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The Effects of Weld Geometry and Glass-fiber-orientation on the Mechanical Performance of Joints - Part II: Kinetics of Glass-fiber-orientation and Mechanical Performance

Morris Plains, New Jersey 07950-1960, USA

Christopher Roth

BASF, Mount Olive, New Jersey 07828-1234, USA

The mechanical performance of injection-molded short glass-fiber-reinforced thermoplastic components is anisotropic and is highly dependent on the fiber-orientation and distribution. Similarly, the bulk and short and long-term mechanical performance at the weld is influenced by these fibers and the specific welding technology used as related to melt-pool formation.

The purpose of this analysis is to show:

1. the short-fiber-orientation (analytical and simulation data) and distribution at the prewelded bead, ribs, and wall areas;

2. advantages of SigmaSoft injection-molding simulation software, which utilizes full threedimensional fiber representation of any molded part;

3. the mechanical performance of welds with optimized geometry (US Patent 6,447,866).

Findings on the mechanical performance of butt-joints with different designs and localized geometry will help designers and technicians with plastic part design optimization. In a previous ANTEC paper (Part I) (Kagan, V.A. and Roth, C. (2002). The Effects of Weld Geometry and Glass-Fiber Orientation on the Mechanical Performance of Joints - Part I: Kinetics of Glass-fiber-orientation and Performance at Bulk and Weld Areas, Design Issues, In: ANTEC Proceedings), we related these findings to the kinetics of welds and part design issues for straight and T-type butt-joints.

Key Words: performance • nylon • glass-fiber • linear vibration • welding • optimized • design

Journal of Reinforced Plastics and Composites, Vol. 23, No. 16, 1687-1694 (2004)
DOI: 10.1177/0731684404039785


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