A kind of composite materials 4 d printing process

A kind of composite materials 4 d printing process a kind of composite materials 4 d printing process

in a competitive game, now, a new method, namely the composite material of 4 d print, for the manufacture of objects like a satellite provides a faster, more low cost technology.
this method is to use 3 d printers to create an object, once left 3 d printers, objects will shape change over time. In this case, the fourth dimension is a kind of activation mechanism, such as heat, light and magnetic field, or absorb moisture.
Concordia college of engineering and computer science ( 'ENCS') Industry and aerospace engineering mechanics department professors, researchers, Suong Van Hoa promoted the surface structure of mould manufacturing.
'4 d printing allows us to create curved composite structures without making surface mould. 'Suong Van Hoa said,' the main finding is that I can use with long continuous fiber Gao Lixue performance, faster and more economical production of surface composite material components. '
last autumn, Suong Van Hoa with its through research, practice, education and services for outstanding contributions to the community of composites was appointed member of American society for composite materials. In the Advanced Manufacturing magazine published his latest findings, the article title is: polymer and composite materials science. Working principle of the


composite plate spring as a lightweight automobile shock absorber, the manufacturing time is usually long.
, for example, do a S shape of parts, first of all, need to use the same metal solid materials to make a pair of s-shaped mould; Then, put the resin prepreg reinforced fabric shop in mold, to make composite material parts.
but Suong Van Hoa has said, the first step, which makes a complex mould can be omitted, in order to save time and cost. As the Concordia composite material center ( 'CONCOM') The creation of the head, his findings show how the production process to provide efficiency significantly.
'composite material of 4 d print using the matrix resin shrinkage and thermal contraction coefficient of different fiber orientation layer, thus by activating during solidification cooling to change shape. 'He said,' this kind of behavior can be used to manufacture with curved surface shape of parts, with no need for complicated mold. Also, can quickly and economically parts to make curved shape. Shape change, however, depends on the material performance, fiber orientation, layer order and manufacturing process. '


a new method to achieve as a result, he says Suong Van Hoa to reconsider the anisotropic properties of composite material layer.
anisotropy can be defined as materials in not under axial load is how to play a different role. A material anisotropy is how to measure it the scale of the relationship between change and other factors.
in the Advanced Manufacturing magazine papers published in the 'polymer and composite materials science' Suong Van Hoa outlined in the construction of composite material structure play a role in anisotropic characteristics. Will result in the resin shrinkage of material deformation, for example, or, the temperature change will cause fiber expansion or contraction. To understand and control these changes, is the key to not adopt surface mould manufacturing surface laminate.
'anisotropic characteristics is regarded as a kind of tendency in the past, now we see it as an advantage. 'Suong Van Hoa said.

let fall innovation
in addition to other areas, this will eventually be applied to the aerospace industry.
Suong Van Hoa said: 'another application is like satellite space structure, the structure can withstand extreme temperature fluctuations. During the day, When high temperature) These structures will open to collect solar energy, night closed for their internal protection. 'Conversion table packaging printing knowledge