Interlaminar Shear Strength and Porosity of Thermoplastic Fiber Placement Component
CAO Zhongliang1,2, GUO Dengke2, LIN Guojun2, HAN Zhenyu3, FU Hongya3
1 School of Mechanical Engineering, Jiangsu University of Technology, Changzhou 213000, China 2 School of Mechatronics Engineering, Qiqihar University, Qiqihar 161001, China 3 School of Mechatronics Engineering, Harbin Institute of Technology, Harbin 150001, China
Abstract: The in-situ curing technology is applied in the thermoplastic fiber (AS4/PEEK, melting point temperature 343 ℃) placement, so the interlaminar property directly affect the mechanical properties of the thermoplastic composite component after placement. In this paper, accor-ding to the principle of uniform test method, the placement test and interlaminar property test were designed,the data of interlaminar shear strength and porosity were obtained. The cross-sectional laminates were observed by SEM, at the same time, the interlaminar shear strength and porosity of the thermoplastic fiber placement component were optimized. Results showed that, based on the performance test data of the placement test component, it is obtained that as the heating temperature and the placement pressure increase, the interlaminar shear strength increases and as the placement speed increases, the interlaminar shear strength decreases on the contrary; the porosity has a positive correlation with the placement speed and heating temperature, and decreases with the increase of the placement pressure. When the placement speed is 6.00 mm/s, the hot air temperature is 699.35 ℃ and the placement pressure is 539.94 N, the maximum interlaminar shear strength of the component was predicted to be 52.15 MPa; when the placement speed is 6.00 mm/s, the hot air temperature is 630.04 ℃ and the placement pressure is 530.00 N, the minimum porosity of component was predicted to be 1.98%. The final test results are basically consistent with the prediction results, which has a certain practical value for the application level of thermoplastic fiber in the manufacturing field of our country.
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2021, Vol. 35 
