複合材料層板膠黏式修補有限元素分析

本文以有限元素數值方法探討連接件在膠黏區之應力分佈，包括膠層剪應力與上下連接件拉應力，其中上下搭接件皆為傳統二維有限元素，膠層則為推導之特殊元素，此元素可將膠黏三維結構簡化成二維結構，並可免去細分膠層網格的困難。本文將此膠層特殊元素應用於膠黏式搭接件接頭分析及雙補片修補分析，並與一維彈性力學解析解比較，再以參數分析探討膠層厚度、材質、及補片大小、厚度、材質對接頭強度及修補效果之影響。接頭強度係以膠層兩端最大剪應力為評估標準，剪應力愈大表示愈容易使膠層破壞，接頭強度愈弱，修補效果則以修補前後主板最大應力之變化為評估標準。

關鍵字

膠層元素；有限元素分析；膠層剪應力；膠黏式搭接件；膠黏式修補

並列摘要

The specialized adhesive element is developed to study the stress distribution on the adhesive, It has the advantages of reducing the adhesive bond problem into two-dimension in-plane problem, and avoiding fined meshes in the adhesive. The special adhesive element is adopted to analysis the cases of adhesive-bonded lap joints and double patch reparation. In the case of lap-joints, the finite element numerical solutions are compared with theoretical results base on the one dimension classical elastic theory. For reparation, the damage area is simulated as a hole on a composite laminate. The repair efficiency is evaluated by comparing the stress concentration factor on the damaged hole before and after reparation. The geometric parameter such as thickness of adhesive, adherent, patch and material parametric analysis.

並列關鍵字

adhesive elements ； finite element method ； shear stress in adhesive ； adhesive ； adhesive-bonded lap joint ； adhesive bonded reapair

參考文獻

[2] S. H. Myhre, and C. E. Beck,” Repair Concepts for Advanced Composite Structures”, J. Aircraft, Vol. 16, No. 10, pp. 720-728, 1979

[3] S. H. Myhre, and J. D. Labor, “ Repair of Advanced Composite Structures”, J. Aircraft, Vol. 18. No.7, pp. 546-552, 1982

[4] Jones, R. and Callinan, R. J., “ On The Use of Special Crack Tip Elements in Cracked Elastic Sheet,” Int. J. Fracture 13, 51-64, 1977

[5] Jones, R. and Callinan, R. J., “ finite element Analysis of Patched Cracks,’ Journal of Structure Mech., 1979, pp. 107-130

[7] Jones, R., Callinan, R. j. and Aggarwal, K. c.., “ Analysis of Bonded Repairs to Damaged Fiber Composite Structure,” Engineering Fracture Mechanics 17, pp. 37-46, 1983

國際替代計量

複合材料層板膠黏式修補有限元素分析

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