Steven Wakefield's research while affiliated with Imperial College London and other places

Publication (1)

Article
The mechanical properties of polystyrene-interleaved carbon fibre reinforced epoxy composites, which exhibit controllable stiffness, have been investigated. DMTA and flexural tests showed that the storage modulus and flexural stiffness of these composites could be reduced by up to 98% when heated from 20 °C to 120 °C and the stiffness was fully rec...

Citations

... Ply slip can subsequently be controlled by the dielectric constant of the material (ε r ), its thickness (d), the applied electric potential (V) and coefficient of friction (μ). σ = ε r ε 0 V 2 2d 2 (4) τ = μσ (5) Conversely, structural morphing composites utilising active slip typically incorporate thermoplastic (TP) layers as interleaves between composite plies to induce slip when the service temperature exceeds T g of the interleaf during the phase change from stiff to flexible [145,199,[236][237][238][239][240][241][242][243][244][245][246] (Fig. 8). Balsa wood plies interleaved with a hot glue (TP) layer and aluminium plies interleaved with TP polymers embedded with a nichrome wire heating element and electric heating blankets, respectively, are simple examples that can illustrate the potential of structural morphing composites with controllable stiffness [246,247]. ...