We're looking to do a seat belt demonstration on how much force a person wearing/not wearing a seat belt would experience at different speeds – with how much force they would hit the windshield or go through the windshield? Can you point me to a relevant research article?
Answer: First source is the official website of Citroen crash tests:
http://crash.citroenz.biz/how-tests-r-done.html
The second one is the Advisory Report "Anthropomorphic Dummies for Crash and Escape System Testing", read Table 3-9, p. 24;
http://www.dtic.mil/cgi-bin/GetTRDoc?AD=ADA313660&Location=U2&doc=GetTRDoc.pdf
And the third one is "A Study of Kinematics of Occupants Restrained with Seat Belt Systems in Component Rollover Tests", R.W. McCoy, C.C. Chou, Ford Motor Company, read Table 4, p. 16;
http://lapbeltcinch.net/media/CG-Lock/Special-Materials/Ford-Rollover-Paper.pdf