Úvod
Shear intensity means the ability of the material to withstand the shear force, code σc, is perpendicular to the outer force and the axis of material, and the intensity limit of the material when the material is shear. In line with a square millimeter, the unit pressure of this area is called the shear strength. Thousand Newon divided by unit area, KN / MM 2 ;
Intenzitou smyku se rozumí schopnost materiálu odolávat smyku. Pevnost ve smyku kompozitní desky z nerezové oceli se vztahuje ke schopnosti rozhraní dvou kovových kompozitů odolávat smyku. Národní norma (GB / T8165-2008) stanoví, že pevnost ve smyku z nerezového kompozitního plechu je 210 MPa. Ve výrobní praxi může pevnost ve smyku za tepla válcované nerezové kompozitní desky dosáhnout 345 MPa. Velikost smykové intenzity ukazuje na silný stupeň pevnosti povlaku nerezové kompozitní desky a základní vrstvy. Čím jasnější kombinace, tím lepší procesní výkon nerezových kompozitních panelů. Proto je pevnost ve smyku nejdůležitějším technickým ukazatelem kompozitních panelů z nerezové oceli. Kromě pevnosti ve smyku zahrnují další mechanické vlastnosti kompozitních panelů z nerezové oceli: mez kluzu, pevnost v tahu, tažnost, rázový výkon, vnitřní a vnější testovaný test atd.
Aplikace na lepidlo
Shear intensity represents the maximum fracture load on the unit area of the bonding adhesive in the tangential direction. Depending on the force method, it can be divided into several tensile shear strength, compression shear strength, torsion shear strength, bending shear strength, and the tensile shear strength is most commonly used. The tensile shear intensity assay is generally 12.5 cm × 2.5 cm × 1.6 mm, which is a single-sided lap, and the surface length is about 12.5 mm ± 0.25 mm. When the test piece was measured, the adhesive was uniformly coated on the test piece, and then two test pieces were laminated, and the curing was carried out under a predetermined condition, and the width direction of the two test sheets did not exceed 0.5. MM. The test piece applied a load on a constant stretchable speed of Lomm / min on a tensile test machine until the test sheet was destroyed. Make a note of the damage load on the test machine diagram, and calculate the shear strength (W):
w = p / f = p / ab
, p> To damage the load, N; f is the lap area, CM2; A is the lap surface length, cm; B is a width, Cm. The test piece is not less than five pairs, and the lap area should be calculated based on the values of the actual measurement after the test piece destroy, accurate to 0.01 cm2. At higher, long-term working adhesives should measure the strength at different temperatures. The usual test temperature is 60 ° C, 0 ° C, 60 ° C, 100 ° C, 150 ° C, 200 ° C, and 250 ° C, should be loaded or cooling on the test machine when testing, and the test sample should be maintained at test temperature 30 ~ 45min.