A5101444434- Mechanical Behavior of Composites
- Ultrasonics and Acoustic Wave Propagation
- Textile materials and evaluations
- Structural Analysis of Composite Materials
- Epoxy Resin Curing Processes
- Composite Structure Analysis and Optimization
- Structural Behavior of Reinforced Concrete
- Injection Molding Process and Properties
- Optical measurement and interference techniques
- Non-Destructive Testing Techniques
- Infrastructure Maintenance and Monitoring
- Structural Response to Dynamic Loads
- Thermography and Photoacoustic Techniques
- Mathematical and Theoretical Epidemiology and Ecology Models
- Structural Health Monitoring Techniques
- Electronic Packaging and Soldering Technologies
- Smart Materials for Construction
- Material Properties and Processing
- Surface Treatment and Residual Stress
- Geophysical Methods and Applications
- Evolutionary Game Theory and Cooperation
- Evolution and Genetic Dynamics
- Iterative Learning Control Systems
- Manufacturing Process and Optimization
- Fire Detection and Safety Systems
Zhejiang University
2021-2025
Zhejiang University of Technology
2023-2025
University of Science and Technology Liaoning
2020
Collaborative Innovation Center of Advanced Microstructures
1997
Nanjing University
1997
Abstract Curing residual stress (CRS) is common in polymer‐matrix composites due to the anisotropic properties of materials. Finite element method (FEM), most extensively used approach for curing behavior prediction, usually complicated and time‐consuming. To achieve a fast prediction process‐induced stresses, convolutional neural network (CNN) established based on FEM. Firstly, fully coupled methodology built validated through distortions experimentally manufactured laminates. Then, it...
Abstract In the service of composite materials, scenarios involving repeated impacts are frequently encountered. our study, time‐frequency characteristics acoustic emission signals during impact processes were investigated using wavelet packet transform. Principal Component Analysis was utilized to identify frequency bands containing most information. Shannon entropy employed select optimal basis function. The terms DDD3, ADD3, and DAA3 correspond matrix cracking, delamination, fiber...
Cutting of fibers at the intersections could effectively mitigate problems associated with fiber accumulation in thick ribs composite grids. However, effectiveness varies according to different rib cutting angles structure. Therefore, five samples 30°, 45°, 60°, 75°, and 90° were prepared this study. Concurrently, numerical model for tensile compressive behavior was established considering zero-thickness interface elements. The results indicated that as angle decreased, strength gradually...
Abstract This study investigates the effect of Z‐pin twist ( λ ) on in‐plane properties composite laminates and reveals underlying failure mechanisms. A novel numerical procedure for performance is proposed, including tensile compression models twisted reinforced laminates. The fiber bundles are arranged in a regular quadrilateral pattern, simplified as cylindrical shell composed surrounding resin matrix. Zero‐thickness cohesive elements inserted to simulate matrix, splitting, fracture...
Abstract This study, for the first time, presented a novel Bayesian inference deep learning model based on dilated convolutional ResNet framework, utilizing acoustic emission (AE) signals as inputs to quantify uncertainty of compression after impact (CAI) strength in composites. The output included mean CAI and predictive aleatoric uncertainty. epistemic was estimated by randomly sampling input multiple times. AE were divided into complete training dataset partially missing investigate data...
The fiber path planning of double-curvature composite panels is closely related to the forming quality components. Determining optimal for with multiple reference baselines remains be studied. This study proposes a placement benchmark-averaging algorithm generating paths under directions, and then utilizes it design stiffened panel. Post-forming, manufacturing component was evaluated regarding internal flaws, thickness variations, microscopic morphology. Results demonstrated that on...
Carbon fiber-reinforced polymer (CFRP) has become widely applied in engineering fields such as aerospace and the automotive industries. Evaluating damage tolerance of CFRP with manufacturing defects under impact loads is crucial ensuring reliable service components. In this study, four types wrinkle are designed, effect mechanism thoroughly discussed, focusing on compressive response. The results indicate that primarily affect response via fibers being subjected to stress concentration....
In order to provide guidance for Muzhailin tunnel design and construction, in this study, five groups of slate specimens with different bedding angles (β, angle between plane vertical axis) were taken from site conduct Brazilian splitting tests. The tensile strength, applied energy, failure behaviour, acoustic emission (AE) characteristics analyzed, the mechanism was elucidated. results show that average strength specimen β equal 90° is ∼1.38 times 0°. Additionally, energy exhibits nonlinear...
In automated fiber placement (AFP), the contact pressure between roller and mold is an important process parameter. Too small or too large will result in unacceptable laying defects. This paper focuses on control method of AFP. Firstly, dynamic model pressing foot mechanism established, a mathematical relationship input air output force developed. Then, self-tuning PI algorithm used to implement servo based Slowly Time-Varying Recursive Identification Algorithm. Also, using Abaqus/CAE,...
Abstract The axial buckling load of single carbon fiber or composite strands is typically predicted using Euler's formula, developed for isotropic materials. This study introduces anisotropy in a mechanical carbon/epoxy Z‐pin model under pressure. It examines the influence compressive modulus, shear off‐axis angle, and aspect ratio on its behavior. Results show that instability performance decreases with lower compression, while keeping tensile modulus fixed. Anisotropy by up to 14% compared...
Quasi-static indentation (QSI) experiments are conducted to investigate the localization, identification and evolution of induced damage in laminate composite up delamination initiation using acoustic emission (AE) techniques. In this study, we propose a continuous wavelet transform (CWT)-based localization method for composites, which can simultaneously identify two modes, namely matrix cracking delamination. The experimental findings demonstrate that proposed algorithm, utilizes arrival...
Abstract To improve the impact resistance of composite materials, this study introduces an efficient global optimization framework based on a multi‐fidelity surrogate model to optimize layup sequence laminates. Numerical simulation models are constructed utilizing Hashin and Puck failure criteria provide few time‐consuming high‐fidelity samples multitude inexpensive low‐fidelity samples. The traditional genetic algorithm has been improved in terms encoding mechanisms, operators,...