Results 241 to 250 of about 376,698 (300)
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Fracturing Molars with Axial Forces
Journal of Dental Research, 1981Extracted human molars were prepared with different sized occlusal cavities and restored with a high-copper amalgam. Loads were applied along the long axis of the teeth, and forces required to fracture the teeth were recorded. More force was required to break samples with the larger restorations than was required to break samples with the smaller ...
G J, Re, B K, Norling
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Force Necessary to Fracture the Orbital Floor
Ophthalmic Plastic & Reconstructive Surgery, 1990Current thought on the pathophysiology of orbital wall fractures postulates either a "hydraulic" or a "buckling" mechanism. Evidence from cadaver, dried skull, and theoretical model studies supports both theories. No in vivo data, human or nonhuman primate, are available that quantitate the force necessary to fracture the orbital floor by either of the
R P, Green +4 more
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Forces Charging the Orbital Floor After Fractures
Journal of Craniofacial Surgery, 2011The objective of this study was first to establish a method to measure forces and displacement of the orbital content in defects of the orbital floor in truncated fresh and unfixed heads and second to characterize reconstruction materials with regard to punctuation strength and compression.Orbital floor defects (10 × 20 mm and 15 × 20 mm; 3 mm behind ...
Falk, Birkenfeld +7 more
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Fracture Analysis of Ice Forces
Journal of Cold Regions Engineering, 1991The magnitude of the force acting on a structure during an ice‐structure interaction is obtained using an approach based on linear elastic fracture mechanics. The magnitude of the ice‐structure interaction force makes the ice fail in one of many possible failure modes of ice. Crack propagation, which is one of the most significant failure modes of ice,
A. S. Ayoub, T. G. Brown
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Pressure Forces in a Fractured Matrix
2001 Sacramento, CA July 29-August 1,2001, 2001Substantial pressure forces can be transmitted to an overfall boundary as water flows over a headcut. These pressure forces, acting with the hydraulic shear stress, cause soil erosion, scour, and headcut instability. Fracture patterns or cracks can naturally occur in earth materials (soil and rock), and these cracks can accelerate soil erosion ...
null Kerry M. Robinson +1 more
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Material forces in micromorphic fracture mechanics
Journal of the Chinese Institute of Engineers, 2004The physical foundation, the balance laws and the constitutive relations of microcontinuum field theories are briefly reviewed. The concept of material forces, which may also be referred as Eshelbian mechanics, is extended to micromorphic theory. The balance law of pseudo-momentum is formulated. The detailed expressions of Eshelby stress tensor, pseudo-
James D. Lee +2 more
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