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تعداد نتایج: 186 فیلتر نتایج به سال:
Solid freeform fabrication (SFF), also termed as layered manufacturing, produces parts directly from a computer model without part-specific tooling and human intervention (Sachlos et al., 2003; Leong et al., 2003; Kim et al., 2009; Dwivedi and Kovacevic, 2004; Cai et al., 2003; Tian et al., 2002; Guo et al., 2002; Cawley, 1999; Calvert et al., 1998; Alimardani and Toyserkani, 2008; Alemohammad ...
FGM components are generally constructed to sustain elevated temperatures and severe temperature gradients. Low thermal conductivity, low coefficient of thermal expansion and core ductility have enabled the FGM material to withstand higher temperature gradients for a given heat flux. Examples of structures undergo extremely high temperature gradients are plasma facing materials, propulsion syst...
a r t i c l e i n f o Keywords: Concrete (E) Fiber reinforced concrete (FRC) (E) Constitutive relationship (C) Cohesive fracture (C) Fracture energy (C) A simple, effective, and practical constitutive model for cohesive fracture of fiber reinforced concrete is proposed by differentiating the aggregate bridging zone and the fiber bridging zone. The aggregate bridging zone is related to the total...
In this study, nonlinear analysis for thick cylindrical pressure vessels with arbitrary variable thickness made of hyperelastic functionally graded material properties in nearly incompressible state and clamped boundary conditions under non-uniform pressure loading is presented. Thickness and pressure of the shell are considered in axial direction by arbitrary nonlinear profiles. The FG materia...
M ONOLITHIC piezoelectric materials (PZTs) have been widely used as distributed sensors and actuators for developing smart structures with self-monitoring and selfcontrolling capabilities [1–10]. However, their major drawback is low control authority as the magnitude of their electromechanical coefficients is very small. The situation can be improved by using an active constrained layer damping...
to bone are concerned are brittle materials as exempli ed by hydroxyapatite and ‘Bioglass’. Bioactive coatings are This paper reports on an investigationof the potential employed on metal implants to facilitate bonding to bone use of high energy ball milling (HEBM) for the while retaining the good combination of mechanical production of homogeneous mixtures of titanium/ properties associated w...
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