Sutural composites have been widely adopted as structural components in various engineering applications. In this work, a series of sutural sandwich beam were prepared by integrating the magneto-rheological shear stiffening gel (SSG) and 3D-printed face sheet material. The structural stiffness of beam samples with different sutural interface was tested. It could be found that the sutural interface geometry showed significant influence on the structural stiffness. Due to the specific viscoelastic property of SSG material, the damping ratio of the beam could be improved with the sutural interface. Meanwhile, benefitted from the rate-dependent stiffening and magneto-rheological properties of the SSG core, the sandwich beams exhibited passive and active vibrations suppression capacities. A theory model about the transmission of the beam with SSG core under external vibration excitation was carried out to explain the experimental results. This work proved that the sutural interface could be adopted as a promising strategy to improve the structural stiffness and vibration control capability of the sandwich beam, which was every important in the application of many industry fields.
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