The Influence of Structural, Technological Parameters and Strain State on Anisotropy of Mechanical Properties of Sheet Porous Net Materials

Porous net materials are anisotropic in the sheet plane. Their mechanical properties are defined not only by the design and technological parameters of the manufacturing process, but also by the strain state type of loading. Analytic relationships defining strength, plasticity, and anisotropy of the nets and porous net materials at uniaxial and biaxial tension are obtained on the basis of the proposed model, being geometrically similar to the nets of the size under investigation. It is shown that the porous net materials made of filtering nets arranged in parallel are characterized by the highest anisotropy. The use of the nets with square meshes arranged in a briquette at a 45° angle, resulted in a considerable reduction of anisotropy. When transitioning from uniaxial to biaxial tension, the material strength and plasticity decrease and reach minimal values at symmetric biaxial tension.

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