Dielectric elastomer generator (DEG) converts mechanical energy into electrical energy through the capacitance changes of the elastomer membranes. We conducted experiments and numerical optimization in a pure shear configuration with lateral constraints during cyclic deformation. We pre-stretched acrylic VHB4905 film in the longitudinal direction (λ₂,p = 1.5–4.0) and drove it. At λ₂,p = 3.0, we achieved an energy conversion efficiency of 12.4 %, and the highest specific energy of 26.6 mJ/g at λ₂,p = 1.5. Additionally, we introduced a high-resolution algorithm to map electrical breakdown, tension loss, and electromagnetic instability onto the Φ/H₀–Q/L₀² plane. The constant voltage/constant charge quadrilateral is extended until it touches the safety boundary. The Φ/H₀–Q/L₀² plane is discretized into an 800×800 grid, and the extracted boundary nodes are located within half a grid cell of the analysis curve. After local mesh refinement, the cycle vertices of triangles and quadrilaterals converged within 1 % of the theoretical values, and even when the mesh density was doubled, the area changed by less than 0.5%. In the simulation, the triangular scheme covers 60–85% of the theoretical safe region area, while the quadrilateral scheme covers 30–55 %. Since the algorithm automatically isolates the acceptable boundary, it may be possible to determine the optimal experimental conditions functionally and simply even for new scheme methods, materials, or configuration models.
MURAKAMI et al. (Wed,) studied this question.