in this paper, the mean value of strain energy density criterion has been used to predict the critical fracture load in specimens with u-shaped notch under bending loads. an equation for calculation of averaged strain energy density in this zone has been presented. bending loads under mode i have been considered. two cases have been studied: 1) the control volume only includes the semicircular ...

The aim of this study was to determine the vulnerability of the angle of mandible to fracture in maxillofacial injuries. The etiological factors, distribution of age and gender of the patients with mandibular fracture were investigated. 750 patients were seen for maxillofacial trauma during the period 1991-97 at Khyber College of Dentistry, Peshawar. Out of 750, 546 suffered from mandibular fra...

Introduction. Intertrochanteric fractures are located in the proximal upper part of the femur, extracapsulary and extend up to 5 cm under the minor trochanter (3). Intramedullary fixation is used almost exclusively for this kind of fractures in our department for many years. The most common mechanical complication of intramedullary fixation is the cut out of the sliding screw trough the femoral...

Fracture shaft of humerus is a relatively common long bone fracture accounting for 10 percent of long bone fractures. But unlike other long bone fractures, the uniqueness of this fracture is that most fractures are managed conservatively rather than operatively. Excellent functional outcomes and high rates of bony union have been reported by numerous studies for conservatively managed fractures...

in the present study, an investigation was carried out on parvadeh coal mine in tabas, iran, to survey the effect of fractures on unusual methane gas emission in coal mines. this coal mine was chosen for investigating because of its high methane gas content in the coal body and available data from sensors in desired locations. gas concentration monitoring programs were carried out at the mine s...