Researchers conducted experiments on thin-walled composite beams made of graphite-epoxy material to study their behavior under static loads. They used a special apparatus to measure bending slope and twist, comparing the results with predictions from simple beam analysis and finite element analysis. They also tested the beams in a vacuum chamber to study their natural vibration characteristics at different speeds. The study found that for composite beams with bending-twisting couplings, section warping and transverse shear significantly affect the structural response, confirming the importance of these factors in the analysis.