| 约束开裂复合材料层板的裂纹密度计算与斜交铺层处理 |
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| 引用本文： | 华玉,何庆芝,郦正能,寇长河.约束开裂复合材料层板的裂纹密度计算与斜交铺层处理[J].航空学报,1994,15(3):303-309. |
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| 作者姓名： | 华玉 何庆芝 郦正能 寇长河 |
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| 作者单位： | 北京航空航天大学五系,北京,100083 |
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| 摘 要： | 对约束开裂复合材料层板给出随裂纹密度变化的刚度衰减公式。构造了裂纹密度与损伤区应力的关系函数,借助这一函数可由损伤区应力直接预测其刚度衰减。引入两次转轴变换方法,将刚度衰减公式由９０°基体开裂推广到应用于±θ层的基体开裂。
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| 关 键 词： | 复合材料层板 基体开裂 裂纹密度 刚度衰减 斜交铺层 |
| 收稿时间： | 1993-09-08 |
| 修稿时间： | 1993-11-27 |
CALCULATION OF CRACK DENSITY AND MANIPULATION OF ANGLE-PLIEDLAMINA FOR COMPOSITE LAMINATES WITH CONSTRAINED CRACKING |
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| Hua Yu, He Qingzhi, Li Zhengneng, Kou Changhe.CALCULATION OF CRACK DENSITY AND MANIPULATION OF ANGLE-PLIEDLAMINA FOR COMPOSITE LAMINATES WITH CONSTRAINED CRACKING[J].Acta Aeronautica et Astronautica Sinica,1994,15(3):303-309. |
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| Authors: | Hua Yu He Qingzhi Li Zhengneng Kou Changhe |
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| Institution: | Fifth Department, Beijing University of Aeronautics and Astronautics,Beijing, 100083 |
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| Abstract: | Stiffness degradation formulas are given for a composite laminate with constrained cracking.Because the formulas are expressed as a function ofcrack density,the relation between crack density and stresses in the damage zone is constructed so as to predict the stiffness degrada- tion directly from the stress distribution in damage zone. The generalization of the stiffness deg- radation formulas is made for any angle-plied lamina by rotating the coordinate axes twice. |
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| Keywords: | composite laminate matrix cracking crack density stiffness degradation angle-plied lamina |
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