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We study the kinematics and dynamics of a highly compliant membrane diskplaced head-on in a uniform flow. With increasing flow velocity, the membranedeforms nonlinearly into increasingly parachute-like shapes. Theseaerodynamically elongated materials exhibit a modified drag law, which islinked to the elastohydrodynamic interactions. We predict the unsteadystructural response of the membranes using a nonlinear, aeroelastic model -- inexcellent agreement with experimental measurements of deformations and forcefluctuations. With simultaneous membrane interface tracking, force measurementsand flow tracing, we reveal that a peculiar skewness in the membrane'soscillations triggers turbulence production in the wake, thereby modulating thedrag. The present work provides a demonstration of the complex interplaybetween soft materials and fluid turbulence, leading to new, emergent systemproperties.

Shape-Morphing Dynamics of Soft Compliant Membranes for Drag and Turbulence Modulation