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首页> 外文期刊>Smart Materials & Structures >Shape forming by thermal expansion mismatch and shape memory locking in polymer/elastomer laminates
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Shape forming by thermal expansion mismatch and shape memory locking in polymer/elastomer laminates

机译：通过热膨胀不匹配形成的形状和塑造材料锁定在聚合物/弹性体层压板中

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摘要

This paper studies a novel method to fabricate three-dimensional (3D) structure from 2D thermo-responsive shape memory polymer (SMP)/elastomer bilayer laminate. In this method, the shape change is actuated by the thermal mismatch strain between the SMP and the elastomer layers upon heating. However, the glass transition behavior of the SMP locks the material into a new 3D shape that is stable even upon cooling. Therefore, the second shape becomes a new permanent shape of the laminate. A theoretical model that accounts for the temperature-dependent thermomechanical behavior of the SMP material and thermal mismatch strain between the two layers is developed to better understand the underlying physics. Model predictions and experiments show good agreement and indicate that the theoretical model can well predict the bending behavior of the bilayer laminate. The model is then used in the optimal design of geometrical configuration and material selection. The latter also illustrates the requirement of thermomechanical behaviors of the SMP to lock the shape. Based on the fundamental understandings, several self-folding structures are demonstrated by the bilayer laminate design.
机译：本文研究了一种新的方法，从2D热响应形状记忆聚合物（SMP）/弹性体双层层压体中制造三维（3D）结构。在该方法中，在加热时通过SMP和弹性体层之间的热失配应变来致动形状变化。然而，即使在冷却时，SMP的玻璃化转换行为将材料锁定为新的3D形状，这是稳定的。因此，第二形状成为层压板的新永久形状。开发了一种理论模型，其考虑了两层之间的SMP材料和热失配应变的温度依赖热机械行为，以更好地了解潜在的物理学。模型预测和实验表明了良好的一致性，并表明理论模型可以很好地预测双层层压板的弯曲行为。然后在几何配置和材料选择的最佳设计中使用该模型。后者还说明了SMP的热机械行为的要求以锁定形状。基于基础谅解，双层层压设计证明了几种自折叠结构。

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  • 来源
    《Smart Materials & Structures》 |2017年第10期|共12页
  • 作者

    Yuan Chao; Ding Zhen; Wang T. J.; Dunn Martin L.; Qi H. Jerry;

  • 作者单位

    Xi An Jiao Tong Univ State Key Lab Strength &

    Vibrat Mech Struct Sch Aerosp Engn Xian 710049 Shaanxi Peoples R China;

    Singapore Univ Technol &

    Design SUTD Digital Mfg &

    Design DManD Ctr Singapore 487372 Singapore;

    Xi An Jiao Tong Univ State Key Lab Strength &

    Vibrat Mech Struct Sch Aerosp Engn Xian 710049 Shaanxi Peoples R China;

    Singapore Univ Technol &

    Design SUTD Digital Mfg &

    Design DManD Ctr Singapore 487372 Singapore;

    Georgia Inst Technol GWW Sch Mech Engn Atlanta GA 30332 USA;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 智能材料;
  • 关键词

    4D printing; active composites; shape memory polymers; active structures;

    机译：4D打印;有源复合材料;形状记忆聚合物;有源结构;

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