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UID:f0e4493d-eae5-4560-a4c4-05458d6e8f7f@nexttoyou
DTSTAMP:20261105T150853Z
DTSTART:20261106T150000Z
DTEND:20261106T160000Z
SUMMARY:Thesis Defense: Kinley Seabaugh
DESCRIPTION:Title: Development of a Material-Informed Equation for Predict
 ing the Normal Coefficient of Restitution in Rockfall Using Vertical Impa
 ct Tests\n\nProgram: Civil Engineering MS\n\nCommittee Chair: Nick Hudyma
 \n\nCommittee: Nick Hudyma\, Bhaskar Chittoori\, Mary MacLaughlin\n\nAbst
 ract: Users of rockfall trajectory modeling software commonly assign coef
 ficients of restitution (COR) based on generalized ground-surface descrip
 tions\, which may not adequately represent differences in the geotechnica
 l properties of natural soils. This research developed a material-informe
 d equation for predicting the normal coefficient of restitution (CORn) us
 ing instrumented controlled drop tests accompanied by field and laborator
 y soil characterization.\nControlled vertical drop tests were conducted a
 t 36 sites in southwest Idaho to capture the variation of the normal coef
 ficient of restitution. The tests were performed using an instrumented co
 ncrete sphere of 21.84 cm diameter\, with a mass of 8.6 kg\, released fro
 m a height of 1.83 m. Three drops were conducted at each site to obtain a
 n average rebound of the concrete sphere impacting the horizontal ground 
 surface. The rebound was measured using high-speed video with particle tr
 acking. The normal coefficient of restitution was calculated using the sq
 uare root of the ratio of measured rebound to initial drop height. An ine
 rtial measurement unit was embedded in the concrete sphere which measured
  the three components of acceleration and rotational velocity. Be\n\nhttp
 ://next-to-u.app/events/f0e4493d-eae5-4560-a4c4-05458d6e8f7f
URL:http://next-to-u.app/events/f0e4493d-eae5-4560-a4c4-05458d6e8f7f
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