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剪切试验一、试验的目的: 一般地说,在通过某点的任意截面上,材料都受到两种类型的应力作用:正应力和剪应力。这两种应力对材料的作用是不同的。正应力有使材料沿垂直于该截面的方向上伸长(或缩短)的作用,当正应力超过材料的正断抗力(或压缩强度)时,材料就在该点通过该面被拉断了(或压坏了);剪应力有使材料沿平行于该截面的方向滑移的作用,当剪应力超过了材料的剪
Shear test First, the purpose of the test: In general, the material is subjected to two types of stress at any section through a point: normal stress and shear stress. The effect of these two stresses on the material is different. Normal stress has the effect of elongating (or shortening) the material in a direction perpendicular to the cross-section, at which point the material is pulled off when the normal stress exceeds the positive resistance (or compressive strength) of the material (Or crushed). Shear stress has the effect of slipping material along a direction parallel to the cross-section. When the shear stress exceeds the shear of the material