Assessment of a Friction Joint Concept for the Roadwheel Housing Attachment of the Composite Infantry Fighting Vehicle.

摘要

Evaluation of a friction joint concept was undertaken to assess its viability as a critical joining techniques for the Composite Infantry Fighting Vehicle. Through thickness viscoelastic relaxation effects of the thick (0/90/ 45) S2 glass/polyester woven roving CIFV hull material was experimentally investigated under dynamic surface traction fatigue and static loading conditions for a single connector configuration. Joint slip load as a function of bolt preload was also experimentally determined for this specimen configuration. Using this single connector information, a computer code was developed to predict friction joint lifetimes of multiple connector joints subjected to Perryman III terrain test conditions. Joint reaction forces and moments used in this code were obtained for the Composite Infantry Fighting Vehicle from DADS suspension modeling results. Bolt bearing stress state conditions resulting from friction joint slippage were predicted with a 3D nonlinear elastic finite element model. Finite element constitutive equations were developed for the S2 woven roving material from mechanical properties obtained from tension, compression, intralaminar, and interlamina shear tests.