I’ve created bracelets in OpenSCAD using a technique where I wrapped a 2D or 3D pattern around a cylinder. The 2D pattern is created with turtle graphics. For those interested I added links to the source code and the video below:
honeycomb bracelet: https://drive.google.com/open?id=1ViF_THQGSOntUqSxaOk_AZ9UI4Bd8WXm
sine wave bracelet: https://drive.google.com/open?id=15Qg4TIjTgIFv3Q27YcNr6wBvUU-OL7MG
video with explanation: https://youtu.be/q8_xyMsUzBg