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Commercial Vehicle Cab Fatigue Life Study Based on the FEM and Tests

Commercial Vehicle Cab Fatigue Life Study Based on the FEM a...

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2018中国汽车工程学会年会

作者： NIE Wenwu ZHANG Lichang MAO Honghai YANG Dongsheng ZHANG Qinchao Shanghai R＆D Center of Weichai Power CO. LTD.

In this paper,commercial vehicle fatigue lift including static torsion fatigue and random fatigue was carried out using the finite element method and test method.The static cab torsion fatigue analysis based on the finite element model was carried with the MSC.Nastran software.Comparing the finite element fatigue calculation results and testing fatigue results,they are very closed and the finite element fatigue analysis can be verified by the Test We established the process of cab random fatigue lift analysis.The spot-welds built in the Hypermesh software must be converted in the FEMFAT software before the inertia relief static compulation.The static and multi-body dynamic simulation were carried with MSC.Nastran and MSC.Adams software.We took the cab random fatigue simulation with the static analysis result and the B grade,C grade,D grade road load history which was obtained from multi-body computation using the testing ground data as input The combination of finite element simulation and test can be used for predicting the cab durability and analyzing the fatigue damage of the cab.The study indicate that spot weld fatigue damage play an important role of the cab fatigue which need to be estimated accurately.

关键词： commercial vehicle cab fatigue analysis finite elements method testing

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MODELLING OF ALKALI-SILICA REACTION IN CONCRETE,PART 3:STRUCTURAL EFFECTS INDUCED BY ASR

MODELLING OF ALKALI-SILICA REACTION IN CONCRETE,PART 3:STRUC...

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第十二届国际混凝土碱集料反应会议

作者： Stéphane POYET Alain SELLIER Bruno CAPRA Geneviève FORAY Jean-Michel TORRENTI Hélène COGNON Eric BOURDAROT Laboratoire de Mécanique-Université de Marne la Vallée Cité Descartes-5 boulevard Descartes-77454 Marne la Vallée Cedex 2 France Laboratoire Matériaux et Durabilité des Constructions-INSA/UPS Département de Génie Civil-135 avenue de Rangueil 31077 Toulouse cedex 4France Laboratoire de Mécanique-Université de Marne la Vallée Cité Descartes-5 boulevard Descartes-77454 Marne la Vallée Cedex 2 France Laboratoire de Mécanique-Université de Marne la Vallée Cité Descartes-5 boulevard Descartes-77454 Marne la Vallée Cedex 2 France IRSN-BP 17 92262 Fontenay aux Roses CedexFrance Electricité de France/DER-Site des Renardières Route de SensEcuelles-77818 Moret-sur-LoingFrance Direction de l’Equipement Centre d’Ingénierie Hydraulique Savoie-Technolac73373 Le Bourget-du-Lac France

＜正＞ A constitutive viscoelastic damage modelling has been developed in the framework of anisotropic damage theory. This mechanical modelling can be classified in the rotating crack formulation category. It includes orthotropic damage induced by ASR swelling, delayed strains and mechanical loads. Coupling between all sources of orthotropic damage is done by a generalised weakest link approach. Data for the mechanical modelling are macroscopic mechanical characteristics （Young’s modulus, Poisson’s ratio, tensile strength, compressive strength, tensile fracture energy） and parameters defining ASR swelling. This macroscopic coupling damage modelling has been implemented into the finite element code CAST3M. This implementation allows simulating strains, stresses and damages evolutions. A numerical simulation for a simple bending beam loaded by its dead weight and submitted to ASR affected by an external moisture gradient has been carried out. Comparison between experimental observations and numerical predictions are discussed.

关键词： Alkali Silica Reaction modelling structural effects finite elements method damage.

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