Introduction
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 ;
Shear intensity means the ability of the material to withstand shear. The shear strength of the stainless steel composite plate refers to the ability of the two metal composite interface to withstand shear. The national standard (GB / T8165-2008) stipulates that the stainless steel composite plate shear strength is 210 MPa. In production practice, the shear strength of the hot-rolled stainless steel composite plate can reach 345 MPa. The size of the shear intensity indicates a strong degree of firmness of the coating of the stainless steel composite plate and the base layer. The brightering the combination, the more excellent process performance of stainless steel composite panels. Therefore, shear strength is the most important technical indicator of stainless steel composite panels. In addition to shear strength, other mechanical properties of stainless steel composite panels include: yield strength, tensile strength, elongation, impact performance, internal and outer tested test, etc.
Application on the adhesive
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.