复合板材中心层的粘结强度系控制板材质量的重要指标,有关规范规定:粘结强度是用垂直板材平面的拉伸应力大小来度量,但该项试验复杂、测试困难、影响因素多、时间长。本文从理论和实验中证实了平面拉伸应力和平面扭转剪应力之间存在着直线关系,从而提出将规范改为用实验条件简单易行的平面扭转剪应力大小作为控制板材质量的指标。 The bond strength of the center layer of the composite sheet is an important index for controlling the quality of the sheet. The relevant specification states that the bond strength is measured by the tensile stress of the vertical sheet plane, but the test is complicated, difficult to test, and has many influencing factors. long. In this paper, it is confirmed from theory and experiment that there is a straight line relationship between plane tensile stress and plane torsional shear stress, and it is proposed that the criterion is changed to the plane torsional shear stress that is simple and easy to use as an index to control the quality of the plate.