Quantitative analysis of deformation mechanisms in pantographic substructures: experiments and modeling

Quantitative analysis of deformation mechanisms in pantographic substructures: experiments and modeling
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缩放子结构变形机制的定量分析:实验和建模

DOI:
10.1007/s00161-018-0678-y
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发表时间:
2018
影响因子:
2.6
通讯作者:
Lekszycki, Tomasz
Lekszycki, Tomasz
中科院分区:
工程技术3区
文献类型:
--
作者:
Turco, Emilio;Misra, Anil;Sarikaya, Rizacan;Lekszycki, Tomasz

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为了获得受电弓基本子结构和元件的力学行为的详细信息,用聚酰胺粉末烧结了小尺寸试件,该试件由三对正交梁通过枢轴相连形成受电弓单元。通过将实验数据与改进的Piola-Hencky模型进行比较,研究了相互连接的枢轴和组合梁的力学特性。实验结果与预测结果的一致使我们可以估算出:(I)连通支点的宏观剪切刚度(对应于微观扭转刚度),(Ii)组成梁的拉伸刚度和(Iii)弯曲刚度。
In order to get detailed information about the mechanical behavior of pantographic elementary substructure and elements, small-scale specimens were sintered using polyamide powder, constituted by three orthogonal pairs of beams interconnected through pivots forming pantographic cells. The mechanical properties of interconnecting pivots and constituting beams are investigated by comparing experimental evidence with an enhanced Piola–Hencky model. The careful agreement between experimental and predicted results allows us to estimate: (i) the macro-shear stiffness of interconnecting pivots (corresponding to micro-torsional stiffness), (ii) extensional stiffness and (iii) bending stiffness of constituting beams.
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