A design of laminated composite plates using graded orthotropic fiber-reinforced composite plies

Static Analysis of Functionally Graded Composite Beams

“…For this, static structural analysis is adopted and maximum deflections for the beam for various uniformly distributed loading conditions are obtained. Then the load deflection curve is plotted for this FG beam and compared with that presented by earlier researchers [14]. This comparison is explained in Fig.…”

“…They also studied the performance and adequacy of the developed models is carried out through a set of illustrative cases focused on the study of static and free vibrations behaviour of plate structures. Recently, Kumar et al [14] proposed a new lamination scheme through the design of a graded orthotropic fiber-reinforced composite ply for achieving continuous variations of material properties along the thickness direction of laminated composite plates. The numerical results reveal the changes of laminate-rigidity and maximum values of stresses while achieving the continuous variations of material properties and stresses across the thickness of laminate by mean of aforesaid conversion/lamination scheme.…”

Strain-deformation Reconstruction of Carbon Fiber Composite Laminates Based on BP Neural Network

“…Assign a random number between (-1,1) to the weight and threshold ,the global error target value ε, the iterations Q and the learning efficiency η were set. A set of input layer vectors X (x1,x2,…,xn) and expected output vectors T (t1,t2,…,tm) were randomly extracted from the N sets of learning samples; weights W ij, Wjk and threshold values aj, bk were initialized and substituted into the activation function respectively so that the hidden layer H (h1,h2,…,hl) and the output layer vector Y (y1,y2,…,ym) were calculated with the expressions as shown in (3) and 4, where l was the number of nodes in the hidden layer and f was the activation function.…”

“…Carbon Fiber Reinforced Polymer (CFRP) has the advantages of high specific strength, good damping performance and flexible designability and the CFRP laminate structure is one of the most common structures of CFRP materials. To meet the bearing and weight reduction requirements on different occasions, CFRP laminates often adopt the variable thickness structure, and the thickness can be changed by interrupting one or several layers in a single-layer sheet inside the structure [1][2][3] . At present, laminate structure is widely used in military, aerospace and wind power generation fields where quality and noise reduction performance are required.…”

Damage Detection in Holed Carbon Fiber Composite Laminates Using Embedded Fiber Bragg Grating Sensors Based on Strain Information

“…And among various CFRP structural elements, CFRP laminated plates are most commonly used. However, some indiscernible and hidden primary damage always appears on the CFRP laminated plates due to defective workmanship, improper transportation, and improper storage and will continuously evolve and expand after being loaded, which greatly weakens the mechanical property of CFRP laminated plates and increases the risk of accidents [5,6]. Besides, the damage of CFRP and that of traditional metal and other materials are distinguished in the mechanism, so some existing damage detection and monitoring methods are unsatisfactory in the usual effect.…”