Advances in Mechanisms and Machine Design: Theory, Analysis, and Applications, Campilho,R.D.S.G., Editör, IIP Series, North Carolina, ss.21-30, 2026
The increasing use of polymer-based components in automotive interiors
has intensified the demand for reliable, lightweight, and cost-efficient
fixation solutions capable of meeting strict mechanical and assembly
requirements imposed by vehicle manufacturers. Polymeric fixation points, such
as clips and snap-fit systems, play an important role in ensuring structural
integrity, perceived quality, and long-term durability of interior trim
components. This chapter presents a comprehensive design and validation
framework for polymeric fixation points applied to automotive interior parts, materialized
by an industrial case study and structured according to the Design Science
Research (DSR) methodology. Two distinct fixation concepts, associated with
different automotive brands and performance specifications, are investigated
through a combined experimental and numerical approach. Mechanical testing
under pull-out and shear loading is complemented by finite element modelling to
identify critical stress regions, deformation mechanisms, and failure modes.
Based on the obtained insights, iterative geometric improvements are proposed
and validated, leading to enhanced mechanical performance and improved
manufacturability. The presented methodology provides a robust and transferable
framework for the systematic development, optimization, and standardization of
polymeric fixation solutions in the automotive industry.
Keywords—Automotive interiors; Polymeric fixation points; Snap-fit design; Finite element analysis; Design Science Research; Experimental validation.