Reverse shape designing method for elastic object manufacturing
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A design method and elastic object technology, applied in computing, special data processing applications, instruments, etc., can solve problems affecting the accuracy of results, difficulty in iteration step size, slow convergence, etc., to meet application requirements, smooth design experience, and solution speed Enhanced effect
Active Publication Date: 2014-07-23
ZHEJIANG UNIV
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Although these methods are widely used, they have difficulty in determining the iteration step size and often use a predefined value
Too small step size will cause slow convergence, while too large step size will affect the accuracy of the result
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[0158] The inventors designed and fabricated 7 different models (see Table 1 for statistical data) to evaluate and verify the inverse shape design method proposed in the present invention.
[0159] Table 1: Statistics of the experimental model
[0160] Model
number of vertices
number of tetrahedrons
Number of targets
Number of external forces
Stripes
4552
19552
1
1
plant
14842
47077
1
1
mobile phone holder
18753
72355
1
3
Coat hanger
24323
98131
2
1 / 3
the eagle
19307
71235
1
1
Dinosaur
10673
32953
4
1 / 3 / 2 / 2
three branches
5093
24478
1
7
[0161] The manufacturing method of these elastic objects is as follows: firstly, a solid model is printed in 3D for making a silicone mold, and then cast with PU8400 elastic material to obtain the final elastic object. The following is the specific ...
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Abstract
The invention discloses a reverse shape designing method for elastic object manufacturing. The method comprises the following steps that a user assigns a material type, a target shape and a external force set interactively; based on the elastic deformation characteristics of an actual manufactured object, a hyperelastic material model with advanced predictive capacity is used as a representation model of object deformation; based on an asymptotic numerical value method, an advanced non-linear reverse static equilibrium equation is efficiently and precisely resolved, and the obtained shape can be transformed to the target shape designed by the user under a set external force condition; based on expansion of a core algorithm, interactive adjustment of external force, reverse design of multiple object shapes and quick resolving of forward static balance problems are supported; the technology means of quick forming and the like are used for manufacturing actual objects according with the design objects of the user. According to the reverse shape designing method for elastic object manufacturing, shape designing and technology manufacturing are integrated in a seamless mode so that the user can concentrate on designing of the target shape without worrying the influence of elastic deformation on finial product shapes.
Description
technical field [0001] The invention mainly relates to application fields such as industry / art design, product manufacturing / 3D printing / rapid prototyping, virtual object / role creation, and in particular to a reverse shape design method for elastic object manufacturing. Background technique [0002] The relevant technical background of the present invention is briefly described as follows: [0003] 1. Design for Manufacturing [0004] Computable design tools for creating geometries that can impose constraints on manufacturing or physical properties, such as structural stability, during the design process have emerged in recent research (WHITING, E., SHIN, H., WANG, R., OCHSENDORF, J., AND DURAND, F. 2012. Structural optimization of 3d masonry buildings. ACM Trans. Graph. 31, 6 (Nov.), 159:1–159:11.; STAVA, O., VANEK, J.,BENES,B.,CARR,N.,AND MˇE781CH,R.2012.Stress relief: Improving structural strength of 3d printable objects.ACM Trans.Graph.31,4(July),48:1–48:11. ), deform...
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