Stress control device and method based on proportional coordinate transformation
A technology of coordinate transformation and stress control, applied in the field of mechanics, can solve problems such as unfavorable structural bearing, breaking or crushing, etc., to simplify the calculation of parameters, reduce the problem of stress concentration, and achieve the effect of stable performance.
Active Publication Date: 2017-09-12
TSINGHUA UNIV
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[0003] For a grid structure, when it contains a central hole area that is much larger than the lattice constant of the grid, it will produce more serious stress concentration under stress, and it will easily break or collapse, which is very important for the structural load. unfavorable
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[0038] Embodiments of the invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the accompanying drawings are exemplary and are intended to explain the present invention, but should not be construed as limitations to the present invention. Those of ordinary skill in the art can There are numerous changes, modifications, substitutions and variations to these embodiments, the scope of the present invention being defined by the claims and their equivalents.
[0039] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "length", "width", "thickness", "upper", "lower", "radial" etc. are based on The orientation or positional relationship shown in the drawings is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that...
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The invention discloses a stress control device and a method based on proportional coordinate transformation. The stress control device comprises a substrate. The substrate has a plurality of structural units which are distributed in an array and connected with one another to form a two-dimensional network structure. Each structural unit is a regular polygon with a plurality of connectors. Every two adjacent connectors are connected to form a connecting node, and every two adjacent structural units share one connector. The structural units in the middle of the substrate deform to divide the substrate into a basic structure area, a central hole area, and a coordinate transformation area. According to the stress control device of the embodiment of the invention, the positions of the connecting nodes are changed through coordinate transformation, and then, the length and other parameters of the connectors are changed in proportion. Thus, the stress distribution in the whole structure can be controlled, and the problem of stress concentration caused by the existence of the central hole area is reduced. Moreover, the structure is simple, parameters are easy to calculate, and structure design is facilitated.
Description
technical field [0001] The present invention relates to the technical field of mechanics, and more specifically, relates to a stress control device and method based on proportional coordinate transformation. Background technique [0002] At present, artificial structures have been able to realize materials with special properties in the fields of mechanics, electromagnetism, heat, and acoustics, achieving unprecedented and unique properties. Among them, in terms of mechanics, through artificial structure design, structures with specific Poisson's ratio structures, ultra-light structures, and impact-absorbing structures can be manufactured that cannot be achieved by traditional materials. However, to control the stress distribution of the structure to facilitate engineering design, it is necessary to face the complex and difficult-to-design fourth-order elastic tensor C, and the structural design can only be based on isotropic or simple anisotropic materials. In recent years...
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IPC IPC(8): G05D15/00G05D15/01G06F17/50
CPCG05D15/00G05D15/01G06F30/17G06F30/20
Inventor 赵乾海凌宇孟永钢
Owner TSINGHUA UNIV