应用叠加原理和对称—反对称原理计算正交各向异性板Griffith裂纹的应力强度因子K<SUB>Ⅰ</SUB>K<SUB>Ⅱ</SUB>

应用叠加原理和对称—反对称原理计算正交各向异性板Griffith裂纹的应力强度因子K_ⅠK_Ⅱ

摘要: 近二、三十年来,随着空间技术、造船、航空、导弹和原子弹等尖端技术的迅猛发展,对材料的比强度、比刚度、冲击韧性、疲劳寿命和耐高温的性能提出愈来愈苛刻的要求,于是广泛地采用由各种合成材料制成的正交各向异性板。当然有必要研究这种构件中的裂纹的应力强度因子问题。

Abstract: This paper gives the proof that the crack stress intensity factors in the orthotropic elasic plate can be calculated by using the superposition principle, and illustrates the application of symmetry-skewsymmetry principle to the Griffith crack-tip stress intensity factors. K_Ⅰ and K_Ⅱ of the Griffith Cracks in the orthotropic plate for more than twenty loading conditions are calculated by the application of these two principles, and their general application formulae are also tabulated.