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Morphology and fracture of enamel
Journal of Biomechanics, 2009This study examines the inter-relation between enamel morphology and crack resistance by sectioning extracted human molars after loading to fracture. Cracks appear to initiate from tufts, hypocalcified defects at the enamel-dentin junction, and grow longitudinally around the enamel coat to produce failure.
Sangwon, Myoung +5 more
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Morphology of fractured domains in brittle fracture
Metallurgical and Materials Transactions A, 2004We propose a thermodynamic approach, allowing one to determine the shape of the intensively fractured zones (IFZs), simultaneously with the distribution of stress and strain within the IFZ appearing in brittle fracture. The approach combines Gibbs’ variational paradigm of the theory of heterogeneous systems with Griffith’s variational paradigm of the ...
M. A. Grinfeld, T. W. Wright
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Fracture edge features of diaphyseal clavicular fractures: a morphologic study
Journal of Shoulder and Elbow Surgery, 2023Previous researchers used transverse fractures centered over the midpoint of the clavicle as the diaphyseal clavicular fracture models. However, as a result of shear stress concentration in sigmoid-shaped structures, most diaphyseal clavicular fractures have coronal fracture edges and are located distal to the midpoint. The purpose of this study was to
Yi-Hsuan Chao +2 more
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Morphology of direct and indirect rib fractures
International Journal of Legal Medicine, 2020Rib fractures are a common finding in legal medicine and information on the impact mechanism is relevant for trauma reconstruction. This study focuses on morphological characteristics of rib fractures resulting from direct or indirect force. Fresh human ribs (n = 312) were divided into two groups and broken through local force (direct) and bending ...
Kissling S, Hausmann R
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Fracture line morphology of complex proximal humeral fractures
Journal of Shoulder and Elbow Surgery, 2017The aim of this study was to assess proximal humeral fracture patterns using 3-dimensional computed tomography images and relate them to the normal osseous landmarks and soft-tissue attachments.Forty-eight 3-dimensional computed tomography scans of proximal humeral fractures were retrospectively collected, and the fractures were transcribed onto ...
Afsana P. Hasan +3 more
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The fracture toughness and fracture morphology of polyester resins
Journal of Materials Science, 1976The change in fracture toughness of an orthophthalate based medium reactivity polyester resin with change in resin flexibility, catalyst content, cure temperature and liquid environment, has been investigated. Various specimen geometries including simple double cantilever beam and tapered double cantilever beam have been used and the results obtained ...
A. Christiansen, J. B. Shortall
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Study of the fracture toughness and fracture morphology of polybenzimidazole
Journal of Materials Science, 1992Polybenzimidazole (PBI) is a relatively new polymeric material exhibiting unusual properties that are attributable to its aromatic-heterocyclic monomer structure. Owing to its high strength, stiffness and excellent stability in hostile chemical and thermal environments, PBI is being used increasingly in critical applications. As a result, understanding
J. F. Groves +2 more
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The fracture morphology of fast unstable fracture in polycarbonate
Journal of Materials Science, 1991Fracture tests were conducted on polycarbonate using compact tension specimens. With the aid of fractographic analysis techniques the effects of various geometric and test parameters on the fracture-surface morphology were studied. Four distinct regions were identified on the fracture surface: (i) initiation region, (ii) mist region, (iii) mirror ...
C. M. Agrawal, G. W. Pearsall
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