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首页> 外文期刊>International journal of mechanics and materials in design >Numerical and theoretical analysis of the dynamic mechanical behaviour of a modified rhombic dodecahedron lattice structure
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Numerical and theoretical analysis of the dynamic mechanical behaviour of a modified rhombic dodecahedron lattice structure

机译：改进的菱形十二锭晶格结构的动态力学行为的数值与理论分析

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摘要

Metallic lattice structures have been widely utilized in different fields such as automobile, aerospace and so on, owing to their superior mechanical properties and energy absorption characteristics. In this paper, the enhanced dynamic mechanical properties of the modified rhombic dodecahedron (RD) lattice structures were investigated systematically through numerical simulation and theoretical analysis. Results indicated that compressive modulus, initial yield strength and normalized specific energy absorption (SEA) of the modified RD lattice structures all exhibited a quadratic growth trend with the increase of relative density beyond following the traditional law. Meanwhile, the plateau stress and normalized SEA exhibited certain sensitivity to the strain rate and almost linearly increased as the loading rate increased. Finally, a modified rigid-perfectly plastic-locking shock wave model was also proposed, and the predicted results of the proposed modified shock wave model were consistent with the simulation results.
机译：由于其优越的机械性能和能量吸收特性，金属晶格结构已广泛用于不同的领域，如汽车，航空航天等。本文通过数值模拟和理论分析系统地研究了改进的菱形十二锭（RD）晶格结构的增强动态力学性能。结果表明，改性RD晶格结构的压缩模量，初始屈服强度和归一化的特异性能量吸收（海）随着传统法之后的相对密度的增加而呈现二次生长趋势。同时，随着装载速率的增加，高原应力和标准化海面对应变速率表现出一定的敏感性，几乎线性增加。最后，还提出了一种改进的刚性完美的塑料锁定冲击波模型，所提出的改进的冲击波模型的预测结果与模拟结果一致。

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    Cao Xiaofei; Ren Xianben; Zhao Tian; Li Ying; Xiao Dengbao; Fang Daining;

  • 作者单位

    Beijing Inst Technol Inst Adv Struct Technol Beijing Key Lab Lightweight Multifunct Composite Beijing 100081 Peoples R China|Beijing Inst Technol State Key Lab Explos Sci & Technol Beijing 100081 Peoples R China;

    Beijing Inst Technol Inst Adv Struct Technol Beijing Key Lab Lightweight Multifunct Composite Beijing 100081 Peoples R China|Beijing Inst Technol State Key Lab Explos Sci & Technol Beijing 100081 Peoples R China;

    Beijing Inst Technol Inst Adv Struct Technol Beijing Key Lab Lightweight Multifunct Composite Beijing 100081 Peoples R China;

    Beijing Inst Technol Inst Adv Struct Technol Beijing Key Lab Lightweight Multifunct Composite Beijing 100081 Peoples R China|Beijing Inst Technol State Key Lab Explos Sci & Technol Beijing 100081 Peoples R China;

    Beijing Inst Technol Inst Adv Struct Technol Beijing Key Lab Lightweight Multifunct Composite Beijing 100081 Peoples R China|Beijing Inst Technol State Key Lab Explos Sci & Technol Beijing 100081 Peoples R China;

    Beijing Inst Technol Inst Adv Struct Technol Beijing Key Lab Lightweight Multifunct Composite Beijing 100081 Peoples R China|Beijing Inst Technol State Key Lab Explos Sci & Technol Beijing 100081 Peoples R China;

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  • 正文语种 eng
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  • 关键词

    Lattice structure; Rhombic dodecahedron; Dynamic mechanical properties; Shock wave model;

    机译：格子结构;菱形十二锭;动态机械性能;冲击波模型;

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