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    Rapid determination of fatigue property for CFRP laminates based on infrared thermographic method

    時間:2017-12-11來源:材料學院作者:余玲瀏覽:1055設置

    報告題目:Rapid determination of fatigue property for CFRP laminates based on infrared thermographic method

    報告人:黃甲

    時間:2017121116:30

    地點:5A427(材料學院會議室)

     

    報告人簡介:

    黃甲,博士研究生,200909-20136月,就讀于西北工業大學飛行器設計與工程專業;20139-20166月,就讀于西北工業大學固體力學專業球赛直播时间表2020,從事金屬材料沖擊載荷下力學性能研究,20169月至今球赛直播时间表2020,就讀于圖盧茲大學,從事基于紅外熱成像法的復合材料疲勞性能的快速測定研究,已發表SCI收錄論文5篇。

    報告內容簡介:

    We proposed three new treatment methods in terms of relation curve between experimental temperature response and the applied stress amplitude so as to determine the fatigue limit with uniqueness. Those three methods were all evaluated by applying to the experimental data from literature and the error of results were discussed and analyzed. In addition, numerical experiments were carried out to investigate the influence of loading stepped length and random error on each new treatment method.

    A new fatigue life prediction model combining temperature variation and damage accumulation is proposed. A mechanical stiffness degradation model is developed to characterize damage index. First, the improved thermographic method is used to determine fatigue limit based on the data of stabilized temperature rising. Following this, a two-parameter function are used to fit the normalized stiffness degradation data. Then, the normalized failure threshold stiffness can be calculated and by setting damage index, the whole S-N curve can be determined. Both experimental data from literature and new fatigue testing of unidirectional CFRP laminates are used to verify the new proposed model.

    地址:中國·四川·成都市 西華大學(610039)

    電話:(028)87720037 傳真:(028)87720200

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