MATERIALS & DESIGN最新文献_第5页

Stacked-origami mechanical metamaterial with tailored multistage stiffness 具有定制多级刚度的堆叠折纸机械超材料

IF 8.4

MATERIALS & DESIGN Pub Date : 2021-08-27 DOI: 10.21203/rs.3.rs-849340/v1

G. Wen, Gaoxi Chen, K. Long, Xuan Wang, Jie Liu, Y. Xie

{"title":"Stacked-origami mechanical metamaterial with tailored multistage stiffness","authors":"G. Wen, Gaoxi Chen, K. Long, Xuan Wang, Jie Liu, Y. Xie","doi":"10.21203/rs.3.rs-849340/v1","DOIUrl":"https://doi.org/10.21203/rs.3.rs-849340/v1","url":null,"abstract":"\u0000 Origami-baed metamaterial has shown remarkable mechanical properties rarely found in natural materials, but achieving tailored multistage stiffness is still a challenge. This study proposes a novel zigzag-base stacked-origami (ZBSO) metamaterial with tailored multistage stiffness property based on crease customization and stacking strategies. A high precision finite element (FE) model to identify the stiffness characteristics of the ZBSO metamaterial has been established, and its accuracy is validated by quasi-static compression experiments. Using the verified FE model, we demonstrate that the multistage stiffness of the ZBSO metamaterial can be effectively tailored through two manners, i.e. varying the microstructures (through introducing new creases to the classical Miura origami unit cell) and altering the stacking way. Three strategies are utilized to vary the microstructure, i.e. adding new creases to the right, left, or both sides of the unit cell. We further reveal that the proposed ZBSO metamaterial has several outstanding advantages compared with traditional mechanical metamaterials, e.g. material independent, scale-invariant, lightweight, and excellent energy absorption capacity. The unravelled superior mechanical properties of the ZBSO metamaterials pave the way for the design of the next-generation cellular metamaterials with tailored stiffness properties.","PeriodicalId":101318,"journal":{"name":"MATERIALS & DESIGN","volume":"26 1","pages":""},"PeriodicalIF":8.4,"publicationDate":"2021-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74458174","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 20

Multilayered recoverable sandwich composite structures with architected core 多层可回采夹层复合结构

IF 8.4

MATERIALS & DESIGN Pub Date : 2021-04-25 DOI: 10.1016/j.matdes.2021.110268

V. Damodaran, Anna Hahm, P. Prabhakar

引用次数: 2

Roadmap for additive manufacturing of HAYNES® 282® superalloy by laser beam powder bed fusion (PBF-LB) technology 采用激光粉末床熔合(PBF-LB)技术的HAYNES®282®高温合金增材制造路线图

IF 8.4

MATERIALS & DESIGN Pub Date : 2021-03-13 DOI: 10.2139/ssrn.3721832

R. Otto, V. Brotan, P. Carvalho, M. Reiersen, J. S. Graff, M. Sunding, O. Å. Berg, S. Diplas, A. Azar

{"title":"Roadmap for additive manufacturing of HAYNES® 282® superalloy by laser beam powder bed fusion (PBF-LB) technology","authors":"R. Otto, V. Brotan, P. Carvalho, M. Reiersen, J. S. Graff, M. Sunding, O. Å. Berg, S. Diplas, A. Azar","doi":"10.2139/ssrn.3721832","DOIUrl":"https://doi.org/10.2139/ssrn.3721832","url":null,"abstract":"Abstract Although various alloy systems have been explored for additive manufacturing (AM) during the past decade, introducing a new alloy remains a challenging task. Most of the materials require iterative builds, for investigating numerous parameters and determining a viable and repeatable process window. Among the challenging yet highly demanded materials, Haynes 282 superalloy was chosen. It was initially processed through conventional density cube approach, by varying the process parameters for each processed cube. Although the relative densities of the initial builds were not dramatically low, micro-cracks were present in all of them, mostly evolved on a selective number of grain boundaries and spanning only across a single laser path. Detailed modelling and advanced characterization techniques were employed to understand the root cause and cracking mechanism. It was found that the grain boundary precipitates are responsible for crack initiation, amid stress gradient across the grain boundary due to the adjacent grain orientations. Therefore, the failure mechanism is determined as ductility-dip cracking. Based on the findings, a new process window was defined using elevated temperature and novel scanning strategy. No cracks were observed under the modified processing window, meaning that the material can reliably be processed by laser beam powder bed fusion (PBF-LB).","PeriodicalId":101318,"journal":{"name":"MATERIALS & DESIGN","volume":"19 2 1","pages":""},"PeriodicalIF":8.4,"publicationDate":"2021-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85973210","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 19

Design of multi-layered architecture in dissimilar ceramic/metal joints with reinforcements clustering away from both substrates 在不同的陶瓷/金属接头中设计多层结构，增强筋远离两个基板

IF 8.4

MATERIALS & DESIGN Pub Date : 2021-01-15 DOI: 10.1016/j.matdes.2020.109379

Feng Qinghua, Panpan Lin, Guanglu Ma, Tiesong Lin, P. He, W. Long, Zhang Qiuguang

引用次数: 7

Influence of fiber type on the tensile behavior of high-strength strain-hardening cement-based composites (SHCC) at elevated temperatures 纤维类型对高强应变硬化水泥基复合材料高温拉伸性能的影响

IF 8.4

MATERIALS & DESIGN Pub Date : 2021-01-01 DOI: 10.1016/j.matdes.2020.109397

I. Curosu, M. Liebscher, Sarah Burk, Huanyu Li, S. Hempel, Norbert Raak, H. Rohm, V. Mechtcherine

引用次数: 22

Laser powder bed fusion additive manufacturing of highly conductive parts made of optically absorptive carburized CuCr1 powder 激光粉末床熔合增材制造光吸收渗碳CuCr1粉末高导电性零件