Wen S. Chan's research while affiliated with University of Texas at Arlington and other places

Publications (12)

Conference Paper
This research discourse presents the development of a holistic mathematical model that is dedicated to showcase a set of analytical expressions for predicting global stiffness (axial stiffness, bending stiffness) and a material response characterization based on ply-per-ply in-plane stress investigations relevant to open-celled multidirectional cur...
Conference Paper
Simple analytical solutions are developed for efficient computation of equivalent bending stiffness and ply stresses for n-sided regular polygonal cross-sections. The cross-sections investigated includes triangle, square, pentagon and hexagon for 3, 4, 5 and 6 sides, respectively. The analytical solution, based on Classical Lamination Theory, trans...
Article
Increasing use of composite materials in applications of aerospace and civil structures, their safety andreliability under high temperature andfire environments must be assured. This paper covers a study of structural integrity of composite structures that are exposedto fire or intense heat. The parameters that affect their critical buckling loads...
Article
Finite element models are used to analyze a quarter of unit cell for a unidirectional lamina. Effective lamina properties obtained from a micromechanics model were used to compare with the FEM results. Stresses at the fiber/matrix interface are determined for longitudinal and transverse tension load and combined tension and thermal load. Strain ene...
Article
The performance of composite repairing using single lapped joints is sensitive to factors such as ply stacking sequence of laminate, bonding surface preparation, anisotropic nature of adherend, as well as bearing and load transfer from one adherend to the other. This research is focused to investigate the stress distributions in laminated composite...
Article
The composite rod has emerged as a new material form that is currently being considered in the design of stiffener reinforced structures for low-cost composite wing and fuselage structural applications. This paper covers buckling analysis of rodpack laminates with and without defects. Defects considered in this study include rods broken in the cent...
Article
Accurate evaluation of bending stiffness is important for better prediction of deflection, buckling load, and vibration response of structures. This paper presents two new approaches based upon laminated plate and shell theories for calculating the bending stiffness of circular tube made of fiber reinforced composites. Both new approaches account f...
Article
Accurate evaluation of bending stiffness is important for better prediction of deflection, buckling load, and vibration response of structures. This paper presents two new approaches based upon laminated plate and shell theories for calculating the bending stiffness of circular tube made of fiber reinforced composites. Both new approaches account f...
Conference Paper
The analytical solution of stiffness matrix for the Z-Fiber Reinforced Laminate was derived. The developed closed form solution is based upon transferring z-fiber stiffness onto the laminate plane and super imposed with face skin laminate stiffness. Three-dimensional finite element analysis is also conducted to numerically verify the closed-form so...
Article
This paper reviews the material and structural approaches to increase resistance of delamination initiation and growth. In the material approach, it was found that currently available toughened thermosets and thermoplastic composites can significantly improve delamination resistance for static, but not fatigue, loading. In the structural approach,...
Article
Analytical methods such as simple sublaminate analysis, as well as quasi three-dimensional finite element analysis, provide insight into delamination characteristics and reliable trend data with which to make rapid evaluations of competitive concepts in the design environment. It is concluded that free edge delamination can be managed by analysis a...
Article
Two approaches to approximately determine the orthotropic stress concentration factor for symmetric and balanced laminates using only two parameters were investigated. The first approach was to plot the orthotropic stress concentration factor as a function E x /E y and E x /G xy and then use a curve fit procedure to develop an approximate relations...

Citations

... The characterization of flexural and compressive properties of sandwichstructured composites with different thickness, geometry, and material of core has been reported in Refs. [29][30][31][32][33][34][35][36]. Liu et al. [29], investigated the effect of the relative density of composite sandwich structure with Y-shaped cores on the compressive behavior. ...
... For the purpose of demonstrating numerically the aforementioned concepts, the material selected for generating the necessary simulated experimental data is a typical laminate constructed from an epoxy resin/fiber laminae system of type AS4/3506-1. The elastic moduli of this material are listed in Table 2 according to several sources [3,54,[57][58][59][60][61][62]. ...
... During the past few years, experimental studies have been frequently carried out to investigate the fire behaviors of laminated combustible panels, much focusing on timber. For example, influences of adhesive on the fire behaviors of timber materials have been addressed [28,29], together with other fire behaviors such as ignition properties [30,31], charring depth [32,33], charring rate [34,35], heat release rate [36], gas volatiles [37], temperature distribution within the materials [38] and structural stability exposed to high temperature or fire [39,40]. For example, Frangi et al. [28,29,41] indicated that the fire behaviors of laminated panels are strongly dependent on several aspects, such as the behaviors of a single layer, adhesive, thickness and number of layers. ...
... Over the last two decades, rule based knowledge-based techniques have emerged as powerful decision support tools for simplifying modeling polymer matrix composites. The use of expert systems in the fields of polymer matrix or polymeric-based composites material selection has been reported in the literature [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15]. Computer packages on the material selection of polymer materials that are currently gaining popularity include Plascams [3] and PERITUS [4]. ...
... Chan and Demirhan [3] have carried out investigative work to predict the deflection, buckling load, and vibration response of laminated composite tube. Laminated tube and shell theories were used to calculate the bending stiffness of laminated composite tubes. ...
... However, their application to lattice design is not common and should be considered when analyzing and optimizing hollow-walled lattices, in a similar way critical buckling theory is implemented for large scale columns [44]. This formula is invaluable as a simple predictive model, enabling efficient validation to experimental and numerical results [45,46]. Similarly, the slenderness ratio may be adapted from large scale column research to gauge the mechanical properties of struts [47]. ...
... Several studies have been conducted on the investigation of the mechanical performance of hybrid bolt-adhesive joints. For instance, Chan and Vedhagiri [209] studied the effect of geometrical parameters as well as the adhesive property on the performance of hybrid boltadhesive single lap joints both numerically and experimentally. In the mentioned investigation, CFRP laminates were used as adherends and two bolts had been applied in the overlap region. ...
... Strategies exist to improve out-of-plane properties that involve modifying resin properties or fiber reinforcement architecture. Various strategies involving the fiber architecture include: using throughthickness reinforcement or z pinning via stitches or three-dimensional woven fiber structures [7,[9][10][11], optimizing stacking sequence, or using ply hybridization to reduce interlaminar stresses [12][13][14]. With regard to the matrix, improving fracture toughness has been shown to increase composite delamination resistance. ...