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In order to improve the mechanical properties of three-dimensional negative Poisson ratio materials, and expand the application of negative Poisson ratio materials. A new unit cell of negative Poisson ratio structural material was proposed by introducing internal concave angles into the edges of tetrahedral porous structures, and 7 kinds of orthogonal isotropic and orthogonal anisotropic enhancement designs were carried out on it. The influence of cell geometry parameters on the dimension one equivalent elastic modulus and Poisson ratio of new and enhanced cells was studied by using the homogenized finite element method and periodic boundary conditions,and the 3D printed resin sample was used for experimental verification. Compared with the existing negative Poisson ratio unit cells, the novel unit cell can save 50% of materials while maintaining the negative Poisson ratio characteristics. The three reinforcement schemes in x-direction, y-direction and xy-direction can significantly improve the bearing-load capacity while improving the negative Poisson ratio characteristics.
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为了提高三维负泊松比材料的力学性能,拓展负泊松比材料的应用范围。首先,通过在正四面体多孔结构的边线引入内凹角,提出了一种全新的空间负泊松比材料的单位胞元,并对其进行了7种正交各向同性和正交各向异性的增强设计。利用均匀化有限元方法和周期性边界条件研究了胞元几何参数对新型胞元和增强胞元的量纲一等效弹性模量和泊松比的影响规律,并利用3D打印的树脂试样进行了试验验证。相比已有的负泊松比材料的正方体胞元,新型胞元可在保持负泊松比特性的同时节省材料50%;x向、y向和xy两向3种增强方案可在提高负泊松比特性的同时明显提高承载能力。
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郄彦辉(通信作者),男,1976年生,河北保定人,博士,副教授,硕士研究生导师;主要研究方向为承压设备的安全评估、力学超材料结构的设计与性能表征、结构的数值模拟和优化设计;E-mail:
qieyanhui@126.com。
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刘宇乐,男,1998年生,河南信阳人,硕士研究生;主要研究方向为力学超材料结构的设计和数值模拟;E-mail:839473779@qq.com。
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Re-entrant regular tetrahedral cell, figureFileSmall=sVJRJ8E9545hlSoSDjZn0A==, figureFileBig=8d1EtFpJvzLipYdkW1w5Gw==, tableContent=null), ArticleFig(id=1241049286016823815, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049267482194073, language=CN, label=图1, caption=
内凹正四面体胞元, figureFileSmall=sVJRJ8E9545hlSoSDjZn0A==, figureFileBig=8d1EtFpJvzLipYdkW1w5Gw==, tableContent=null), ArticleFig(id=1241049286377533970, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049267482194073, language=EN, label=Fig.2, caption=
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空间内凹正方体胞元, figureFileSmall=uYEVxy58qz+3/RU05D1MxA==, figureFileBig=Gqpj3n2q6IiQNahfhcZjbA==, tableContent=null), ArticleFig(id=1241049286666940959, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049267482194073, language=EN, label=Fig.3, caption=
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单位胞元结构及其几何参数, figureFileSmall=oHMRMSgUEMnZ3rP2GNzvEA==, figureFileBig=qTN5p2rgag3kpqMt52/F1w==, tableContent=null), ArticleFig(id=1241049286985708076, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049267482194073, language=EN, label=Fig. 4, caption=
Seven kinds of enhanced unit cell structures, figureFileSmall=edcoEAet3jgmBaEFLFVtgg==, figureFileBig=TzJ5d6qZjK+xKWKAk9HGGQ==, tableContent=null), ArticleFig(id=1241049287061205555, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049267482194073, language=CN, label=图4, caption=
7种增强胞元结构, figureFileSmall=edcoEAet3jgmBaEFLFVtgg==, figureFileBig=TzJ5d6qZjK+xKWKAk9HGGQ==, tableContent=null), ArticleFig(id=1241049287157674555, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049267482194073, language=EN, label=Fig.5, caption=
Effect of the scale parameter L on vzx, figureFileSmall=usqrBT+UkAgeTs2ohB5YVg==, figureFileBig=srtQOgBA1zibCKU7xDny4g==, tableContent=null), ArticleFig(id=1241049287317058113, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049267482194073, language=CN, label=图5, caption=
尺度参数L对vzx的影响, figureFileSmall=usqrBT+UkAgeTs2ohB5YVg==, figureFileBig=srtQOgBA1zibCKU7xDny4g==, tableContent=null), ArticleFig(id=1241049287581299272, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049267482194073, language=EN, label=Fig.6, caption=
Effect of the scale parameter L on vzy, figureFileSmall=c4Cpp+SdoNlbkgh7aFJHCA==, figureFileBig=DT8cx5tehXtmdT2biLqlFA==, tableContent=null), ArticleFig(id=1241049287757460048, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049267482194073, language=CN, label=图6, caption=
尺度参数L对vzy的影响, figureFileSmall=c4Cpp+SdoNlbkgh7aFJHCA==, figureFileBig=DT8cx5tehXtmdT2biLqlFA==, tableContent=null), ArticleFig(id=1241049287929426519, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049267482194073, language=EN, label=Fig.7, caption=
Effect of the scale parameter L on E*/E, figureFileSmall=Ivarn6l59E5gbGNa+4wPmw==, figureFileBig=9V+U89gAEIgebLu+0by2fA==, tableContent=null), ArticleFig(id=1241049288059449950, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049267482194073, language=CN, label=图7, caption=
尺度参数L对E*/E的影响, figureFileSmall=Ivarn6l59E5gbGNa+4wPmw==, figureFileBig=9V+U89gAEIgebLu+0by2fA==, tableContent=null), ArticleFig(id=1241049288252387939, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049267482194073, language=EN, label=Fig.8, caption=
Effect of the inner concave angle θ on νzx, figureFileSmall=7pAUmZvvS2SRYEJuphW6VA==, figureFileBig=utxxj8OQJo486DVJUHVrjg==, tableContent=null), ArticleFig(id=1241049289997218409, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049267482194073, language=CN, label=图8, caption=
内凹角θ对νzx的影响, figureFileSmall=7pAUmZvvS2SRYEJuphW6VA==, figureFileBig=utxxj8OQJo486DVJUHVrjg==, tableContent=null), ArticleFig(id=1241049290676695663, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049267482194073, language=EN, label=Fig.9, caption=
Effect of the inner concave angle θ on νzy, figureFileSmall=hWsxpPO6Kw95PPR39MMw2g==, figureFileBig=dCBkjal9OLq6amIR9EJocg==, tableContent=null), ArticleFig(id=1241049290840273525, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049267482194073, language=CN, label=图9, caption=
内凹角θ对νzy的影响, figureFileSmall=hWsxpPO6Kw95PPR39MMw2g==, figureFileBig=dCBkjal9OLq6amIR9EJocg==, tableContent=null), ArticleFig(id=1241049290940936828, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049267482194073, language=EN, label=Fig.10, caption=
Effect of the inner concave angle θ on E*/E, figureFileSmall=jmzj8XCaMBJEY2j+5MHPXw==, figureFileBig=U1dBoRLnuPSLsNneMiysCQ==, tableContent=null), ArticleFig(id=1241049291037405825, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049267482194073, language=CN, label=图10, caption=
内凹角θ对E*/E的影响, figureFileSmall=jmzj8XCaMBJEY2j+5MHPXw==, figureFileBig=U1dBoRLnuPSLsNneMiysCQ==, tableContent=null), ArticleFig(id=1241049291159040650, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049267482194073, language=EN, label=Fig.11, caption=
Effect of the cross-sectional dimension β on νzx, figureFileSmall=C5UlRxhQkqflLbTBV4fJCA==, figureFileBig=kOz9iFZGrsPIQUCb2MJTzw==, tableContent=null), ArticleFig(id=1241049291398115983, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049267482194073, language=CN, label=图11, caption=
横截面尺寸β对νzx的影响, figureFileSmall=C5UlRxhQkqflLbTBV4fJCA==, figureFileBig=kOz9iFZGrsPIQUCb2MJTzw==, tableContent=null), ArticleFig(id=1241049291494584979, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049267482194073, language=EN, label=Fig.12, caption=
Effect of the cross-sectional dimension β on νzy, figureFileSmall=Wlll0yniNarh0Zma0flynQ==, figureFileBig=jojBX/x5+hwpPV8lru/7Pw==, tableContent=null), ArticleFig(id=1241049291624608409, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049267482194073, language=CN, label=图12, caption=
横截面尺寸β对νzy的影响, figureFileSmall=Wlll0yniNarh0Zma0flynQ==, figureFileBig=jojBX/x5+hwpPV8lru/7Pw==, tableContent=null), ArticleFig(id=1241049291901432481, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049267482194073, language=EN, label=Fig.13, caption=
Effect of cross-sectional dimension β onE*/E, figureFileSmall=moRvKZOIqg2TrCAKJLYJKw==, figureFileBig=solbr8VL9xI6uvwjyiU/1w==, tableContent=null), ArticleFig(id=1241049292018872999, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049267482194073, language=CN, label=图13, caption=
横截面尺寸β对E*/E的影响, figureFileSmall=moRvKZOIqg2TrCAKJLYJKw==, figureFileBig=solbr8VL9xI6uvwjyiU/1w==, tableContent=null), ArticleFig(id=1241049292216005292, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049267482194073, language=EN, label=Fig.14, caption=
Specimen prepared by 3D printing, figureFileSmall=yeKqz+yEOsQU4eCWO/B3Vg==, figureFileBig=Ywxn62rB55asmHUI6GGFKQ==, tableContent=null), ArticleFig(id=1241049292375388847, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049267482194073, language=CN, label=图14, caption=
3D打印制备的试件, figureFileSmall=yeKqz+yEOsQU4eCWO/B3Vg==, figureFileBig=Ywxn62rB55asmHUI6GGFKQ==, tableContent=null), ArticleFig(id=1241049292639630003, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049267482194073, language=EN, label=Fig.15, caption=
Test and finite element comparison of νzx, figureFileSmall=J5W06mmzn7uMPGrBJ1EELg==, figureFileBig=NKYc15lqF5qCJ1SHvl06fA==, tableContent=null), ArticleFig(id=1241049294388654778, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049267482194073, language=CN, label=图15, caption=
νzx的试验和有限元比较, figureFileSmall=J5W06mmzn7uMPGrBJ1EELg==, figureFileBig=NKYc15lqF5qCJ1SHvl06fA==, tableContent=null), ArticleFig(id=1241049294539649728, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049267482194073, language=EN, label=Fig.16, caption=
Test and finite element comparison of E*/E, figureFileSmall=BYP8cJtTYdFeaiUoPqlx1g==, figureFileBig=wQcSdEs4qHZ4O2glk22SlA==, tableContent=null), ArticleFig(id=1241049294627730116, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049267482194073, language=CN, label=图16, caption=
E*/E的试验和有限元比较, figureFileSmall=BYP8cJtTYdFeaiUoPqlx1g==, figureFileBig=wQcSdEs4qHZ4O2glk22SlA==, tableContent=null)], attaches=null, journal=Journal(id=1227999351742652416, delFlag=0, nameCn=机械强度, nameEn=Journal of Mechanical Strength, nameHistory1=null, nameHistory2=null, issn=1001-9669, eissn=null, cn=41-1134/TH, coden=null, periodic=0, language=CN, oaType=null, ccby=null, superviseOffice=null, ownerOffice=null, pubOffice=null, editorOffice=null, officeType=null, aims=null, clcCode=null, officeProv=null, officeCity=null, officeAddr=null, officeZip=null, officeEmail=null, officePhone=null, editDirector=null, officeDirector=null, officeDirectorPhone=null, officeStaffNum=null, officeEmpNum=null, coverPicUrl=9ETNXOzwmuGm49pLRqXxWw==, journalPrice=null, startedYear=null, abbrevIsoEn=Journal of Mechanical Strength, journalRemark=null, publicationField=null, createdTime=1770707460585, updatedTime=1770707700588, createdBy=18614031015, updatedBy=13701087609, firstLetterCn=J, firstLetterEn=J, 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