MECHANICAL MODEL OF PMMA IN THERMOFORMING PROCESS SIMULATION

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REZAEI MAJID; HASANPOUR KOUROSH

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Seminar Paper

Paper Information

Seminar: CONFERENCE OF IRANIAN AEROSPACE SOCIETY
Year:2015 | Issue:14

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Title

MECHANICAL MODEL OF PMMA IN THERMOFORMING PROCESS SIMULATION

Author(s)

REZAEI MAJID | HASANPOUR KOUROSH

Keywords

PMMA FORMING

FEM SIMULATION

MECHANICAL BEHAVIORS

AIRPLANE CANOPY

Abstract

THERMOFORMING, AS A COMMON AND SIMPLE METHOD OF FORMING POLYMERIC PARTS, IS A DEFORMATION PROCESS OF A POLYMER IN THE RUBBERY STATE ABOVE ITS GLASS TRANSITION TEMPERATURE. HOWEVER THE CONTACT OF THE SOFTENED POLYMERIC SHEETS WITH THE DIE SURFACE AT DIFFERENT STAGES OF THERMOFORMING CAN AFFECT THE FINAL GEOMETRY OF THE COMPONENT.POLY METAL METHACRYLATE (PMMA) IS A TYPE OF POLYMER WITH MANY INDUSTRIAL APPLICATIONS SUCH AS MANUFACTURING AIRPLANE CANOPY BUBBLE WHICH IS CARRIED OUT AT HIGH TEMPERATURE (130OC). IT IS IDEALLY PROCESSED SLIGHTLY ABOVE ITS GLASS TRANSITION TEMPERATURE AND AT LOW STRAIN RATES TO LIMIT OPTICAL DISTORTIONS. AN ACCURATE MODEL IS NEEDED TO DESCRIBE THE POLYMER BEHAVIOR IN NUMERICAL SIMULATIONS TO RELIABLY PREDICT THE RESULTING SHAPE AND PROVIDE INDUSTRY WITH INEXPENSIVE AND FAST TOOL DESIGN.THE BEHAVIOR OF PMMA IS HIGHLY NONLINEAR AND DEPENDS ON THE TEMPERATURE, SO SIMULATION OF ITS FORMING PROCESS IS A USEFUL SOLUTION TO VERIFY THE EFFECT OF RELEVANT PARAMETERS USING FEM. PROCESS SIMULATION REQUIRES AN APPROPRIATE MECHANICAL BEHAVIOR FOR PMMA. IN THIS PAPER, DIFFERENT MECHANICAL BEHAVIORS OF PMMA ARE USED TO SIMULATE THE CANOPY BUBBLE FORMING PROCESS. FIRST, FOUR SIMULATIONS WITH ELASTIC-PLASTIC MODEL, MOONEY-RIVLIN, OGDEN AND POLYNOMIAL ARE DONE BY ABAQUS/IMPLICIT. THEN, TWO CROSS SECTIONS ARE DEMONSTRATED IN TWO PERPENDICULAR PATH SAMPLES THROUGH FINAL SHAPES. FINALLY SECTION PROFILES ARE COMPARED WITH EXPERIMENTAL PROFILE AND AN APPROPRIATE MECHANICAL BEHAVIOR FOR PMMA IN HIGH TEMPERATURE FORMING PROCESSES IS SUGGESTED.

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APA: Copy

REZAEI, MAJID, & HASANPOUR, KOUROSH. (2015). MECHANICAL MODEL OF PMMA IN THERMOFORMING PROCESS SIMULATION. CONFERENCE OF IRANIAN AEROSPACE SOCIETY. SID. https://sid.ir/paper/945677/en

Vancouver: Copy

REZAEI MAJID, HASANPOUR KOUROSH. MECHANICAL MODEL OF PMMA IN THERMOFORMING PROCESS SIMULATION. 2015. Available from: https://sid.ir/paper/945677/en

IEEE: Copy

MAJID REZAEI, and KOUROSH HASANPOUR, “MECHANICAL MODEL OF PMMA IN THERMOFORMING PROCESS SIMULATION,” presented at the CONFERENCE OF IRANIAN AEROSPACE SOCIETY. 2015, [Online]. Available: https://sid.ir/paper/945677/en

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