A composite biodegradable polymeric model was developed to enhance tendon graft healing. This model included a biodegradable polylactide (PLA) bolt as the bone anchor and a poly(D,L-lactide-co-glycolide) (PLGA) nanofibrous membrane embedded with collagen as a biomimic patch to promote tendon-bone interface integration. Degradation rate and compressive strength of the PLA bolt were measured afte...

Cable termination faults are problematic in electrical networks almost always. Technology has solved problems somewhat, but there are many annual reports about damaged cable terminations. For analyzing the problems, faults in two regional electricity companies are studied. At first step, damaged cable terminations are analyzed statistically and grouped according to their problems. Then, some of...

In this study, nonlinear vibration of a composite cable is investigated by considering nonlinear stress-strain relations. The composite cable is composed of an aluminum wire as reinforcement and a rubber coating as matrix. The nonlinear governing equations of motion are derived about to an initial curve and based on the fundamentals of continuum mechanics and the nonlinear Green-Lagrangian stra...

Rock bursts are a natural phenomenon that caused by high stresses and faults within the deep geological profile. The framework mining excavations, comprising various rock face supports such as cable bolts, is required to withstand bursts. These mechanisms subject static dynamic loading conditions which possess unique challenges. This study focused on shearing impact of loads key structural supp...

Aiming at solving the problem of asymmetric deformation, failure, and stability control surrounding rock caused by excavation deep super large section soft chamber group passing through multilayer strata, taking connected vertical shaft in Wuyang Coal Mine as engineering background, deformation development mode rock, expansion situation loosening range, plastic failure response characteristics ...

To study the deformation and failure mechanisms of soft rock mining roadways, 1506 return airway Anyang Coal Mine is taken as engineering background. Based on limit analysis theory, a model based rigid slider system constructed to assess surrounding roadway. The formulas for calculating self-weight power in velocity discontinuity line roadway, work pressure, energy dissipation rate are derived,...

Accurate analysis of failure mechanisms and scientific support for design coal roadways in water-rich areas plays an important role the long-term stability control roadways. In this study, taking 1044 return laneway Taoyuan Coal Mine China as example, laboratory experiments field tests were performed to study potential roadway. It was found that microcracks inside body increase strength decreas...

In order to alleviate the relationship between mining and roadway, 3204 working face 3206 roadway in Shanxi Taitou coal mine are taken as an example, width of support parameters while reversing excavation under dynamic pressure optimized. The research includes field investigations, theoretical analysis, numerical simulation, tests. Based on characteristics roof fracture distribution pillar stre...

Roadways supported by bolts contain support structures that are built into the rock surrounding the roadway, referred to as reinforced rocks in this paper. Using physical model simulation, the paper investigates the bearing characteristics of the reinforced rock under different bolt parameters with incrementally increased load. The experimental results show that the stress at the measurement po...

workspace analysis is one of the most important issues in the robotic parallel manipulator design. ‎however, ‎the unidirectional constraint imposed by cables causes this analysis more challenging in the cabledriven redundant parallel manipulators. controllable workspace is one of the general workspace in the cabledriven redundant parallel manipulators due to the dependency on geometry parameter...