BigLHArrow S E R V I C E S BigRHArrow

 

ENGINEERING DESIGN SERVICES

  Engineering Design Services Overview SmallArrowRH

 

     ENGINEERING MATERIALS & MANUFACTURING:  

 SmallArrowRH Castings

 SmallArrowRH Extrusions

 SmallArrowRH CNC Parts

 SmallArrowRH Plastics & Injection Moulding

 SmallArrowRH Elastomers

 SmallArrowRH Sheet Metal & Fabrication

 

     ENGINEERING COMPONENTS:

 SmallArrowRH Gears & Springs

 SmallArrowRH Hydraulics & Pneumatics

 SmallArrowRH Jigs & Fixtures

 

     ENGINEERING ANALYSIS:

 SmallArrowRH Tolerance Analysis

 SmallArrowRH Mechanims

 SmallArrowRH Kinematics

 

     ENGINEERING SYSTEMATIC DESIGN:

 SmallArrowRH ElectroMechanical

 SmallArrowRH Machine Design

 SmallArrowRH Precision Engineering

 

 

BigRHArrowBigRHArrowComputer Aided Engineering (CAE)  BigRHArrowFEA Case Study: Results Fatigue & Durability

FEACaseStudyFatigue

SmallLHArrow What do the FEA numbers actually mean? (FEA Fatigue & durability) SmallRHArrow

FEA Fatigue Damage and Tolerance: Or durability. From empirical test data, SN curves (stress to number of cycles to failure) are generated. For LM9 cast aluminium alloy, a tensile stress of 90MPa is generated to undergo 2x10^7 cycles (20 million). This is a reasonable duty cycle for a wheel and it means that 20 million cycles @90MPa maybe performed before the wheel fails. Fatigue damage and tolerance (FDT) and SN curves give us the actual stress numbers we need to design for. If you are finding that parts are breaking prematurely (before the duty cycle is complete), then it could be a part stress problem, a manufacturing defect causing weakness, residual stresses or non-homogeneity of the material. It's not intuitive, hence we'll try and help you with any issues you may have.