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In order to improve the carrying capacity of double curved beams negative stiffness structure composed of two curved beams arranged in parallel, the curved sandwich beam negative stiffness structure was proposed. The design idea was to array the sandwich straight beam between the upper and lower curved beams of the double curved beam negative stiffness structure, and the bearing capacity and energy absorption characteristics were studied systematically. Firstly, the negative stiffness structure model was fabricated using 3D printing technology and silicone emolding process, the compressive mechanical response of the curved sandwich beam and double curved beam negative stiffness structure was compared and analyzed by quasi-static compression experiment, and the reliability of the finite element simulation model was verified. Then,the influence of structural parameters (width, spacing, height and angle) of the sandwich straight beam on the bearing capacity and energy absorption characteristics of the negative stiffness structure was studied by simulation. The results indicate that the introduction of the sandwich significantly enhances the load-bearing capacity of the double curved beam negative stiffness structure. Compared with the spacing and angle of the sandwich straight beam, increasing the width and height of the sandwich straight beams can notably enhance the load-bearing capacity and energy absorption capacity of the structure.
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为了提高由2个曲梁平行布置所组成的双曲梁负刚度结构的承载能力,提出了夹芯曲梁负刚度结构,设计思路为在双曲梁负刚度结构的上、下曲梁之间阵列夹层直梁,对其承载能力和吸能性能进行了系统研究。首先,采用3D打印技术与硅胶复模工艺制备了负刚度结构模型,通过准静态压缩试验,对比分析了夹芯曲梁负刚度结构与双曲梁负刚度结构的压缩力学响应,同时验证了有限元仿真模型的可靠性。其次,仿真分析了夹芯中夹层直梁的结构参数(宽度、间距、高度和角度)对夹芯曲梁负刚度结构承载能力和能量吸收特性的影响。结果表明,夹芯的引入可以显著改善双曲梁负刚度结构的承载能力;与夹层直梁间距和角度相比,增加夹层直梁宽度和高度可以显著增强结构的承载能力和能量吸收能力。
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江伟,男,1997年生,江苏盐城人,硕士研究生;主要研究方向为机械设计及理论;E-mail:1771591660@qq.com。
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江伟,男,1997年生,江苏盐城人,硕士研究生;主要研究方向为机械设计及理论;E-mail:1771591660@qq.com。
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负刚度结构试验模型, figureFileSmall=LNzzRVMmj62PZkfG8arLWg==, figureFileBig=mFFj/25ahnqQRILRKRWGcA==, tableContent=null), ArticleFig(id=1241049286557881236, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049261517885844, language=EN, label=Fig.3, caption=
Test device, figureFileSmall=Etv7li/3Lxg6wp3RH+JMDQ==, figureFileBig=InrwnchMgeRU07Qd+r+gjw==, tableContent=null), ArticleFig(id=1241049286784373658, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049261517885844, language=CN, label=图3, caption=
试验装置, figureFileSmall=Etv7li/3Lxg6wp3RH+JMDQ==, figureFileBig=InrwnchMgeRU07Qd+r+gjw==, tableContent=null), ArticleFig(id=1241049286977311647, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049261517885844, language=EN, label=Fig.4, caption=
Standard tensile test results for materials, figureFileSmall=UdEnLpnjulB8Tb0FXfuSoQ==, figureFileBig=JUBT/jTyD/ZFxqIBzg38gg==, tableContent=null), ArticleFig(id=1241049287103140778, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049261517885844, language=CN, label=图4, caption=
材料标准拉伸试验结果, figureFileSmall=UdEnLpnjulB8Tb0FXfuSoQ==, figureFileBig=JUBT/jTyD/ZFxqIBzg38gg==, tableContent=null), ArticleFig(id=1241049287254135732, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049261517885844, language=EN, label=Fig.5, caption=
Test force-displacement curves of two kinds of curved beams, figureFileSmall=BfCduwZDOw4onDmoneMkRw==, figureFileBig=OIjhdUi5U8PlKUDzA0mm8w==, tableContent=null), ArticleFig(id=1241049287409324982, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049261517885844, language=CN, label=图5, caption=
2种曲梁试验力-位移曲线, figureFileSmall=BfCduwZDOw4onDmoneMkRw==, figureFileBig=OIjhdUi5U8PlKUDzA0mm8w==, tableContent=null), ArticleFig(id=1241049287640011710, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049261517885844, language=EN, label=Fig.6, caption=
Boundary conditions of the simulation model, figureFileSmall=rCSY/kibm9N0jNj2/RPlGw==, figureFileBig=PkaPytVtFNqnWrTdouuDUQ==, tableContent=null), ArticleFig(id=1241049287749063620, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049261517885844, language=CN, label=图6, caption=
仿真模型的边界条件设置, figureFileSmall=rCSY/kibm9N0jNj2/RPlGw==, figureFileBig=PkaPytVtFNqnWrTdouuDUQ==, tableContent=null), ArticleFig(id=1241049287912641479, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049261517885844, language=EN, label=Fig.7, caption=
Analysis of the mesh size convergence and boundary conditions, figureFileSmall=FUsLKT2w251RbKfUrnC2Fg==, figureFileBig=/f55c27Trp6jB39SqoavNg==, tableContent=null), ArticleFig(id=1241049288042664909, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049261517885844, language=CN, label=图7, caption=
网格尺寸的收敛性及边界条件分析, figureFileSmall=FUsLKT2w251RbKfUrnC2Fg==, figureFileBig=/f55c27Trp6jB39SqoavNg==, tableContent=null), ArticleFig(id=1241049288197854159, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049261517885844, language=EN, label=Fig.8, caption=
Comparison between test and simulation, figureFileSmall=llHgxqNRBaZtA0aUA88WMg==, figureFileBig=jmjEzndYruLJHP8sD71Nbg==, tableContent=null), ArticleFig(id=1241049289984627669, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049261517885844, language=CN, label=图8, caption=
试验与仿真对比, figureFileSmall=llHgxqNRBaZtA0aUA88WMg==, figureFileBig=jmjEzndYruLJHP8sD71Nbg==, tableContent=null), ArticleFig(id=1241049290680882137, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049261517885844, language=EN, label=Fig.9, caption=
Process of structural compression deformation, figureFileSmall=NITnE99kmRJrKNVbJ/R4Qw==, figureFileBig=7Q0ThhmnoJGfpNWn/QvWXw==, tableContent=null), ArticleFig(id=1241049290836071392, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049261517885844, language=CN, label=图9, caption=
结构压缩变形过程, figureFileSmall=NITnE99kmRJrKNVbJ/R4Qw==, figureFileBig=7Q0ThhmnoJGfpNWn/QvWXw==, tableContent=null), ArticleFig(id=1241049290932540384, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049261517885844, language=EN, label=Fig.10, caption=
Force-displacement curves and peak-valley values for different sandwich straight beam width, figureFileSmall=A9hsv+K0Eg2eXuax38tImw==, figureFileBig=899Q2NNDN96+4td6r31C9Q==, tableContent=null), ArticleFig(id=1241049291033203685, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049261517885844, language=CN, label=图10, caption=
不同夹层直梁宽度下的力-位移曲线及峰谷值, figureFileSmall=A9hsv+K0Eg2eXuax38tImw==, figureFileBig=899Q2NNDN96+4td6r31C9Q==, tableContent=null), ArticleFig(id=1241049291159032811, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049261517885844, language=EN, label=Fig.11, caption=
Energy absorption capacity for different sandwich straight beam width, figureFileSmall=LYVAXLcctx0KUE1RxPwKsg==, figureFileBig=3rdpSQVvHVhO5EqRCg4PoQ==, tableContent=null), ArticleFig(id=1241049291419079659, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049261517885844, language=CN, label=图11, caption=
不同夹层直梁宽度下的能量吸收能力, figureFileSmall=LYVAXLcctx0KUE1RxPwKsg==, figureFileBig=3rdpSQVvHVhO5EqRCg4PoQ==, tableContent=null), ArticleFig(id=1241049291591046131, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049261517885844, language=EN, label=Fig.12, caption=
Force-displacement curves and peak-valley value for different sandwich straight beam spacing, figureFileSmall=Xg9B46VDJGqBgiYhHspvig==, figureFileBig=zN9XG9barFq5Stzu7qB7YQ==, tableContent=null), ArticleFig(id=1241049291859481590, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049261517885844, language=CN, label=图12, caption=
不同夹层直梁间距下的力-位移曲线及峰谷值, figureFileSmall=Xg9B46VDJGqBgiYhHspvig==, figureFileBig=zN9XG9barFq5Stzu7qB7YQ==, tableContent=null), ArticleFig(id=1241049291985310714, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049261517885844, language=EN, label=Fig.13, caption=
Energy absorption capacity for different sandwich straight beam spacing, figureFileSmall=Vczs9qmjTa9hC1ExMftTdw==, figureFileBig=80Ion5zYXHhjl5aeJWhbbg==, tableContent=null), ArticleFig(id=1241049292211803136, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049261517885844, language=CN, label=图13, caption=
不同夹层直梁间距下的能量吸收能力, figureFileSmall=Vczs9qmjTa9hC1ExMftTdw==, figureFileBig=80Ion5zYXHhjl5aeJWhbbg==, tableContent=null), ArticleFig(id=1241049292366992385, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049261517885844, language=EN, label=Fig.14, caption=
Force-displacement curves and peak-valley values for different sandwich straight beam height change, figureFileSmall=jed0VS1Zv8DY3Kcu06hgXA==, figureFileBig=qWEpCRHgew+Q5Xo4n0+a3A==, tableContent=null), ArticleFig(id=1241049292631232515, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049261517885844, language=CN, label=图14, caption=
夹层直梁高度变化力-位移曲线及峰谷值, figureFileSmall=jed0VS1Zv8DY3Kcu06hgXA==, figureFileBig=qWEpCRHgew+Q5Xo4n0+a3A==, tableContent=null), ArticleFig(id=1241049294384451589, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049261517885844, language=EN, label=Fig.15, caption=
Energy absorption capacity for different sandwich straight beam height, figureFileSmall=+iBfrSiqz9fEpsp97W0xLw==, figureFileBig=5cOCf20Kl7mjJW9hy+HJSw==, tableContent=null), ArticleFig(id=1241049294539640842, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049261517885844, language=CN, label=图15, caption=
不同夹层直梁高度下的能量吸收能力, figureFileSmall=+iBfrSiqz9fEpsp97W0xLw==, figureFileBig=5cOCf20Kl7mjJW9hy+HJSw==, tableContent=null), ArticleFig(id=1241049294636109838, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049261517885844, language=EN, label=Fig.16, caption=
Force-displacemen curves and peak-valley values for different sandwich straight beam angle, figureFileSmall=Z2aB9IFpbkAzdOQt+hOPEw==, figureFileBig=lafVYdM2BXWB/D7rfvo6Vg==, tableContent=null), ArticleFig(id=1241049294770327570, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049261517885844, language=CN, label=图16, caption=
不同夹层直梁角度下的力-位移曲线及峰谷值, figureFileSmall=Z2aB9IFpbkAzdOQt+hOPEw==, figureFileBig=lafVYdM2BXWB/D7rfvo6Vg==, tableContent=null), ArticleFig(id=1241049295147814932, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049261517885844, language=EN, label=Fig.17, caption=
Energy absorption capacity for different sandwich straight beam angle, figureFileSmall=rCIWzYVhzHzNxeWhEHzjcQ==, figureFileBig=yxen8XKt+voWWLVlwWo8uQ==, tableContent=null), ArticleFig(id=1241049295256866843, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049261517885844, language=CN, label=图17, caption=
不同夹层直梁角度下的能量吸收能力, figureFileSmall=rCIWzYVhzHzNxeWhEHzjcQ==, figureFileBig=yxen8XKt+voWWLVlwWo8uQ==, tableContent=null), ArticleFig(id=1241049295370113053, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049261517885844, language=EN, label=Fig.18, caption=
Force-displacement curve and local deformation of A30, figureFileSmall=Tq5qqUtbiWFX6AaFAIbUMQ==, figureFileBig=gFZdAGRwxqDPSexnf3/6DA==, tableContent=null), ArticleFig(id=1241049295554662435, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049261517885844, language=CN, label=图18, caption=
A30力-位移曲线和局部变形, figureFileSmall=Tq5qqUtbiWFX6AaFAIbUMQ==, figureFileBig=gFZdAGRwxqDPSexnf3/6DA==, tableContent=null), ArticleFig(id=1241049295680491557, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049261517885844, language=EN, label=Fig.19, caption=
Test force-displacement curves for different sandwich straight beam parameters, figureFileSmall=2Sms+omHmnQy1XXwfD1oHQ==, figureFileBig=tc6lln3KYfGLaPxBC7W8PA==, tableContent=null), ArticleFig(id=1241049295823097897, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049261517885844, language=CN, label=图19, caption=
不同夹层直梁参数下的试验力-位移曲线, figureFileSmall=2Sms+omHmnQy1XXwfD1oHQ==, figureFileBig=tc6lln3KYfGLaPxBC7W8PA==, tableContent=null), ArticleFig(id=1241049295911178282, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049261517885844, language=EN, label=Fig.20, caption=
Comparison of simulation and test peak-valley values for different sandwich straight beam parameters, figureFileSmall=R6tndlGQnMUoTKA9spAMDQ==, figureFileBig=/57p2iP+i8sNO020uJzBxw==, tableContent=null), ArticleFig(id=1241049296028618800, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049261517885844, language=CN, label=图20, caption=
不同夹层直梁参数变化的试验和仿真峰谷值比较, figureFileSmall=R6tndlGQnMUoTKA9spAMDQ==, figureFileBig=/57p2iP+i8sNO020uJzBxw==, tableContent=null), ArticleFig(id=1241049296263499827, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049261517885844, language=EN, label=Fig.21, caption=
Comparison of simulation and test energy absorption capacity for different sandwich straight beam parameters, figureFileSmall=6X/SUkWOf3k7uXgJviISOw==, figureFileBig=VePYvktzGdYTUvwgppZi2Q==, tableContent=null), ArticleFig(id=1241049296418689080, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049261517885844, language=CN, label=图21, caption=
不同夹层直梁参数下的试验和仿真能量吸收能力比较, figureFileSmall=6X/SUkWOf3k7uXgJviISOw==, figureFileBig=VePYvktzGdYTUvwgppZi2Q==, tableContent=null), ArticleFig(id=1241049296628404285, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049261517885844, language=EN, label=Tab.1, caption=
Structural parameters of curved sandwich beams and double curved beams
, figureFileSmall=null, figureFileBig=null, tableContent=
| H/mm | L/mm | T/mm | D/mm | W/mm | S/mm | A/(°) |
|---|
夹芯曲梁 Curved sandwich beam | 16 | 80 | 1.3 | 2.1 | 0.9 | 1.4 | 10 |
双曲梁 Double curved beam | 16 | 80 | 1.3 | — | — | — | — |
), ArticleFig(id=1241049296905228353, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049261517885844, language=CN, label=表1, caption=
夹芯曲梁和双曲梁的结构参数
, figureFileSmall=null, figureFileBig=null, tableContent=
| H/mm | L/mm | T/mm | D/mm | W/mm | S/mm | A/(°) |
|---|
夹芯曲梁 Curved sandwich beam | 16 | 80 | 1.3 | 2.1 | 0.9 | 1.4 | 10 |
双曲梁 Double curved beam | 16 | 80 | 1.3 | — | — | — | — |
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