械性能增强。该研究为高强复合材料的结构设计提供了新的设计思路和参考。