  Euler springs are used for vertical suspension and vibration isolation as
they provide a large static supporting force with a low spring-rate and use
minimal spring material. To date, multiple single-width rectangular blades of
uniform thickness and stacked flat-face to flat-face have been used in the post
buckled state, with half of the blades buckling in each of opposing directions.
For ultra-low-noise isolation the ends need to be clamped which results in
stick-slip issues at the joints. In this study we investigate the benefits of
forming side-by-side oppositely buckling blades from a single monolithic sheet
of spring material. Additionally, we study how to distribute the stress evenly
along the length of the blade by contouring its width, as well as finding the
optimal contour to distribute the stress evenly around the tearing joints
between oppositely bending blade sections. We show that this optimal shaping
typically improves the inconveniently small spring working range by over 60 %
compared to an equivalent rectangular blade.
