Wyniki wyszukiwania - BazTech

1

Breaking the Testing Pyramid with Virtual Testing and Hybrid Simulation

You Shawn, Gao Shawn, Nelson Arlin

Fatigue of Aircraft Structures

|

2019

|

Iss. 11

1--10

EN

Virtual testing and hybrid simulation have become an important trend in airplane design and validation. The traditional Testing Pyramid (or Building Block) approaches that emphasis on uniaxial coupon test and full structure certification test are being challenged. Researchers are trying to use advanced testing and simulation methods to replace the Testing Pyramid approach. Before physical testing, virtual testing can be conducted to simulate the physical test. Virtual model of the full testing system including controller, actuators, and fixtures can be constructed and validated. In this work, an example has been developed and validated to show the potentials of the virtual testing process. Hybrid simulation is an approach of analyzing an analysis model and physical structure integrated system under realistic loading conditions. Hybrid simulation combines the lab testing with numerical analysis to explore the benefits of both methodologies. In this study, a hybrid simulation for a simplified airplane wing was conducted to demonstrate the process. Virtual testing and hybrid simulation are alternative methods of Testing Pyramid approach. Full scale tests are still required for certification but the more that is known about the test article, the greater chances of success in the full-scale certification testing.

2

Parametric Study of Geometry Effect on Response to Applied Loadings of Metallic Honeycomb Structures by Virtual Testing of Mesoscale Models

Pietras D., Sadowski T.

Archives of Metallurgy and Materials

|

2018

|

Vol. 63, iss. 2

953--961

EN

In this paper were conducted virtual tests to assess the impact of geometry changes on the response of metallic hexagonal honeycomb structures to applied loadings. The lateral compressive stress state was taken into consideration. The material properties used to build numerical models were assessed in laboratory tests of aluminium alloy 7075. The modelling at meso-scale level allow to comprehensive study of honeycomb internal structure. The changes of honeycomb geometry elements such as: fillets radius of the cell edges in the vicinity of hexagonal vertexes, wall thickness were considered. The computations were conducted by using finite element method with application of the ABAQUS finite element method environment. Elaborated numerical models allowed to demonstrate sensitivity of honeycomb structures damage process response to geometry element changes. They are a proper tools to perform optimization of the honeycomb structures. They will be also helpful in designing process of modern constructions build up of the considered composite constituents in various branches of industry. Moreover, the obtained results can be used as a guide for engineers. Conducted virtual tests lead to conclusion that simplification of the models of internal honeycomb structure which have become commonplace among both engineers and scientist can lead to inaccurate results.

3

Badania wirtualne modelu podpory zestawu mostowego

Zielińska A.

Szybkobieżne Pojazdy Gąsienicowe

|

2007

|

nr 1 (22)

113--122

PL

W artykule zaprezentowano wykorzystanie metody elementów skończonych (MES) do badania modelu konstrukcji podpory przed jej wykonaniem. Badanie wirtualne modelu pozwala wzbogacić proces projektowania o wiedzę zdobytą już na etapie obliczeń inżynierskich. Metoda MES wykorzystywana do obliczeń inżynierskich umożliwia optymalizację konstrukcji poprzez badanie modelu zaprojektowanej wstępnie konstrukcji. Wykorzystanie tej metody pozwala na optymalizację procesu projektowania w Ośrodku.

EN

This paper presents using Finite Elements Method (FEM) to investigation of support construction before its production. Virtual testing of model allows improve design process by using acquired knowledge on the stage of engineering calculation. FEM method used in engineering calculation enables construction optimization by testing of model of preliminary designed construction. Using this method allows for design process optimization in our Centre.

4

Efficient engine development by virtual testing

Rainer G.

Journal of KONES

|

2006

|

Vol. 13, No. 4

51-60

EN

Reliability, safety and quality are key issues for placing products successfully on the market. To achieve these goals Reliability Engineering has to be employed from the concept phase and throughout the lifetime of a product. During the product development phase it is important for the engineer to better understand the factors that cause components and systems to fail. This precondition should considerably lower the risk of delaying the SOP due to failure of prototypes. It is necessary to intensively use computer simulation tools and application methodologies during the design phase and the prototype development in order to make up front investigations based on accurate digital models under real operation conditions. Targets for such calculations are to •analyze proposed design and evaluate the reliability potential, •ensure that all components, subsystems and systems in a design will behave as the designer anticipates and •prepare procedures for the later test runs on components, subsystems and systems. The prerequisites to successfully develop and employ such efficient and reliable simulation methodologies are development platforms which consist of •various mathematical simulation tools including mathematical optimization capabilities, •testing tools corresponding to the mathematical simulation tools, •data and workflow management based on engineering knowledge. The paper describes the development platform for "NVH and Durability" and the employment to optimize crankshaft design and to evaluate the stresses in the cylinder head - cylinder block compound based on system simulation. Comparisons of simulation and experimental results are shown and an evaluation of the method in terms of maturity and limitations to reduce the risk of failures is outlined.