Abstract: In the improved model of rigid bodies for plain-weave fabrics (IMRBF), simplified Cardan angular coordinates for describing the posture coordinates of the rigid body are of poor universality. To solve this problem, normal Cardan angular coordinates is adopted, then the universal general coordinates of system are obtained and the corresponding expressions for force elements and the motion equations of system are given. As a result, based on the dynamics of multibody systems theory, a model of rigid bodies with Cardan angular coordinates for plain-weave fabrics (CMRBF) is presented. Through the shearing experiments and simulations to kawabata evaluation system for fabrics (KES), the correctness and validity of the proposed model are tested and verified. This model not only keeps the advantage of the IMRBF, such as the less dimensions of the motion equations of system and the computation efficiency, but has better universality, generalization and modeling flexibility, which is convenient to the real-time dynamic simulation for fabric systems.

Key words: fabric mechanics modeling;woven structure;computational dynamics of multibody systems;Cardan angular coordinates;kawabata evaluation system for fabrics shear;fold