Collaborative Research: Controlling Surface Damage in Machining of Hierarchical Biological Composites

这项合作研究奖的研究目标是开发加工结构生物复合材料的能力，如骨和珍珠层，表面损伤最小。这些生物复合材料表现出从宏观到微观长度尺度的多层次结构，以及新颖的结构力学性能。该研究方法将利用新型诊断仪器研究生物复合材料的变形/断裂，并利用高分辨率光学技术分析加工中的变形。围绕有限元分析和移动热源理论构建的建模将用于预测由切割产生的复合材料表面的热机械状态。模型预测将与实验观察结果进行比较。通过整合这些结果，将为改进切割程序提出建议，以最大限度地减少此类结构生物材料的表面损伤。如果成功，这些结果的更广泛影响将是未来生物启发结构材料的新切割方法，以及最大限度地减少对骨骼和组织损伤的改进手术程序。研究结果也将有助于理解未来复杂生物启发（结构）材料和软物质的变形和切割，并继续开发生物复合材料的诊断仪器。补充研究是一个教育和培训计划，其中包括开发一个骨切割试验台的从业人员和实习生，学生实习，研讨会系列网络广播，并在研究生学习中培养创业精神适度的重点。

The research objective of this Collaborative Research award is to develop capabilities for machining structural biological composites such as bone and nacre with minimal surface damage. These biological composites exhibit many levels of hierarchical structures from macroscopic to microscopic length scales, and novel structural mechanical properties. The research approach will utilize novel diagnostic instruments for studying deformation/fracture in biological composites and high-resolution optical techniques for analysis of deformation in machining. Modeling structured around finite element analysis and moving heat source theory will be used to predict the thermomechanical state of the composite surfaces created by cutting. Model predictions will be compared with the experimental observations. By integrating these results, recommendations will be developed for improved cutting procedures that will minimize surface damage in this class of structural bio-materials.If successful, the broader impact of the results will be new cutting methodologies for the bio-inspired structural materials of the future, and improved procedures for surgery that minimize damage to bone and tissue. The results will be of value also in understanding deformation and cutting of complex bio-inspired (structural) materials of the future and soft matter, and for continued development of diagnostic instrumentation for biological composites. Complementing the research is an education and training program that includes development of a bone cutting test-bed for practitioners and interns, student internships, seminar series webcast, and a modest focus on fostering entrepreneurship in graduate study.