Inverse Characteristics of Magnetically Controlled Shape Memory Alloy under External Force

Magnetically controlled shape memory alloy (MSMA) is a class of smart material that changes shape when it is exposed to a moderate magnetic field, which provides a new way to produce motion and force. The MSMA material has also another property: the MSMA material can change its magnetic property when it is subjected to external force, which is known as inverse characteristics of MSMA. In this paper, a testing device which is used to testing inverse characteristics of MSM material is presented, the larger variation of magnetic flux density is caused when the MSMA material is mechanically compressed with static force, the larger induced voltage is output under impact force, the change laws of induced voltage peak-peak are studied under different input conditions of exciting force. The experimental results lay a foundation for sensor application.