unidirectional ply meaning in English

单向层

A progressive damage method of predicting the static strength and the fatigue life of mechanically fastened joints in fibre - reinforced plastics is established in the paper , which is based on the theory of unidirectional ply
本文针对以上问题,首先以单层板理论为基础,建立了层合板接头静拉伸及疲劳载荷作用下三维逐渐损伤分析的强度和寿命预测方法。
An experimental program which includes lots of unidirectional laminae is conducted using t300 / bmp - 316 material for researching the static and fatigue behaviour of the unidirectional ply . the experimental research for mechanical behaviour of a unidirectional lamina is to set up expressions of the normalized fatigue life , the residual strength degradation and the residual stiffness degradation of a unidirectional ply in the longitudinal , transverse and in - plane - shear directions , which also verifies the fact of nonlinear shear stress - strain behavior of a unidirectional ply in the 1 - 2 planes
其中:分别对材料t300 / bmp - 316单向层合板纵向、横向及面内剪切静载力学性能及疲劳特性进行了试验研究,并采用最小二乘法拟合得到各主方向正则化疲劳寿命表达式,以及单层板各主方向疲劳加载剩余刚度退化表达式及剩余强度退化表达式;试验同时验证了单向层合板1 - 2面上明显的剪切应力应变非线性关系。