International Journal of Automotive Technology

, Volume 11, Issue 6, pp 849–855 | Cite as

Processing and fiber content effects on the machinability of compression moulded random direction short GFRP composites



The random direction short Glass Fiber Reinforced Plastics (GFRP) have been prepared by two compression moulding processes, namely the Preform and Sheet Moulding Compound (SMC) processes. Cutting force analysis and surface characterization are conducted on the random direction short GFRPs with varying fiber contents (25∼40%). Edge trimming experiments are preformed using carbide inserts with varing the depth of cut and cutting speed. Machining characteristics of the Preform and SMC processed random direction short GFRPs are evaluated in terms of cutting forces, surface quality, and tool wear. It is found that composite primary processing and fiber contents are major contributing factors influencing the cutting force magnitudes and surface textures. The SMC composites show better surface finish over the Preform composites due to less delamination and fiber pullouts. Moreover, matrix damage and fiber protrusions at the machined edge are reduced by increasing fiber content in the random direction short GFRP composites.

Key Words

Random direction short Glass Fiber Reinforced Plastics (GFRPs) Compression moulding Machinability Fiber contents Cutting force analysis Surface texture 


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Copyright information

© The Korean Society of Automotive Engineers and Springer-Verlag Berlin Heidelberg 2010

Authors and Affiliations

  1. 1.School of Engineering and Computer ScienceWashington State UniversityVancouverUSA
  2. 2.Department of Mechanical EngineeringUniversity of TexasAustinUSA
  3. 3.Department of Aeronautical EngineeringIndian Institute of ScienceBangloreIndia
  4. 4.Department of Mechanical EngineeringUniversity of WashingtonSeattleUSA

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