树脂粘弹性与层板横向残余应力的关系

将单向芳纶 -铝合金层板纤维 /树脂层的模量表达为温度和时间的函数 ,为了确定函数中的常数 ,测定了纤维 /树脂层不同频率下的动态粘弹性能 ,测定温度为室温至 2 0 0℃ ,测定常数后 ,代入残余应力计算式进行积分求得层板横向的残余应力 ,为了验证计算结果 ,用应变片包埋法对单向芳纶 -铝合金层板横向残余应力进行了测定 ,并与实验结果进行了比较。结果表明 ,引入树指粘弹性参数的表达式可较准确地计算层板横向的残余应力

RELATIONSHIP BETWEEN TRANSVERSE RESIDUAL STRESS IN ARAMID-ALUMINIUM LAMINATE AND VISCOELASTICITY OF RESIN

The fibre/resin layers in the unidirectional aramid aluminium laminate were considered as viscoelastic layers and the modulus was expressed by a function of temperature and time. In order to determine the constant parameters in the function dynamic mechanical property of the fiber/resin layers was tested under dynamic load with different frequencies. The test temperature ranged from room temperature to 200℃. After the parameters in the function were determined, the transverse residual stress in the laminate was calculated. In order to examine the calculated results, strain gages were embedded in the unidirectional aramid aluminium laminates to measure the transverse residual stresses. The calculated results are in good agreement with the experimental values.