“…For structurally inhomogeneous materials, the size of the representative volume is determined by experimental or computational methods. 34,35,41 The essence of the computational method is that the dimensions of the representative volume are selected from the paradigm that there is no influence of increasing the number of the carriers of the process mechanisms on the properties being analyzed. Experimental methods use the same paradigm as computational ones, yet the former analyze either the real distribution of the property carriers or the influence of specimen dimensions on material properties of interest.Figure 4.A solid state model (a, b) of the polymer composite monolayer with the misorientation of fiber laying equal to 1° : the size of the representative volume of the composite is 100×100×100 µm.…”
Section: A Technique For Constructing a Multilevel Fiberglass Modelmentioning
confidence: 99%
“…It is easy to determine the representative volume size at the macro level by tension or compression tests; at the micro level, this procedure can be performed by the instrumental indentation technique, which was demonstrated on metal matrix composites. 34,35 The aim of this study is to build, on the basis of micromechanical tests, a multilevel computational model of multilayer fiberglass, which would allow us to determine the properties of the composite at the macroscale level and to evaluate the stressstrain state in the layers of the composite at the macro-and microscale levels under external mechanical action.…”
Section: Introductionmentioning
confidence: 99%
“…It is easy to determine the representative volume size at the macro level by tension or compression tests; at the micro level, this procedure can be performed by the instrumental indentation technique, which was demonstrated on metal matrix composites. 34,35…”
This paper deals with solving the problem of constructing two-level computational models relating the stress-strain state at the microscale to the stress-strain state of the structural component at the macroscale for layered polymer composite materials with unidirectional fiber stacking in a monolayer. The paper presents a two-level computational mechanical model of a ten-layer cross-ply fiberglass-reinforced polymer composite with (0/90) laying patterns. The model is based on microindentation data. The model is constructed using the finite element method. The constructed model has allowed us to predict the elastic properties of the composite and to calculate stresses at the microscale and macroscale levels of a specimen prior to fracture under tensile conditions. The elastic properties of the polymer composite material predicted by the computational model are compared with the properties obtained from real experiments. Calculated for fiberglass, the elasticity modulus and Poisson’s ratio are 31 GPa and 0.11, respectively. Similar elastic properties obtained from real experiments are 28 GPa and 0.10. The technique used in the paper can be applied to computational experiments with an actual structural component made of a multilayer polymer composite in order to determine the stress-strain state at the micro- and macroscale under external mechanical impact on the structure.
“…For structurally inhomogeneous materials, the size of the representative volume is determined by experimental or computational methods. 34,35,41 The essence of the computational method is that the dimensions of the representative volume are selected from the paradigm that there is no influence of increasing the number of the carriers of the process mechanisms on the properties being analyzed. Experimental methods use the same paradigm as computational ones, yet the former analyze either the real distribution of the property carriers or the influence of specimen dimensions on material properties of interest.Figure 4.A solid state model (a, b) of the polymer composite monolayer with the misorientation of fiber laying equal to 1° : the size of the representative volume of the composite is 100×100×100 µm.…”
Section: A Technique For Constructing a Multilevel Fiberglass Modelmentioning
confidence: 99%
“…It is easy to determine the representative volume size at the macro level by tension or compression tests; at the micro level, this procedure can be performed by the instrumental indentation technique, which was demonstrated on metal matrix composites. 34,35 The aim of this study is to build, on the basis of micromechanical tests, a multilevel computational model of multilayer fiberglass, which would allow us to determine the properties of the composite at the macroscale level and to evaluate the stressstrain state in the layers of the composite at the macro-and microscale levels under external mechanical action.…”
Section: Introductionmentioning
confidence: 99%
“…It is easy to determine the representative volume size at the macro level by tension or compression tests; at the micro level, this procedure can be performed by the instrumental indentation technique, which was demonstrated on metal matrix composites. 34,35…”
This paper deals with solving the problem of constructing two-level computational models relating the stress-strain state at the microscale to the stress-strain state of the structural component at the macroscale for layered polymer composite materials with unidirectional fiber stacking in a monolayer. The paper presents a two-level computational mechanical model of a ten-layer cross-ply fiberglass-reinforced polymer composite with (0/90) laying patterns. The model is based on microindentation data. The model is constructed using the finite element method. The constructed model has allowed us to predict the elastic properties of the composite and to calculate stresses at the microscale and macroscale levels of a specimen prior to fracture under tensile conditions. The elastic properties of the polymer composite material predicted by the computational model are compared with the properties obtained from real experiments. Calculated for fiberglass, the elasticity modulus and Poisson’s ratio are 31 GPa and 0.11, respectively. Similar elastic properties obtained from real experiments are 28 GPa and 0.10. The technique used in the paper can be applied to computational experiments with an actual structural component made of a multilayer polymer composite in order to determine the stress-strain state at the micro- and macroscale under external mechanical impact on the structure.
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