发明申请
- 专利标题: MULTI-LAYER METAL/SHAPE MEMORY POLYMER ROLL-UP WING STRUCTURES FOR FITMENT-CONSTRAINED AIR VEHICLES
- 专利标题(中): 多层金属/形状记忆聚合物旋转翼型结构
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申请号: US12463400申请日: 2009-05-10
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公开(公告)号: US20100282906A1公开(公告)日: 2010-11-11
- 发明人: Terry M. Sanderson , Brian J. Gowler , David R. Sar , Thomas P. McCreery
- 申请人: Terry M. Sanderson , Brian J. Gowler , David R. Sar , Thomas P. McCreery
- 专利权人: Raytheon Company
- 当前专利权人: Raytheon Company
- 主分类号: B64C3/00
- IPC分类号: B64C3/00 ; B64C1/00
摘要:
A laminated wing structure includes at least one layer of metal material and at least one layer of a shape memory polymer (SMP) material. The SMP is heated to a temperature in its glass transition band Tg to roll the wing around the air vehicle into a stored position. The metal layer(s) must be thin enough to remain below its yield point when rolled up. In preparation for launch, the SMP material is thermally activated allowing the strain energy stored in the layer of metal material to return the wing to its deployed position at launch. Once deployed, the SMP cools to its glassy state. The SMP material may be reinforced with fiber to form a polymer matrix composite (PMC). SMP may be used to provide shear strain relief for multiple metal layers. By offloading the motive force required to return the wing to its original deployed position from the SMP to the metal, the polymer does not acquire a permanent set and the wing may be deployed accurately.
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