Publications by authors named "Mingju Lei"
The varied material and the inherent complex microstructure make predicting the effective stiffness of fused deposition modeling (FDM) printed polylactic acid (PLA)/carbon fiber (CF) composite a troublesome problem. This article proposes a microstructure scanning electron microscope (SEM) mapping modeling and numerical mean procedure to calculate the effective stiffness of FDM printing PLA/CF laminates. The printed PLA/CF parts were modeled as a continuum of 3D uniform linear elasticity with orthotropic anisotropy, and their elastic behavior was characterized by orthotropic constitutive relations.
View Article and Find Full Text PDFThe selection of optimal process parameters has a decisive effect on the quality of 3D printing. In this work, the numerical and experimental methods were employed to investigate the FDM printing deposition process of PLA/GNPs nanocomposite. The effect of process parameters on cross-sectional morphology and dimension of the deposited filament, as well as the mechanical property of the FDM printed specimens were studied.
View Article and Find Full Text PDFArticle Synopsis
- Sensors are devices that detect changes in the environment and convert them to electrical signals, with flexible sensors offering advantages in health and biomedicine due to their ability to adapt to their surroundings.
- Hydrogels are ideal materials for flexible sensors because they are both flexible and biocompatible, providing better stretchability compared to traditional elastomer-based sensors.
- The paper reviews self-healing hydrogel flexible sensors, discussing their mechanism, conductivity, advantages and disadvantages, and identifying challenges and future recommendations for improvement.