Comparative Theoretical Study of Quasi-Static and Impact Response of Laminated and Textile Composite Structures

摘要

The report presents the details of the computational algorithm for a novel three-dimensional variational dynamic analysis approach developed in computational algorithm of impact contact problem based on variational mosaic model and numerical examples. The analysis approach is aimed at solving a variety of stress analysis problems of composite structural parts under the effect of impulsive and impact loads. Some specific applications of the developed analysis are shown on the examples of transverse dynamic bending of simply supported laminated plate and 3D contact analysis for a multi-brick structure under longitudinal and transverse longitudinal rigid body impact. Numerical results clearly show dynamic effects in response of simply supported laminated plate at high rate of transverse dynamic bending. As the rate of transverse dynamic bending decreases the response of simply supported laminated plate reduces to the corresponding benchmark static solution tensile response of 3D woven fabrics. This example shows the capability of the developed computer code to solve 3D dynamic problems for a wide range of dynamic loading rate. Numerical results for the 3D impact contact problem illustrate time variations of the target displacements, strains and stresses as well as the time variations of the projectile displacement and velocity and impact contact pressure obtained from solution of the coupled problem for mechanical system 'projectile-target'. Considered numerical examples validate applicability and verify accuracy of the developed computational algorithm and computer code.