The objective of this work is to determine a low cycle fatigue criterion for a thermoplastic matrix composite reinforced with both short and continuous fibres. The proposed criterion is based on the steady state creep strain rate and unifies the results for different fibre orientations, stress ratio, frequency and water content. The criterion is applicable in low cycle fatigue and creep. By means of this criterion, the Monkman–Grant relationship is verified both for creep and low cycle fatigue and offers interesting perspectives for numerical approaches.

中文翻译：

---

混合复合材料的短期蠕变和低周疲劳统一准则

这项工作的目的是确定用短纤维和连续纤维增强的热塑性基体复合材料的低周疲劳标准。所提出的准则基于稳态蠕变应变率，并统一了不同纤维取向、应力比、频率和含水量的结果。该准则适用于低周疲劳和蠕变。通过这个标准，Monkman-Grant 关系得到了蠕变和低周疲劳的验证，并为数值方法提供了有趣的视角。