在航空與汽車產業中，異質接合技術可用於提升結構件的輕量化與強度。本研究探討聚醯胺6 (polycaprolactam, PA6)與鋁嵌件的異質接合，並使用熱固性碳纖維預浸布纏繞鋁嵌件製作拉伸試片，接著對此試片的機械性能進行量測。此外，為預測射出成型製程，本研究在實驗前使用模流軟體先進行模擬分析，預測充填過程中嵌件區域的溫度變化與型芯偏移行為，以驗證實驗結果與模擬結果的趨勢一致。
模擬結果顯示，靠近鋁嵌件處的塑料溫度下降快速主要是因為熱傳導係數不同，可能會導致成型品內部冷卻不均勻的問題，進而對成型品的機械強度和尺寸穩定性產生負面影響。型芯偏移結果顯示，纖維在橫向偏移量較大，但仍能夠完全被塑料包覆，不影響試片成型品質。
接著以手工方式製備預製件，分別採用纖維方向平行與垂直於拉伸方向之兩種纏繞方式，同時比較碳纖維預浸布是否預先固化，對界面行為的影響。在拉伸試驗結果顯示，纖維方向平行於拉伸方向時能夠提升抗拉強度，尤其未固化之組別的抗拉強度達101.88 MPa，與純PA6試片相比提升55%，顯示此方法有效增強機械性能。抗拉強度能夠提升是由於纖維排列方向與拉伸方向一致，以及未固化的碳纖維預浸布之樹脂能與PA6形成化學鍵結，形成良好的界面鍵結，使PA6塑料能夠將應力傳遞至纖維上，從而提升抗拉強度。本研究顯示，碳纖維預浸布能顯著提升異質接合試片的機械性能，提供了一種可應用於高強度輕量化結構件，可提供航太、汽車以及曲柄連桿產業的應用。

Heterogeneous bonding improves lightweight design and structural strength in the aerospace and automotive industries. This study investigates the tensile strength of specimens fabricated by integrating Polycaprolactam 6 (PA6), aluminum inserts, and thermosetting carbon fiber prepreg. Injection molding simulation software was employed to analyze temperature variations around the insert and core displacement during the filling process. The results revealed that the temperature of PA6 near the aluminum insert decreased rapidly due to disparities in thermal conductivity. This phenomenon may lead to uneven cooling, potentially compromising mechanical strength and dimensional stability. Core shift analysis indicated lateral displacement of the carbon fiber. However, the fibers were still fully covered, which ensured proper specimen formation.
Two fiber orientations were selected for hand-wrapping the carbon fiber prepreg: one aligned with the tensile direction, and the other perpendicular. Moreover, the effect of carbon fiber prepreg pre-curing on interfacial bonding behavior was evaluated. Tensile testing demonstrated that specimens reinforced with uncured carbon fiber prepreg aligned with the loading direction exhibited an average tensile strength of 101.88 MPa, representing a 55% increase compared to pure PA6 specimens. The tensile strength was enhanced by the alignment of the fibers with the loading direction, as well as the chemical bonding between the uncured resin of carbon fiber prepreg and PA6. This interfacial bonding enables PA6 to transfer stress to the fibers effectively. These findings confirmed that carbon fiber prepreg significantly enhances mechanical performance and is suitable for lightweight, high-strength applications in the aerospace, automotive, and bicycle industries.

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