By analyzing underwater flexible object motion, new challenges facing mechanical and engineering industry can be seen. One of typical examples is the need to solve the complex task of elastomeric (e.g. rubber or silicone) robotic objects interaction with the water boundary. Current work is an attempt to launch an investigation on elastomer dynamics of experimental and theoretical research in two directions. Experimental studies have been conducted with a sample loading on the tensile and compression machine. Theoretical research investigation proposes a new model with internal interactions inside elastomers. Model is based on common lateral and diagonal interaction links between cross-sections of a material. Results of the work are applied for vibration systems motion modeling. Additionally, a new dynamical material model may be applied for the imitation of muscle dynamics and thus to provide basis for further applications in biomechanics such as development of artificial muscles.