1,721,100 research outputs found
Surface crack subject to mixed mode loading: numerical simulations and experimental tests
No full textMSD Crack propagation on a repaired aeronautic panel by DBEM, Advances in Engineering Software
No full textThis paper focuses on the use of the Dual Boundary Element Method (DBEM), as implemented in a commercial code (BEASY), to investigate the damage tolerance performance of a riveted repair flat aeronautic panel, realised and tested in the context of the European project ''IARCAS'' (VI framework). Such panel is assembled in such a way to simulate the in service repairs, with doublers riveted over corresponding cut-out. The panels, repair patches and rivets are modelled in a two-dimensional analysis with no allowance for out-of-plane bending, with edge-cracks initiated from some skin rivet holes and growing due to fatigue load. In the model, the layers representative of each component are overlapped but distinct, providing no allowance for the existing offset. The two-dimensional approximation for this problem is not detrimental to the accuracy of numerical-experimental correlation, so it turn out to be useful to study varying repair configurations, where reduced run times and a lean pre-processing phase are prerequisites
A two-parameter model for crack growth simulation under variable load spectrum by combined FEM-DBEM approach
No full textElastic multi body simulation of a multi-cylinder engine
No full textThis paper analyzes the vibration behavior of an in-line 4-cylinder, 4-strokes, internal combustion turbocharged
direct injection gasoline engine. A detailed multi-body numerical model of the engine prototype was used to characterize
the whole engine dynamic behavior, in terms of forces and velocities. The crank train multi-body model was created
starting from engine geometrical data, and the available combustion loads were employed for the Multi-Body Dynamic
Simulation (MBDS). A combined usage of FEM and multi body methodologies were adopted for the dynamic analysis:
both crankshaft and cylinder block were considered as flexible bodies, whereas all the other components were considered
as rigid. The engine mounts were considered as flexible elements with given stiffness and damping. The hydrodynamic
bearings were also modelling. The software LMS Virtual Lab (modules PDS and Motion) and ANSYS were used for the
simulation
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