CAREER: Modeling The Failure of Advanced Materials

由复合材料和层压板制成的结构通常由于在连续长度尺度上运行的相互作用损伤模式的组合而失效。抗故障设计是复杂的，因为不像单片金属合金，没有单一的失效模式占主导地位。因此，开发具有预测能力的模型至关重要，该模型包括使用聚合物、金属和基于陶瓷的先进材料对有效设计结构的这种损伤的影响。斯皮灵博士的核心研究活动是为先进材料的失效开发基于物理的模型。这些模型将以一种适合用作结构设计工具的形式呈现并积极交流，用于航空航天应用和其他地方。斯皮尔林博士通过参与工业和学术界以前的项目，在聚合物和陶瓷基复合材料和层状陶瓷材料方面拥有坚实的基础。研究将包括建模，使用封闭形式和数值，固体力学和断裂力学解决方案，并辅以适当的力学测试和观察技术。重点将放在与工业界、学术界和政府机构的合作伙伴一起就技术上重要的课题进行研究。斯皮尔林博士的教育目标是在课堂教学，学生监督和指导活动中脱颖而出。他将继续开发一门新的研究生课程，为学生在复合材料的破坏力学方面打下坚实的基础，特别是着重于使用材料力学模型来预测结构性能。这门课程通过斯皮尔林博士1995年讲授的“纤维复合材料力学”课程，直接与现有的系里课程相联系。此外，新课程是对上述研究计划的补充。这个课程和研究整合的长期目标是完善这一重要学科的教学，使其可以写成教科书或作为基于计算机的教学工具。斯皮尔林博士联合教授一门关于复合材料制造和机械测试的本科实验课程，这为该部门的研究活动和本科课程之间提供了强有力的联系。斯皮尔林博士将继续担任本科生和研究生的学术、职业和其他方面的顾问，他还将继续通过指导研究活动来教育研究生和本科生。在CAREER教师早期职业发展计划下的这项拨款将支持本提案中描述的教育和研究活动。特别是，它将允许研究者和研究生投入时间来整合这些活动。此外，它还将加强与大学、政府机构和工业界的同事之间的合作。总体目标是实现先进材料失效的更广义模型的综合，并以告知和教育当前和未来几代工程师的方式进行交流。

Spearing 9702399 Structures made from composite materials and laminates generally fail by a combination of interacting damage modes operating over a continuum of length scales. Design against failure is complicated because, unlike monolithic metal alloys, no single failure mode dominates. It is, therefore, critical to develop models with a predictive capability that include the effects of such damage for the efficient design of structures, using polymer, metal and ceramic-based advanced materials. Dr. Spearing's core research activity is the development of physically-based models for the failure of advanced materials. These models will be presented and actively communicated in a form suitable for use as structural design tools, in aerospace applications and elsewhere. Dr. Spearing has a strong grounding in this activity through his involvement in previous projects, in industry and academia, on polymer and ceramic matrix composites and layered ceramic materials. Research will include modeling, using closed-form and numerical, solid mechanics and fracture mechanics solutions supported by appropriate mechanical testing and observational techniques. The emphasis will be on conducting research on technologically important topics in conjunction with partners in industry, academia and government agencies. Dr. Spearing's educational goal is to excel at classroom teaching, student supervision and mentoring activities. He will continue to develop a new graduate course to give students a solid grounding in the failure mechanics of composite materials, particularly focusing on the use of mechanics of materials models to predict structural performance. This course links directly to the established departmental curriculum, through an existing course on the "Mechanics of Filamentary Composites," taught by Dr. Spearing in 1995. In additi on the new course complements the research plan outlined above. A longer term goal of this curriculum and research integration is to refine the teaching of this important subject to the point where it can be written as textbook or as a computer-based teaching tool. Dr. Spearing co-teaches an undergraduate laboratory course on the manufacture and mechanical testing of composite materials, which provides a strong link between the department's research activities and the undergraduate curriculum. Dr. Spearing will continue to act as an advisor for undergraduate and graduate students, on academic, career and other concerns, He will also continue to educate graduate and undergraduate students through the supervision of research activities. The award of this grant under the CAREER Faculty Early Career Development Program will support the educational and research activities described in this proposal. In particular it will allow the investigator and a graduate student to devote time to the integration of these activities. In addition it will enable increased collaboration with colleagues, in universities, government agencies and industry. The overall aim is to achieve the synthesis of more generalized models for the failure of advanced materials, and to communicate them in such a way as to inform and educate current and future generations of engineers.