20 research outputs found
From Lie group transformation to the generalized Koiter initial postbuckling theory of perfect shells
Aerospace Engineerin
Derivation of the governing equations of anisotropic conical shells
Aerospace Engineerin
On the seminar of partial differential equations and group theory
Aerospace Engineerin
Imperfection sensitivity of the Brazier effect for orthotropic cylindrical shells
Aerospace Engineerin
Laminated conical shells- Considerations for the variations of the stiffness coefficients
Aerospace Engineerin
On the orthotropicity assumption and discontinuity conditions of conical shells
Aerospace Engineerin
Reliability and Lifetime Prediction of Remote Phosphor Plates in Solid-State Lighting Applications Using Accelerated Degradation Testing
A methodology, based on accelerated degradation testing, is developed to predict the lifetime of remote phosphor plates used in solid-state lighting (SSL) applications. Both thermal stress and light intensity are used to accelerate degradation reaction in remote phosphor plates. A reliability model, based on the Eyring relationship, is also developed in which both acceleration factors (light intensity and temperature) are incorporated. Results show that the developed methodology leads to a significant decay of the luminous flux, correlated colour temperature (CCT) and chromatic properties of phosphor plates within a practically reasonable period of time. The combination of developed acceleration testing and a generalized Eyring equation-based reliability model is a very promising methodology which can be applied in the SSL industry.MicroelectronicsElectrical Engineering, Mathematics and Computer Scienc
Numerical simulation on the mechanical characteristics of double-stranded DNA under axial stretching and lateral unzipping
The mechanical characteristics of the long-chain double-stranded DNA (dsDNA) molecule under the axial stretching and lateral unzipping are studied by the clustered atomistic-continuum method (CACM). The CACM consisted of the clustered atom method (CAM) and the atomistic-continuum method (ACM). The CAM treats the specific atomic group as the superatom, and the ACM describes the chemical binding energies between (super)atoms by virtual elements. The Newtonian based model of the dsDNA includes the superatoms of the backbones?base pairs and the virtual elements of the stacking energies?hydrogen bonds. The effective properties of the superatoms are numerically extracted from the single-stranded DNA experiments. Good agreements were achieved between the dsDNA numerical results and the single molecular experimental results. Via the simulation of stretching dsDNA, the mechanical responses, including the twisting of the backbone and variation of the elastic deformation energy and stacking energy, can be elucidated. Moreover, the predictive capability of the dsDNA CACM model is then examined. Furthermore, the dsDNA model with sequential information is subjected to the unzipping loading, and the in silico results reveal that the sliding of the backbones and the sequential dependent mechanical responses.Microelectronics & Computer EngineeringElectrical Engineering, Mathematics and Computer Scienc