Accession Number:

ADA550301

Title:

Light Weight Active Structural Materials

Descriptive Note:

Final rept. 17 Jun 2010-17 Jun 2011

Corporate Author:

NANYANG TECHNOLOGICAL UNIV (SINGAPORE)

Personal Author(s):

Report Date:

2011-10-12

Pagination or Media Count:

12.0

Abstract:

Magnet-polymer Magpol composites have very interesting soft transduction properties, including the ability to undergo large strains in response to an external magnetic field. In this project, the mechanical properties of a ferrogel composite system were investigated. The contraction behavior of composites prepared from silicone and micron sized iron particles was studied under the influence of an external magnetic field. By simply changing the boundary conditions, the actuation mode could be changed from axial contraction to a novel coiling mechanism. The actuation strain in the coiling mode is 60, approximately 50 higher than in axial contraction. The actuation stress in coiling mode is 184 kPa, more than 10 higher than in axial contraction. Magnet-polymer composites used in the coiling mode can be useful for soft actuator applications and may be applicable for a wide range of aerospace applications in which smart lightweight active structures are required, e.g., in morphing materials for UAV.

Subject Categories:

  • Laminates and Composite Materials
  • Electricity and Magnetism

Distribution Statement:

APPROVED FOR PUBLIC RELEASE