Abstract
The article discusses the problem of delamination of layered composite samples according to the mode I (tensile opening mode). It includes the experimental part, which sets the averaged characteristics of delamination of the samples in the relation tensile opening–tensile force as well as the description of mesoscale FEM model of composite, which takes into account its internal structure. The model was used in the simulation of delamination, while the development of the fracture took place in consequence of modifications of finite elements modelling the matrix. The results of the delamination simulation with the use of the developed FEM model were consistent with the results of the experiment.
Highlights
Polymer composite materials with a laminar structure are characterized by: high mechanical strength with low own weight, corrosion resistance and satisfactory thermal stability
Compared to the results of tests carried out within the work [4], a better agreement of the delamination characteristics was obtained, because during preparation of the specimens, attention was paid to the accuracy of preparing and gluing of the steel blocks acting as handles
The paper presents the author's mesoscale FE model of a layered composite reinforced with a plain weave fabric made of carbon fiber tows, designed to simulate the phenomenon of delamination of a composite according to the first mode of fracture
Summary
The article discusses the problem of delamination of layered composite specimens according to the mode I (tensile opening mode). It includes the experimental part, which sets the averaged characteristics of delamination of the specimens in the relation tensile opening–tensile force as well as the description of mesoscale FE model of composite, which takes into account its internal structure. Experimental delamination of composite according to the first mode of fracture The first mode of fracture is used to determine the resistance of a composite to breaking the cohesion between layers due to exceeding the permissible value of normal stress in the matrix. The graph for the MAX point gives value of the force PMAX and opening δMAX along with the confidence intervals for the significance level 0.05 according to the t-Student test
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