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題 名 | 蠟型與殼模之熱傳導率及熱膨脹係數對於殼模熱應力影響之研究=The Effect of Thermal Conductivites and Thermal Expansion Coefficients of Wax and Shell Mold on the Thermal Stress of Shell Mold |
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作 者 | 洪嘉鍾; | 書刊名 | 鑄工 |
卷 期 | 24:1=96 1998.03[民87.03] |
頁 次 | 頁46-55 |
分類號 | 472.22 |
關鍵詞 | 熱傳導率; 熱膨脹係數; 分離變數法; 彈性力學解; 熱應力; Thermal conductivity; Thermal expansion coefficient; Method of separating variables; Elasticity solution; Thermal stress; |
語 文 | 中文(Chinese) |
中文摘要 | 本文係藉數值運算技巧探討包覆實心蠟型之圓柱殼模於受熱後其溫度與熱應力之 分佈情形,藉以了解加熱脫蠟程序中蠟型與殼之熱傳導率與熱膨脹係數對裂模之影響。解析 法則分為兩部份,其一即利用分離變數法求解熱傳方程式以推得蠟型與殼模之溫度分佈式, 其二則套用彈性力學解並配合前述溫度而得殼模之熱應力。結果顯示蠟型與殼模之熱膨脹係 數(前者)與熱傳率(後者)值愈大,則殼模所受之熱應力愈大,且前者所產生之效應較大於後 者。 |
英文摘要 | By using the technique of numerical algorithm, the article demostrates the development of temperature and thermal stress for the cylindrical shell mold enclosing solid wax during heating. This is for the sake of realizing the effect of the thermal conductivity and thermal expansion of wax and shell mold on the shell cracking during dewaxing process. The analytic approach is divided into tow parts, one is to derive the formula of temperature distribution by using the method of separating variables to solve the heat-conduction equation, the other is to calculate the thermal stresses by superposing the above temperature on the elasticity solution. The results show that the larger the thermal expansion (former) and thermal conductivity (latter) of wax and shell mold, the larger the thermal stresses of shell mold. And the former has a great effect on the shell mold than the latter. |
本系統中英文摘要資訊取自各篇刊載內容。