No. DAB is vertically polarised and FM is horizontally polarised. You could turn your DAB aerial through 90 degrees and it would probably pick up FM, but then you would get DAB!!
Given that you can pick up FM and DAB on telescopic aerials on portable radios, and the free 'wire' aerials supplied with tuners then I'd say there is every chance that you could pick up an FM signal from a horizontal DAB aerial or vice versa, but in either case that signal will be compromised and you might suffer from reduced sound quality or at worst audible inteference or break-up.