Prediction of the Mechanical Behavior of a Minicomposite Based on Grey Verhulst Models

Abstract

The tensile behavior of a C/SiC minicomposite fabricated by chemical vapor infiltration was examined and the associated

Analysis and design of recycled glass bead sandwich panels in bending

“…Comparison of σc,el with the compressive strength of the bead core σc,c of approximately 2.1 N/mm 2 [14] confirms that that the material is indeed weaker in tension. It is noted that the limiting elastic strains found for the bead cores in the present study are approximately equivalent to those found for ceramic matrix minicomposites employed in aeronautical applications [35,36].…”

“…Although it can be seen that there exists a degree of variability between their flexural responses, after a certain amount of deformation (δ = 0.5-0.6 mm), the material undergoes some softening with the flexural rigidity of the specimens reducing up until failure. From a micromechanical perspective, analogies can be drawn from analyses of fibre-ceramic composites in tension [35,36], whereby the constituent materials of the glass-polymer composite initially undergo elastic deformation up to a level of strain whereupon damage at the microscale initiates that manifests itself at the macroscale as an overall loss of stiffness; the damage mechanisms include cracking of the polymer matrix and interfacial debonding from the particles [32,33]. Damage continues to propagate through the specimen with increasing load until failure occurs, with a large diagonal crack such as that shown in Figure 4a visible.…”

Research on the Grey Verhulst Model Based on Particle Swarm Optimization and Markov Chain to Predict the Settlement of High Fill Subgrade in Xiangli Expressway

“…The probability of the corresponding state is determined according to (21), and the predicted value of the residual error can be calculated.…”

“…The grey Verhulst model based on PSO algorithm is adopted to discuss the relationship between CO 2 emissions and economy by Wang and Li [20]. The grey Verhulst model and inverse Verhulst model are established to predict the mechanical behavior of a minicomposite by Wang et al [21]. An optimal grey Verhulst model is proposed to predict the concentration of nitrogen in seawater by Hu et al [22].…”

Modeling Tensile Damage and Fracture Behavior of Fiber-Reinforced Ceramic-Matrix Minicomposites

“…Many in situ monitoring techniques, including acoustic emission (AE), X-ray microtomography, and acousto-ultrasonics (AU), have been used to detect and reveal internal damage evolution mechanisms in minicomposites [ 9 , 10 , 11 , 12 ]. Under tensile load, the damages in the minicomposites can be divided into different stages and the damage stages are affected by the fiber type and interphases [ 13 , 14 , 15 , 16 ]. Heat-treatment at elevated temperature causes damages in the fiber and interphase, leading to the degradation of tensile performance of mini-CMCs [ 17 , 18 , 19 , 20 , 21 ].…”