The packaging proposed in this work is made of PDMS with a microarray adhesive structure on one of the surfaces. In addition, a polyamide (PI) capillary is placed in the middle of the packaging, where the FBG sensor is inserte. The packaging proposed in this work is made of PDMS with a microarray adhesive structure on one of the surfaces. In addition, a polyamide (PI) capillary is placed in the middle of the packaging, where the FBG sensor is inserted to remain loose inside. This microarray structure allows one face of the PDMS packaging to strongly attach to the object o. FBGs are optical structures made by periodical changes of the refractive index of the optical fibre core1,2. The axial period of the grating defines a resonance wavelength, known as Bragg wavelength, for which incoming light is reflected in phase, while all other wavelengths are transmitted through. The Bragg wavelength ({uplambda }_{B}=2{n}_{eff. To reduce the strain that is transferred from the monitored structure to the FBG sensor, a PDMS packaging is proposed here with an embedded PI capillary, where the optical fibre containing an FBG sensor is inserted. To better analyse the strain reduction process, simulations through a three-dimensional finite element method (3D-FEM) are first prese. Over the last decade gecko-inspired dry adhesives have been getting a great deal of attention. They are essentially based on mimicking the nano- and micro-structures existing in gecko's feet, which can dynamically attach to different materials using van der Waals force12,13,14,15,16. This type of force results in an attraction between molecules, ge.
