【摘 要】
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Auxetic structures are a special class of struc-tural components that exhibit a negative Poisson\'s ratio(NPR) because of their constituent materials,internal microstructure,or structural geometry.To realize such structures,specialized manufacturing pro
【机 构】
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Nonlinear Multifunctional Composites Analysis and Design(NMCAD) Laboratory,Department of Aerospace E
论文部分内容阅读
Auxetic structures are a special class of struc-tural components that exhibit a negative Poisson\'s ratio(NPR) because of their constituent materials,internal microstructure,or structural geometry.To realize such structures,specialized manufacturing processes are required to achieve a dimensional accuracy,reduction of material wastage,and a quicker fabrication.Hence,addi-tive manufacturing (AM) techniques play a pivotal role in this context.AM is a layer-wise manufacturing process and builds the structure as per the designed geometry with appreciable precision and accuracy.Hence,it is extremely beneficial to fabricate auxetic structures using AM,which is otherwise a tedious and expensive task.In this study,a detailed discussion of the various AM techniques used in the fabrication of auxetic structures is presented.The advancements and advantages put forward by the AM domain have offered a plethora of opportunities for the fabrication and development of unconventional structures.Therefore,the authors have attempted to provide a mean-ingful encapsulation and a detailed discussion of the most recent of such advancements pertaining to auxetic struc-tures.The article opens with a brief history of the growth of auxetic materials and later auxetic structures.Subse-quently,discussions centering on the different AM tech-niques employed for the realization of auxetic structures are conducted.The basic principle,advantages,and dis-advantages of these processes are discussed to provide an in-depth understanding of the current level of research.Furthermore,the performance of some of the prominent auxetic structures realized through these methods is dis-cussed to compare their benefits and shortcomings.In addition,the influences of geometric and process parame-ters on such structures are evaluated through a compre-hensive review to assess their feasibility for the later-mentioned applications.Finally,valuable insights into the applications,limitations,and prospects of AM for auxetic structures are provided to enable the readers to gauge the vitality of such manufacturing as a production method.
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