Article
Automation & Control Systems
Haifeng Ning, Hualin Zheng, Xiufen Ma, Xinman Yuan
Summary: This study established a three-dimensional CFRP multi-pass milling finite element model and compared the delamination damage of CFRP when using single-pass and multi-pass milling strategies. The results demonstrate that the multi-pass milling strategy can significantly reduce the delamination damage of CFRP, and the radial cut depth for the second milling should be controlled below 0.6 mm.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2022)
Article
Mechanics
Hui Zhang, Jing Sun, Xiaobo Rui, Si Liu
Summary: This research focuses on developing a method for detecting and imaging delamination damage in CFRP composite laminate structures. The traditional guided wave detection methods rely on the reflected wave signal at the defect, but delamination damage often produces weak reflected wave signals compared to surface damage. The proposed method uses full-wavefield data and enhances sensitive modes in order to visualize the morphology of delamination. The method is validated through simulations and experiments.
COMPOSITE STRUCTURES
(2023)
Article
Mechanics
Raj B. Bharati, M. Filippi, Prashanta K. Mahato, E. Carrera
Summary: The study utilized the Lagrange polynomial in Carrera Unified Formulation (CUF) framework to analyze the flutter of delaminated box-beam, showcasing the capability of this method for complex models.
COMPOSITE STRUCTURES
(2022)
Article
Engineering, Civil
Behzad Kazemianfar, Mohammad Rahim Nami
Summary: The study aimed to compare the mechanical performance of 3D woven composites and 2D composites under oblique low velocity impact. Experimental and simulation results showed that the mechanical superiority of 3D composites decreases as impact angle increases, with changes in factors such as absorbed energy and damage parameters.
THIN-WALLED STRUCTURES
(2021)
Article
Mechanics
Jianxia Wang, Tianliang Qin, Narasimha Rao Mekala, Yujun Li, Mohammad Heidari-Rarani, Kai-Uwe Schroeder
Summary: A three-dimensional progressive damage model for composite bolted joints under tensile loading was developed and validated. The model considered significant damage phenomena and showed high accuracy in predicting inflection load, failure load, load-displacement response, and failure modes. The study revealed that matrix cracking is the dominant failure mode in these joints.
COMPOSITE STRUCTURES
(2022)
Article
Materials Science, Composites
Zhong Luo, Bing Yu, Chengshuang Zhang, Xiaoxia Zhang, Xinyu Sun
Summary: In this paper, the influence of delamination damage on the dynamic properties of thin-walled CFRP tubes is investigated through finite element simulation and experimental methods. It is found that both the delamination size and location have an impact on the natural frequency, and positional information can be discerned in the modal shape for delamination detection and localization.
POLYMER COMPOSITES
(2023)
Article
Mechanics
A. R. Damanpack, M. Bodaghi
Summary: This paper introduces a new sandwich beam element for analyzing structures with a flexible core and partially delaminated regions. The element uses high-order sandwich panel theory to consider core flexibility and nonlinearities of delaminated regions, ensuring continuity conditions for displacements and rotations at the interfaces. Results show good agreement with both sandwich and 2D FE models in predicting large deformation behaviors.
COMPOSITE STRUCTURES
(2021)
Article
Acoustics
Reza Soleimanpour, Ching-Tai Ng
Summary: This study investigates the higher harmonic generation of Lamb waves at delaminations in composite laminates due to contact acoustic nonlinearity. Both numerical and experimental studies were conducted, and a three-dimensional finite element model was proposed and verified using experimental data. The results show that the proposed numerical model can predict higher harmonics generated by contact acoustic nonlinearity, with delamination identified as the main source of this nonlinearity. Additionally, a mode conversion study was carried out to gain further insight into the physical mechanisms behind the higher harmonic generation of Lamb waves at delaminations.
JOURNAL OF VIBRATION AND CONTROL
(2022)
Article
Computer Science, Interdisciplinary Applications
Velibor Isailovic, Nenad Filipovic
Summary: Computer simulations based on numerical methods applied to Newtonian mechanics equilibrium equations are widely used in industries for cost-effective product development. By investigating product behavior under various conditions, simulations help optimize designs and satisfy technical requirements. However, challenges arise in simulating mechanical contact between independent parts, requiring additional boundary conditions to ensure accurate results.
SIMULATION MODELLING PRACTICE AND THEORY
(2021)
Article
Mechanics
Alok Negi, Aakash Soni, Sachin Kumar
Summary: This article presents a gradient-enhanced continuum damage model developed within the finite element method framework to address complex fracture phenomena in anisotropic layered materials. The model is tested on various fiber-reinforced composite laminae and shows consistent results with experimental observations. The model utilizes different damage variables and an improved spatial nonlocal description to accurately model damage anisotropy.
COMPOSITE STRUCTURES
(2022)
Article
Mechanics
Mathilde Zani, Daniele Fanteria, Anita Catapano, Marco Montemurro
Summary: This study presents a consistent energy-based cohesive zone model for simulating the mode I delamination behavior of FUMD laminates and validates the effectiveness of the model through experiments. The numerical simulations closely replicate the delamination behavior of DCB specimens, but with some differences compared to experimental results.
COMPOSITE STRUCTURES
(2022)
Article
Materials Science, Multidisciplinary
Stanislav Zak, Alice Lassnig, Megan J. Cordill, Reinhard Pippan
Summary: In recent years, research on adhesion properties of thin films on brittle substrates has increased, with the continued use of the Hutchinson-Suo method for measuring adhesion. Modern material combinations may lead to plastic deformations rather than elastic behavior. This study uses finite element analysis to investigate the influence of plastic deformation on experimental procedures.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2021)
Article
Materials Science, Multidisciplinary
Phaneendra Kumar Kopparthi, Srikar Gemaraju, Bhaskara Rao Pathakokila, Suresh Gamini
Summary: This study investigates the impact of induced delamination on the flexural performance of CFRP composites, using both finite element models and experimental validation. The results show that delamination significantly reduces the flexural strength and stiffness of the composite materials.
MULTIDISCIPLINE MODELING IN MATERIALS AND STRUCTURES
(2021)
Article
Acoustics
Yuan Feng, Abdul Hamid Sheikh, Ching-Tai Ng, Scott T. Smith
Summary: This paper presents a higher order laminate model with sub-lamination capability for simulating wave propagation within delaminated composite and sandwich beams. Each sub-laminate adopts cubic and quadratic through-thickness variation for axial and transverse displacement, respectively. The model can achieve the desired level of accuracy and computational efficiency by using a suitable sub-lamination scheme, and it also incorporates the effect of contact within delamination regions.
JOURNAL OF SOUND AND VIBRATION
(2023)
Article
Materials Science, Multidisciplinary
Krishnendu Bhowmik, Tanmoy Mukhopadhyay, Mostapha Tarfaoui, Niloy Khutia, Amit Roy Chowdhury, Khalid Lafdi
Summary: The present study utilizes FE analysis to analyze the progressive failure of MWCNT reinforced laminated composites, demonstrating that MWCNT can retard damage propagation and decrease the proportions of fiber, matrix, and shear damages.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)