Immediate buckling model, hysteresis model, and cloth simulation method based on the invented models, and computer-readable media storing a program which executes the invented simulation method

a simulation method and model technology, applied in the field of immediate buckling model, hysteresis model, cloth simulation method based on the invented model, and computer-readable media storing the program which executes the invented simulation method, can solve the problems of inability to react, indefinite system matrix, extreme ill-conditioned or indefinite system matrix, etc., to achieve accurate expression of the characteristics of movement and fast simulation speed

Inactive Publication Date: 2005-04-14
FXGEAR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

It is an object of the present invention to provide a method for simulating the movement of cloth realistically without the requirement of very fine meshing and short simulation intervals by using a model without the buckling instability.
It is another object of the present inv

Problems solved by technology

Buckling is a deformation which occurs abruptly so that it is a very unstable reaction.
Therefore, the simulation of that kind of buckling results in a divergence problem in differential equations for simulating the movement of cloth.
This structural instability makes the system matrix extremely ill-conditioned or indefinite, and in a case where the time period of the simulation steps is increased, the system matrix becomes divergent.
In conventional simulations of the movement of cloth, a model in which the instability of buckling exists is used such that it is very difficult to simulate a phenomenon of wrinkles (buckling) forming on the surface of the cloth.
The buckling instability problem arises not from the stiff equation itself but from the structural instability of the cloth.
Therefore, simply employing an implicit method cannot solve the problem.
However, although the addition of the damping term can stabilize the system, it obstructs the naturalness of the movement of the cloth.
Hence, a simple addition of a damping term is not des

Method used

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  • Immediate buckling model, hysteresis model, and cloth simulation method based on the invented models, and computer-readable media storing a program which executes the invented simulation method
  • Immediate buckling model, hysteresis model, and cloth simulation method based on the invented models, and computer-readable media storing a program which executes the invented simulation method
  • Immediate buckling model, hysteresis model, and cloth simulation method based on the invented models, and computer-readable media storing a program which executes the invented simulation method

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Embodiment Construction

In order to accomplish the aforementioned objects, the present invention proposes to use the immediate buckling model, the “Choi-Ko Discrete Hysteresis Model” and the “Choi-Ko Continuous Hysteresis Model”. The immediate buckling model comprises deformation units which model cloth, wherein the deformation unit is bent immediately without contraction when compressive force is applied to two extremities of the deformation unit.

The hysteresis phenomenon of cloth is modeled by using finite numbers of spring-slip units in the “Choi-Ko Discrete Hysteresis Model” which is used for simulating the hysteresis characteristics between the curvature and moment. The hysteresis phenomenon of cloth is also modeled by using infinite numbers of spring-slip units in the “Choi-Ko Continuous Hysteresis Model” which is used for simulating the hysteresis phenomenon between curvature and moment more realistically.

The spring model simulates the deformation of cloth when stretching force is applied to bo...

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Abstract

A method of simulating the movement of cloth and a computer-readable medium storing a program which executes the method of simulating the movement of cloth, wherein cloth deformation by compressive force is simulated by an immediate buckling model when the compressive force is applied to two extremities of a deformation unit which models the cloth, cloth deformation by stretching is simulated by a spring model, and hysteresis phenomenon of cloth is simulated by using spring-slips for modeling. The immediate buckling model is based on a model of the present invention in which a deformation unit is not contracted by compressive force and generates an immediate bending deformation. As for the compressive force and stretching, simulation is implemented by separate models, hysteresis phenomenon of cloth is simulated by use of spring-clips for modeling, whereby cloth characteristics can be well reflected and the buckling instability of cloth caused by compressive force can be solved, thereby increasing the simulation speed.

Description

FIELD OF THE INVENTION The present invention relates to a method for simulating the movement of cloth and computer-readable media that stores a program which executes the method, and more particularly to an immediate buckling model, hysteresis model, and cloth simulation method based on the invented models, and computer-readable media storing the program which executes the invented simulation method. Deformation by compressive force applied at two extremities of the deformation unit which models cloth is simulated by an immediate buckling model that is immediately bent without contraction. Deformation by stretching force is simulated by a spring model, while cloth hysteresis characteristics are modeled by using new hysteresis models called “Kwang-Jin Choi and Hyeong-Seok Ko Discrete Hysteresis Model” (hereinafter referred to as Choi-Ko Discrete Hysteresis Model) and “Kwang-Jin Choi and Hyeong-Seok Ko Continuous Hysteresis Model” (hereinafter referred to as Choi-Ko Continuous Hyster...

Claims

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Application Information

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IPC IPC(8): G01N3/08D06H3/00G01N3/00G06F17/50G06F19/00G06T13/20G06T15/70G06T17/00
CPCG06F17/5009G06F2217/32G06T2210/16G06T17/00G06T13/20G06F30/20G06F2113/12
Inventor KO, HYEONG-SEOKCHOI, KWANG-JIN
Owner FXGEAR
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