不同裂縫型態與修補試片之複合材料層板的應力強度因子

Stress Intensity Factors of Composite Laminates with Different Types of Cracks and Patch Test Fragments

賴峯民(Feng-Min Lai) ； 薛鈞謄(Chun-Teng Hsueh) ； 陳裕偉(Yu-Wei Chen) ； 曹季涵(Chi-Han Tsao)

《科學與工程技術期刊》 6卷1期 (2010/03) Pp. 57-74

https://doi.org/10.7117/JSET.201003.0057

摘要

本文主要是運用ANSYS有限元素軟體進行複合材料裂縫試片及裂縫修補試片的應變及應力強度因子分析，以建立正確的模型分析及應力強度因子計算方法，其間並運用不同元素性質建立ANSYS分析模型，以文獻進行各種裂縫試片比對，以確認元素及建模方式的正確性。而實驗部分則利用樹脂轉注成形法(resin transfer molding, RTM)、手積層堆疊法及碳纖預浸材製作不同複合材料裂縫試片（雙邊裂縫、中央穿孔及中央裂縫）及裂縫修補試片（雙邊裂縫及中央裂縫修補），來進行拉伸實驗，並求取各式試片的應變及應力強度因子之實驗數據，以模型分析理論值進行比對驗証。由文獻比對中得到較正確建模及邊界條件方式，透過實驗與模型分析數據進行比對來確認模型吻合性，也證實ANSYS有限元素軟體可用來模擬結構件在裂縫分析上之問題。

關鍵字

裂縫 ； 修補試片 ； 應力強度因子 ； 樹脂轉注

並列摘要

In this research, natural elements such as a plane, a solid, and a shell were used to build a model for analyzing various cracks therein for comparison with the literature to confirm the accuracy of the model. In the experiments, manufacturing methods such as resin transfer molding (RTM), the hand lay-up technique and carbon fiber prepreg of materials were used to produce different types of cracks such as bilateral, central, and centrally perforated in composite laminate samples as well as in a patch test fragment for a tensile test. A theoretical analysis of the model was used to compare and verify a variety of experimental data on the cracks therein with the tip stress intensity factor. This study primarily used ANSYS finite element software to analyze the strain and stress intensity factors of composite laminates and the cracks in a patch test fragment to establish an accurate analytical model and calculation method. Furthermore, ANSYS simulation to analyze the structure of cracks can be recommended.

並列關鍵字

cracks ； patch test fragments ； stress intensity factors ； resin transfer molding RTM