International:Evaluating the Magneto-Mechanical Response of Ferromagnetic Composites

0338407 Carman在过去的10年里，大量的研究致力于一种有前途的新型“活性”材料，称为铁磁形状记忆合金（FSMA），在施加磁场的影响下产生非常大的应变。 应变通过孪晶边界运动的机制来检验，而不是在传统的磁致伸缩材料如Terfenol-D中看到的畴生长。 已经观察到与市售形状记忆合金（SMA）（例如NiTi）相当的应变水平。 然而，FSMA材料作为致动器具有更大的前景，因为它们的磁致应变允许比传统SMA的缓慢致动（10 Hz）更高的工作频率。 研究将集中在FSMA材料对传感需求的应用，如高功率声纳，降噪和抗振支架和结构。 此外，格雷格教授卡曼将访问东亚研究人员，以产生美国和东亚之间的合作努力。

0338407CarmanIn the past 10 years a significant amount of research has been dedicated to a promising new 'active' material called Ferromagnetic Shape Memory Alloys (FSMA's) that generates very large strain under the influence of an applied magnetic field. The strain is probated through a mechanism of twin boundary motion as opposed to domain growth as seen in traditional magnetostrictive materials such as Terfenol-D. Strain levels comparable to commercially available Shape Memory Alloys (SMA's) such as NiTi have been observed. However, FSMA materials hold greater promise as actuators since their magnetically induced strain allows for higher operating frequencies than the slow actuation (10 Hz) of traditional SMA's. Research will focus on applications of FSMA material towards transduction needs such as high power sonar, noise reduction, and anti-vibration mounts and structures. In addition Professor Greg Carman will visit with East Asian researchers to generate collaborative efforts between the United States and East Asia.