Numerická simulace s využitím elastoplastického materiálového modelu s poškozením a její experimentální ověření

Příspěvek je zaměřen na ověření autory navrženého elastoplastického materiálového modelu s poškozením určeného primárně pro tkaninové kompozity. Vedle popisu principu materiálového modelu a způsobu provedení identifikace potřebných materiálových parametrů je v příspěvku prezentováno srovnání numerických simulací s experimentálními daty získanými z testování geometricky složitějších vzorků, u kterých během zatěžování vznikala složitější kombinace poškození a plastické deformace.SGS 2022 – 00

Material Model for Simulation of Progressive Damage of Composite Materials Using 3D Puck Failure Criterion

This paper deals with the suggestion and the implementation of a material model into the commercial software Abaqus. The material model is capable to simulate a progressive damage of composite materials. The progressive damage simulation is based on a stiffness matrix degradation and the 3D Puck failure criterion. Statistics of the input material parameters is simulated. The pre- dictive capability of the material model was tested by the comparison of the numerical simulations to the tensile test of a laminate

Numerical Simulation of the Low-velocity Impact on the Woven Composite Plate by Usage of Hyperplastic Material Model with Damage

The work is aimed to the numerical modeling of low-velocity impact and validation of the hyperplastic material model with damage designed by authors for modeling of woven composites and implemented into commercial FEM software Abaqus. The woven composite plates were subjected to the low- velocity impact by usage of the drop-test machine with two types of impactor differed by the weight. The experimental data of the tested composite plate in form of deflections at three selected measurement points and the contact force – time dependencies were compared for particular impact velocities with the numerical simulations. The visual comparison of the occurrence of damage on the composite plates was performed and compared with corresponding damage results obtained from the computational model

Numerical Simulation of the Low-velocity Impact on the Woven Composite Plate by Usage of Hyperplastic Material Model with Damage

The work is aimed to the numerical modeling of low-velocity impact and validation of the hyperplastic material model with damage designed by authors for modeling of woven composites and implemented into commercial FEM software Abaqus. The woven composite plates were subjected to the low- velocity impact by usage of the drop-test machine with two types of impactor differed by the weight. The experimental data of the tested composite plate in form of deflections at three selected measurement points and the contact force – time dependencies were compared for particular impact velocities with the numerical simulations. The visual comparison of the occurrence of damage on the composite plates was performed and compared with corresponding damage results obtained from the computational model

Numerická simulace s využitím elastoplastického materiálového modelu s poškozením a její experimentální ověření

Příspěvek je zaměřen na ověření autory navrženého elastoplastického materiálového modelu s poškozením určeného primárně pro tkaninové kompozity. Vedle popisu principu materiálového modelu a způsobu provedení identifikace potřebných materiálových parametrů je v příspěvku prezentováno srovnání numerických simulací s experimentálními daty získanými z testování geometricky složitějších vzorků, u kterých během zatěžování vznikala složitější kombinace poškození a plastické deformace.SGS 2022 – 00

The Non-Linear Sandwich Structure Model for Low-Velocity Impact

This article is focused on progressive failure analysis of sandwich composite structure subjected to transverse low-velocity impact loading. A user defined material model considering non-linear behaviour of the composite skin of the sandwich structure was implemented into commercial software Abaqus by means of material souroutine VUMAT. The experimental measurements of transverse low-velocity impact were performed using an in-house drop tested machine. The results of numerical simulations and experimental data for the sandwich plate deflections at three selected points and the contact force-time dependency during the impact event were compared for particular impact velocities. The occurrence of material damage was visually inspected and compared too

Tensile and bending test of carbon/epoxy and carbon/geopolymer composites after temperature conditioning

Composites with epoxy matrix cannot be used in high temperature, while geopolymer matrix excel in high temperature resistance. First, prismatic specimens were subjected to conditioning temperature. Second, the tensile and bending test were performed at room temperature. This paper present comparison of mechanical properties of carbon/epoxy and carbon/geopolymer composites. Numerical simulations of tensile and bendidng tests were performed in finite element system Abaqus