Volume 10,
Issue 5, 2001
Composite
Material Based Laminated Object Manufacturing (LOM) Process Simulation
Joohyuk
Park1, Moon K. Kang2 and H. Thomas. Hahn2
1School
of Mechanical and Aerospace Engineering
Sejong
University, 98 Kunja-dong, Kwangjin-ku, Seoul, Korea 143-747
2Mechanical
and Aerospace Engineering Department
University
of California, Los Angeles
Los
Angeles, CA 90095-1597,USA
(Received
8/01; accepted 10/01)
ABSTRACT
In laminated
object manufacturing process (LOM) as a rapid manufacturing technique,
the key process parameters for achieving a successful prototype are the
roller temperature, the roller speed, the roller indentation and the
laser cutting time. In addition to these basic process parameters, the
material properties and the configuration of the parts affect the
internal stresses, local deformations built during the process and the
bonding quality. A finite element method was adopted to simulate the
thermal aspects of the bonding process along with the structural
deformation of the part. Thermal and stress analysis was carried out to
calculate the interlaminar shear strength between layers. Experiments
were conducted to verify the simulation result for the internal
temperature profiles. The finished prototype was tested mechanically to
measure interlaminar shear strength to estimate the bonding quality. The
calculated bonding quality was compared with the bonding strength
converted from the measured interlaminar shear strength, showing a good
agreement between the two. In compliance with the increasing demand for
high-strength working prototypes, the developed simulation code can
simulate the incorporation of new material for the LOM process.
Keywords:
Laminated object manufacturing, rapid prototyping, degree of bonding
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