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An ideal solid material will respond to an applied load by deforming ®nitely and recovering that deformation upon removal of the load. Such a response is called ``elastic''. Ideal elastic materials obey Hooke's law, which describes a direct proportionality between the stress ( ) and strain ( ) via a proportionality constant called modulus (G), i.e., ˆ G . An ideal ̄uid will deform and continue t...

The simple shear test may provide unique information regarding the material response of parallel-fibered soft tissues because it allows the elimination of the dominant fiber material response from the overall stresses. However, inhomogeneities in the strain field due to clamping and free edge effects have not been documented. The finite element method was used to study finite simple shear of si...

This paper describes the prototype design, specimen design, experimental set-up, and experimental results of tests on three light-gauge steel plate shear wall (SPSW) concepts. Prototype light-gauge steel plate shear walls are designed as seismic retrofits for a hospital structure in an area of high seismicity and emphasis is placed on minimizing their impact on the existing framing. Three singl...

AIM To determine the shear bond strength of self-etch adhesive G-bond on pre-etched enamel. MATERIALS AND METHODS Thirty caries free human mandibular premolars extracted for orthodontic purpose were used for the study. Occlusal surfaces of all the teeth were flattened with diamond bur and a silicon carbide paper was used for surface smoothening. The thirty samples were randomly grouped into t...

By surveying current research of various micro-electro mechanical systems (MEMS) shear stress sensor development efforts we illustrate the wide variety of methods used to test and characterize these sensors. The different methods of testing these sensors make comparison of results difficult in some cases, and also this comparison is further complicated by the different formats used in reporting...

Background: The old concept of total-etch/dry bonding has been superseded by total-etch/wet bonding, and later on by the self-etch systems. Manufacturers have introduced single bottle systems to be used in total-etch, self-etch, or selective-etch modes under both dry and moist conditions. The aim of this study was to evaluate shear bond strengths of three different dental adhesives under dry an...

introduction: this study was performed to determine the shear bond strength of rebonded mechanically retentive ceramic brackets after recycling with erbium-doped yttrium aluminum garnet (er:yag) laser or sandblasting. methods: twenty-eight debonded ceramic brackets plus 14 intact new ceramic brackets were used in this study. debonded brackets were randomly divided into 2 groups of 14. one group...

background dentin sensitivity is one of the most important problems in dentistry. enamel loss due to root exposure is serious issue and common exposure is one of the reasons for dentin hypersensitivity. there are different methods for solving this problem. one of the most conservative and least expensive methods is use of casein phosphopeptide-amorphous calcium phosphate (cpp-acp) paste. object...

STUDY DESIGN Basic science study using in vitro tissue testing and imaging to characterize local strains in annulus fibrosus (AF) tissue. OBJECTIVE To characterize mesoscale strain inhomogeneities between lamellar and inter-/translamellar (ITL) matrix compartments during tissue shear loading. SUMMARY OF BACKGROUND DATA The intervertebral disc is characterized by significant heterogeneities ...