For a carbon-fiber-reinforced plastic made of an ELUR-P unidirectional tape and an ХТ-118 cold-cure binder, specimens with a ±45° stacking sequence were tested for cyclic tension. The total axial strain was considered as the sum of nonlinearly elastic, viscoelastic, and irreversible creep strains. Using the Abel creep kernel, it was found that, at instants of time shifted by values multiples of the loading period, the ratios between the viscoelastic strain components depended neither on the period of cyclic loading, nor the loading amplitude, nor the parameter determining the degree of viscosity of the material, but only on the parameter determining the decrease in the rate of the viscoelastic strain. To find parameters of the creep kernel, an identification method based on the use of a hypothesis that allows one to separate reversible and irreversible creep strains, as well as on the properties of Abel creep kernel was developed. The method is illustrated by an example of processing experimental results.

中文翻译：

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循环载荷下复合材料的非弹性行为特征。实验和理论研究

对于由 ELUR-P 单向胶带和 ХТ-118 冷固化粘合剂制成的碳纤维增强塑料，对具有 ±45° 堆叠顺序的试样进行循环张力测试。总轴向应变被认为是非线性弹性、粘弹性和不可逆蠕变应变的总和。使用 Abel 蠕变核，发现在时间偏移了加载周期值倍数的瞬间，粘弹性应变分量之间的比率既不取决于循环加载周期，也不取决于加载幅度，也不取决于确定加载周期的参数材料的粘度程度，但仅取决于确定粘弹性应变速率降低的参数。要找到蠕变内核的参数，开发了一种基于使用假设的识别方法，该假设允许人们分离可逆和不可逆蠕变应变，以及基于 Abel 蠕变核的特性。该方法通过处理实验结果的例子来说明。