Abstract In this paper, polypropylene (PP) was used as raw material to prepare rectangular parts. The temperature change data of the reinforcement with different molding parameters during the filling process were collected by using the injection molding temperature visualization experimental analysis platform. The electronic universal mechanical testing machine (EMUTM) was used for mechanical testing, and the micro-morphology of co-injection self-reinforced composites(CI-SRCs) parts and conventional parts with different temperature fields was observed and analyzed by Polarizing microscope (PLM) and Wide angle X-ray diffraction (WAXD), and the dimensionless equations among four variables (including molding parameters, area ratio of critical temperature field, area ratio of skin layer and mechanical properties) were established. From the results, it was found that the tensile properties of CI-SRCs parts with different molding parameters are superior to that of conventional parts, with a maximum increase of 18.64%. The overall performance of CI-SRCs parts is positively correlated with the performance of the reinforcement, and the performance of reinforcement is mainly determined by the area ratio of skin layer. The difference in the micromorphology characteristics of the parts depends on the change in the temperature field. Therefore, through microscope observation and simulation software analysis, it was obtained that the theoretical critical temperature field forming the orientation skin of the parts was 154.88 °C, and the temperature visualization platform was used to correct the critical temperature field obtained by simulation, and the real critical temperature field was about 170 °C. In the randomized trials, the simulated and actual area ratio of skin layer were in good agreement, with a maximum deviation of 8.9%, which proved that it was reliable to estimate the skin layer area ratio based on theoretical critical temperature field through the change of molding parameters, and then to predict the performance change of the parts.

中文翻译：

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基于温度场的共注塑自增强复合材料零件性能预测

摘要 本文以聚丙烯（PP）为原料制备矩形零件。利用注塑温度可视化实验分析平台，采集不同成型参数的增强体在填充过程中的温度变化数据。采用电子万能力学试验机（EMUTM）进行力学试验，采用偏光显微镜（PLM）对共注射自增强复合材料（CI-SRCs）零件和常规零件在不同温度场下的微观形貌进行观察和分析。 )和广角X射线衍射(WAXD)，建立了四个变量(包括成型参数、临界温度场面积比、表层面积比和力学性能)之间的无量纲方程。从结果来看，结果表明，不同成型参数的CI-SRCs零件的拉伸性能优于常规零件，最大提高了18.64%。CI-SRCs零件的整体性能与增强体的性能呈正相关，增强体的性能主要由表层面积比决定。零件微观形态特征的差异取决于温度场的变化。因此，通过显微镜观察和仿真软件分析，得出零件定向表皮形成的理论临界温度场为154.88℃，并利用温度可视化平台对仿真得到的临界温度场进行校正，得到零件取向表皮的理论临界温度场为154.88℃。实际临界温度场约为 170 °C。