Modeling of double-layer jacquard fabrics for pattern simulation

Author:

Cong Honglian,Li Xinxin,Zhang Aijun,Zhang Yanting,Zhong Jun

Abstract

Purpose Double-jacquard technique is referred as the most advanced technology for forming patterns on both layers of a 3D fabric knitted on a double-needle bar warp-knitting machine. In order to realize the computer-aided design and simulation of jacquard patterns, the purpose of this paper is to propose a mathematic model for representation of jacquard structures and an improved mass-spring model to improve the simulation of structural deformation behavior. Design/methodology/approach Primarily, it analyzes the jacquard patterning method and displacing principle to design jacquard structures on each layer and linking structures of two layers. Based on that, a loop geometry defined by six key points and segmental lines is built to transfer the jacquard bitmap and lapping movements into a fabric of loops and therefore realizing patterns visualization. Afterwards, an improved mass-spring model is built to simulate structural deformation, in which the fabric is simplified as a mesh of uniformly distributed mass particles. Each loop is treated as a massless particle while underlaps are referred as structural springs connecting loops particles. Elastic forces of these springs on each loop particle is calculated according to the Hook’s law and Newton’s second law, and then based on the explicit Euler’s equations, motion state of each particle is solved including the velocity and the shift. Findings Based on the above method, a simulator for double-layer jacquard fabrics is developed via Visual C++ language to visualize the patterned fabrics with pitting effects. With a jacquard shoe fabric as an example, this simulation model is proved to be practical and efficient by comparing the simulation result and real fabric. Research limitations/implications Because of limited researches, 3D simulation modeling of this double-layer jacquard fabric will be studied in the further research. Practical implications The implement of this simulation method will offer the industries a time-saving and cost-saving approach for new fabrics development. Originality/value This approach can be used as a reference for simulating other knitted fabrics with jacquard patterns, such as jacquard garment fabrics and home textile fabrics.

Publisher

Emerald

Subject

Polymers and Plastics,General Business, Management and Accounting,Materials Science (miscellaneous),Business, Management and Accounting (miscellaneous)

Reference16 articles.

1. Computer simulation for jacquard warp knitted fabric;Journal of Textile Research,2009

2. Design and simulation of ground net-free multibar Raschel lace;Journal of Textile Research,2013

3. Simulation of warp-knitted jacquard fabric with mass-spring model;Journal of Wuhan Textile University,2011

4. 3D parametric human modeling for warp-knitted seamless garment;International Journal of Clothing Science & Technology,2015

5. Three-dimensional computer modeling of warp knitted structures;Textile Research Journal,2002

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