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題名 | 纖維強化複合材料巨觀分析中之鍵解強度預測 |
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作 者 | 鄭榮和; 張鈞綸; | 書刊名 | 力學 |
卷期 | 10:4 1994.12[民83.12] |
頁次 | 頁275-287 |
分類號 | 440.2 |
關鍵詞 | 纖維強化; 金屬基複合材料; 鍵解; 界面強度; 有限元素法; 纖維壓出試驗; Fiber-reinforced; Metal matrix composites; Debonding; Interface strength; Finite element methods; Fiber push-out tests; |
語文 | 中文(Chinese) |
中文摘要 | 複合材料的力學行為遠較一般之材料複雜,除了其組成材料本身的性質能影響外 ,組成材料間的交互作用,更扮演著決定性的角色。為掌握複合材料內部的力學行為,以及 表現在外部的性質,往往要倚賴大量的試驗。在纖維強化複合材料的鍵解方面,剪力遲滯理 論是較具解釋力的工具,惟其處理的對象多為單一纖維的理想狀態。在現實世界中,纖維及 基材彼此交錯夾雜,欲以該理論從事多根纖維行為的預測,在計算上就有極大的困難。 本論文提出一個將微觀分析計算出的鍵解強度連接應用至整體複合材料的巨觀分析之程序。 我們首先以有限元素分析配合單纖維壓出實驗的結果而計算材料的一個基本性質:鍵結強度 。 接著以商用有限元素軟體 ABAQUS 中的 REBAR 功能加上前所得之強度來說明如何以最低 的分析成本預測複合材料結構受力時纖維與基材間的鍵解情形。 |
英文摘要 | The mechanical behavior of composite materials is more complex than ordinary materials. Besides the effect of the properties of its individual contituents that form the composite system, their interactions play an even more decisive role. In order to grasp the interior mechanics behavior and the apparent properties of a class of composite materials, one always has to rely on a great many tests. With respect to fiber-reinforced composite materials, the shear lag theory is a more powerful tool to explain the debonding mchanism, except that its application is often limited to the ideal situation with a single fiber. In reality, the fiber and matrix interwine and therefore present great difficulties in computation if the theory is to be applied to predict the debonding phenomena with multi-fiber systems. A procedure is presented in this paper to link the microscopic analysis of the debonding strength to the macroscopic analysis of a complete composite structure. We begin by calculating a basic property of the composite material: the debonding strength, based on a combination of finite element computations and experiments. Using the special REBAR capability of the commercial finite element program ABAQUS together with the afore-obtained strength, we then show that the debonding between the fiber and the matrix of a loaded composite specimen can be predicted with minimum costs. |
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