A mechanical energy generating apparatus is provided. The apparatus includes a shape changing flexure beam connected at opposing distal ends to first lever arms of a pair of opposing tilt connectors. The apparatus additionally includes a bias beam connected at opposing ends to second lever of the tilt connectors. The tilt connectors are pivotally connected to an adjustable length base such that a distance between the tilt connectors can be adjusted to flex the bias beam and exert a force on the second lever arms of the tilt connectors. The force exerted by the bias beam is transferred to the first lever arms and flexes the flexure beam to approximately a critical buckling stress point of the flexure beam. The flexure beam has a center portion configured to oscillate between a first displacement position beyond the critical buckling stress point, in a first direction, and a second displacement position beyond the buckling stress point, in the an opposing second direction, in response to an oscillating energy field applied across the flexure beam.