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I'm working on a replacement for a broken shelf in my fridge door. It's about 37.6 cm (14.8") on the longest axis so I need to print it in two pieces (as shown in the screenshot). Does anyhone have a good idea for a connection between the two that will be sturdy enough? The fridge door will support it from below for about half of its depth, the rest hangs free.
Wall thickness is currently at 3mm but I can increase it a bit if needed.
What you want to maximise is overlapping surface area and glue.
How you get there will depend on your CAD skills.
One option is to print a 3rd sleeve that you push both parts into. Another option is to cut a 1.5mm deep slice out of the top face of the left part, and a 1.5mm slice out of the bottom of the right part so they slot together with as much surface area overlapping as possible.
https://youtu.be/FzCm1iTf8PA might be helpful, but all the examples are about quite chunky parts.