Relationship of Product function with Dimensional tolerance Student : Irfan Anjum Manarvi Supervisor: Prof. Neal Juster

Presentation sequence Nature and scope of research Experimental Finite Element Simulations Analysis of results Primary conclusions Future direction

Nature and scope of research Experimental Theoretical based on FE simulations

Selection of application ABS plastics deformation under tolerance Design & Manufacture of test rig for application Validity of test rig design Conduct of experiments Test Rig and Coordinate measuring machine Data collection Analysis of results Experimental

Fig 1.0 Specimen thickness 0.9mm, tolerance pin diameter 1.0mm Experimental results

Fig 2.0 Comparison of deformation at specific tolerance for 0.9mm thickness specimen with 1.0mm dia pin

FE Simulation Model design Boundary conditions Mesh formation Product deformation Deformation measurement at specific path

Model Design and Boundary Conditions Boundary conditions

Mesh generation for analysis Element size 2mm No. of elements over 5500

Deformation results

Deformation results by FE simulations

Analysis of Experimental and FE results at 0.2mm, 0.4mm and 0.8mm tolerance

Primary conclusions Product function has definite relationship with dimensional tolerances. Research is limited due to requirements of extra ordinary resources for experimentation and data analysis FE simulation can be used successfully for simulation of relationship between product function and dimensional tolerances.

Improve upon existing FE model To carry out more FE simulations and analyse results on the bases of experimental data Establish sources of errors and minimise differences. Move from simple to complex applications Evolve strategy for using FE simulations to establish relationship between product function and dimensional tolerances Future direction of research