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Minimal surfaces are characterized by spatially continuous smoothness, which can effectively avoid the problem of the stress concentration, and have become a significant focus in the research of mechanical metamaterials. A Scherk single-periodic minimal surface (SPMS) was studied, and the spatially continuous smooth geometrical model was generated using a voxel reconstruction technique with multi-software association method. The mechanical behavior and energy absorption characteristics of the single-period Scherk surface structure were investigated using finite element simulation. The impact of the mathematical parameters of the minimal surface on the geometric configuration was examined.Five minimal surfaces with different parameters were established, and the deformation patterns and stress distributions of the five structures were explored under positive and lateral compression conditions. The Scherk surface structures were fabricated by metal printing technology, and quasi-static compression tests were conducted. The results show that the Scherk single-period surface has an obvious negative Poisson ratio effect, and the SPMS structure exhibits X-and V-shaped deformation modes, which can well withstand the external loading effects. The compression tests show the hump phenomenon of the reaction force and displacement curves of the SPMS structure, indicating that the structure has a negative Poisson ratio and negative stiffness property. This property provides a wide space for its application research in large deformation damage and structural energy absorption.
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极小曲面具有空间连续光滑的特点,能够有效避免应力集中问题,成为力学超材料研究的重要关注方向。研究了一种Scherk单周期极小曲面(Single-Periodic Minimal Surface, SPMS),采用体素重构技术多软件联合生成了空间连续光滑几何模型。利用有限元仿真探究了单周期Scherk曲面结构的力学行为和能量吸收特性。分析了极小曲面数学参数对几何构型的影响规律,建立了五种不同参数的极小曲面,探求了在正压和侧压的条件下,五种结构的变形模式与应力分布。借助金属打印技术制作了Scherk曲面结构,并进行了准静态压缩试验。结果表明,Scherk单周期曲面具有明显的负泊松比效应,SPMS结构呈现的X形和V形变形模式,能够很好地承受外载荷作用。压缩试验表明,SPMS结构反力和位移曲线呈现驼峰现象,说明该结构表现出负泊松比和负刚度特性,该特性为其在几何大变形和能量吸收方面的应用研究提供了广阔的空间。
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王帅,男,1987年生,河南南阳人,硕士,副教授;主要研究方向为机械设计和力学超材料等领域;E-mail:ws15993500427@163.com。
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王帅,男,1987年生,河南南阳人,硕士,副教授;主要研究方向为机械设计和力学超材料等领域;E-mail:ws15993500427@163.com。
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侧向压缩静力学性能, figureFileSmall=1KkdGVnPBlbMyPnLVKLLkw==, figureFileBig=oZNL4+JlO69xt+IJy71eRQ==, tableContent=null), ArticleFig(id=1241451348508602921, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408882766050137, language=EN, label=Fig.11, caption=
Statics performance under the forward compression, figureFileSmall=gcE7UyvbPk9v7eM9gYNaBQ==, figureFileBig=1gXHOyawHXMAeb80E9OnrQ==, tableContent=null), ArticleFig(id=1241451348617654831, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408882766050137, language=CN, label=图11, caption=
正向压缩静力学性能, figureFileSmall=gcE7UyvbPk9v7eM9gYNaBQ==, figureFileBig=1gXHOyawHXMAeb80E9OnrQ==, tableContent=null), ArticleFig(id=1241451348726706738, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408882766050137, language=EN, label=Fig.12, caption=
Static compression test device, figureFileSmall=mky3naRN7cBth3mRTu/YPQ==, figureFileBig=2sXwdybHS8chbfWL+svAlA==, tableContent=null), ArticleFig(id=1241451348831564346, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408882766050137, language=CN, label=图12, caption=
静力压缩试验装置, figureFileSmall=mky3naRN7cBth3mRTu/YPQ==, figureFileBig=2sXwdybHS8chbfWL+svAlA==, tableContent=null), ArticleFig(id=1241451348953199166, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408882766050137, language=EN, label=Fig.13, caption=
Process of the compression deformation, figureFileSmall=rocBuiG3CdF4jAxSl9wZNw==, figureFileBig=QsKbaglj8ncc6rZCB7BjNg==, tableContent=null), ArticleFig(id=1241451349049668164, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408882766050137, language=CN, label=图13, caption=
压缩变形过程, figureFileSmall=rocBuiG3CdF4jAxSl9wZNw==, figureFileBig=QsKbaglj8ncc6rZCB7BjNg==, tableContent=null), ArticleFig(id=1241451349183885901, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408882766050137, language=EN, label=Fig.14, caption=
Compression deformation results of specimens, figureFileSmall=YOmh8s9oG8jQOx8qy2ODvw==, figureFileBig=8j1Phf7F3adW5P4k9CwOvw==, tableContent=null), ArticleFig(id=1241451349271966289, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408882766050137, language=CN, label=图14, caption=
试样压缩变形结果, figureFileSmall=YOmh8s9oG8jQOx8qy2ODvw==, figureFileBig=8j1Phf7F3adW5P4k9CwOvw==, tableContent=null), ArticleFig(id=1241451349360046677, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408882766050137, language=EN, label=Fig.15, caption=
Test counter force and strain, figureFileSmall=N6evMh9p5RX4mqpfR5v/Ng==, figureFileBig=OuITIiwFChrJdowO6hD35Q==, tableContent=null), ArticleFig(id=1241451349448127066, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408882766050137, language=CN, label=图15, caption=
试验反力与应变, figureFileSmall=N6evMh9p5RX4mqpfR5v/Ng==, figureFileBig=OuITIiwFChrJdowO6hD35Q==, tableContent=null), ArticleFig(id=1241451349615899232, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408882766050137, language=EN, label=Fig.16, caption=
SPMS Poisson ratio, figureFileSmall=1AS+XxNcNS162inXEnFVAg==, figureFileBig=O0I6z4zNLcl26rnppl3SEw==, tableContent=null), ArticleFig(id=1241451349729145445, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408882766050137, language=CN, label=图16, caption=
SPMS泊松比, figureFileSmall=1AS+XxNcNS162inXEnFVAg==, figureFileBig=O0I6z4zNLcl26rnppl3SEw==, tableContent=null), ArticleFig(id=1241451349917889133, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408882766050137, language=EN, label=Fig.17, caption=
Test counter-force and finite element counter-force, figureFileSmall=mxPC66euTX9GejPeEJ15Iw==, figureFileBig=zy5J4Pqa/RUWFjdJwbZY+Q==, tableContent=null), ArticleFig(id=1241451351398478452, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408882766050137, language=CN, label=图17, caption=
试验反力与有限元反力, figureFileSmall=mxPC66euTX9GejPeEJ15Iw==, figureFileBig=zy5J4Pqa/RUWFjdJwbZY+Q==, tableContent=null), ArticleFig(id=1241451351507530359, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408882766050137, language=EN, label=Tab.1, caption=
Contact relation
, figureFileSmall=null, figureFileBig=null, tableContent=
名称 Name | 接触类型 Contact type | 关键字 Keyword |
|---|
上顶板与Scherk曲面之间 接触 Contact between the top plate and Scherk surface | 面-面接触 Surface-to-surface contact | CONTACT_AUTO MATIC_SURFAC E_TO_SURFACE |
下底板与Scherk曲面之间接触 Contact between the bottom plate and Scherk surface | 面-面接触 Surface-to-surface contact | CONTACT_AUTO MATIC_SURFAC E_TO_SURFACE |
极小曲面夹层自接触 Self contact of the minimal surface sandwich | 自接触 Self contact | CONTACT_AUTO MATIC_SINGLE_ SURFACE |
), ArticleFig(id=1241451351620776569, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408882766050137, language=CN, label=表1, caption=
接触关系
, figureFileSmall=null, figureFileBig=null, tableContent=
名称 Name | 接触类型 Contact type | 关键字 Keyword |
|---|
上顶板与Scherk曲面之间 接触 Contact between the top plate and Scherk surface | 面-面接触 Surface-to-surface contact | CONTACT_AUTO MATIC_SURFAC E_TO_SURFACE |
下底板与Scherk曲面之间接触 Contact between the bottom plate and Scherk surface | 面-面接触 Surface-to-surface contact | CONTACT_AUTO MATIC_SURFAC E_TO_SURFACE |
极小曲面夹层自接触 Self contact of the minimal surface sandwich | 自接触 Self contact | CONTACT_AUTO MATIC_SINGLE_ SURFACE |
), ArticleFig(id=1241451351754994303, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408882766050137, language=EN, label=Tab.2, caption=
Parameters of the structural steel
, figureFileSmall=null, figureFileBig=null, tableContent=
密度 Density ρ/(kg/m3) | 弹性模量 Modulus of elasticity/MPa | 屈服强度 Yield strength Re/MPa | 切线模量 Tangent modulus Et/MPa | 泊松比 Poisson ratio ν | 失效应变 Failure strain εf |
|---|
| 7 850 | 210 000 | 250 | 2 100 | 0.3 | 0.6 |
), ArticleFig(id=1241451351872434821, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408882766050137, language=CN, label=表2, caption=
结构钢材料参数
, figureFileSmall=null, figureFileBig=null, tableContent=
密度 Density ρ/(kg/m3) | 弹性模量 Modulus of elasticity/MPa | 屈服强度 Yield strength Re/MPa | 切线模量 Tangent modulus Et/MPa | 泊松比 Poisson ratio ν | 失效应变 Failure strain εf |
|---|
| 7 850 | 210 000 | 250 | 2 100 | 0.3 | 0.6 |
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