巴斯夫_曾乐_利用联合仿真协助开发引擎支架课件

1、巴斯夫（中国）有限公司/CAE 工程师/曾乐利用联合仿真协助开发引擎支架ContentBASF CAE IntroductionUltrasimTM IntroductionIntegrative Simulation of Engine MountConclusion and Future planBASF CAE IntroductionCustomer Support in Asia-PacificHow can we do for you by CAE?Simulation TechnologyAcousticOptimization StructureProcessingCrashU

2、ltrasim IntroductionWhat is Ultrasim? Do the right things right Anisotropic Nonlinear Strain-rate sensitive Tension-compression asymmetric Failure modeling Process simulation Mechanical Simulation Mathematical Optimization Parameter Shape TopologyMaterial modelling - Integrative SimulationCAE Method

3、s + Mathematical OptimizationULTRASIM(R)CalculatethepartrightCalculatetherightpartUltrasim 7 step development UltrasimFilling simulationFiber orientationStress simulationmaterial model UltrasimPerformance evaluation by failure criteriaPart DesignDesign SpaceTopological OptimizationUltrasim How is fi

4、ber orientation distributedA Fiber Orientation Tensor: 0.9Strength 205 MPaABB Fiber Orientation Tensor : 0.33Strength 70 MPaStrain %Stress MPaWith isotropic material property, you will lose lots of important information.Mechanical behavior of anisotropicFiber reinforced Polymer, Stress-Strain0204060

5、8010012002468Strain %TensionTensionStress MPaInjection moulded plateinfluence: fiber orientation and hydrostatic stress stateCompressionCompression910Material Measurements Data FlowSoftwareStress: Strain: GOM - ARAMISDeformation GradientForce(t)How we do with Ultrasim? Data Process FlowABAQUS,LS-Dyn

6、a, PAM-Crash, RADIOSS, NASTRANMOLDEXUltrasimFilling-simulationFinite Element Simulation Material-parameterGeometry, Boundary Cond.homogenization of orientationanisotropic material modelhomogenization of fibers and polymerMaterial-parameterMaterial model for fiberselastic brittleMaterial model for po

7、lymerelastic Elastic-plasticviscoplasticIntegrative Simulation of Engine MountEngine Mount ModelPlastic bracketSteel insertRubber bushingFilling resultProcess SettingMaterialBASF Ultramid A3WG10Melt Temp.290 C Mold Temp.85 CInjection Time2 sV/P Switch Point98%Packing10 s, 80% of max pressureCooling

8、Time50 sFiber orientationHow to get the fiber orientation data?FE ModelLoad pointfixed pointWorking Temperature: 85 CFiber orientation(Moldex 3D) mappingMaterial data(Ultrasim)*.inp file(Abaqus)Simulation result Deformation(mm)With Fiber orientationWithout Fiber orientationSimulation result Failure

9、indexWith Fiber orientationFailure index(*)Without Fiber orientationInterpreting ULTRASIM Failure Index0,61,00,20,61,00,2Fig. 1 Failure value for tensile test bar longitudinal to fiber directionAs thermoplastic materials show a great dependency on strain, stress state (tension or compression), fiber

10、 and strain rate, the failure is also dependent on all those factors. The failure description approach in ULTRASIM is able to handle all those influences simultaneously.ULTRASIM failure index is nonlinear. By comparing stress-strain curves and corresponding failure value (s. Fig. 1/2) it can be seen

11、 that values above 0.6 are close to maximum stress.We recommend a maximum failure index of 0.6 to design a robust part without failure. = (,stress-state,)Fig. 2 Failure value for tensile test bar transverse to fiber directionSuccess storiesPowertrain Mounts/BracketsChassis partsBMW 7er GM Epsilon GM Delta Porsche Panamera Mercedes GL/S/E classMercedes S-ClassHondaConclusion and Future planConclusion and Future planIntegrative simulation is a very important approach for mate