以 Na Cl薄液层模拟 LC4CS铝合金的大气腐蚀环境 ,并在实验室空气中、3 .5 % Na Cl溶液中和 Na Cl薄液层作用下研究 LC4CS铝合金的疲劳性能。结果显示 ,在 ΔK小于 40 0 N/mm3/2时 ,薄液层下铝合金的腐蚀疲劳裂纹扩展速率大于 Na Cl溶...以 Na Cl薄液层模拟 LC4CS铝合金的大气腐蚀环境 ,并在实验室空气中、3 .5 % Na Cl溶液中和 Na Cl薄液层作用下研究 LC4CS铝合金的疲劳性能。结果显示 ,在 ΔK小于 40 0 N/mm3/2时 ,薄液层下铝合金的腐蚀疲劳裂纹扩展速率大于 Na Cl溶液中的数值 ,也大于实验室空气中的数值。在ΔK较小时 ,薄液层下腐蚀疲劳裂纹断口的特征与 Na Cl溶液中的较为接近 。展开更多
The generalized two_dimensional problem of a dielectric rigid line inclusion, at the interface between two dissimilar piezoelectric media subjected to piecewise uniform loads at infinity, is studied by means of the St...The generalized two_dimensional problem of a dielectric rigid line inclusion, at the interface between two dissimilar piezoelectric media subjected to piecewise uniform loads at infinity, is studied by means of the Stroh theory. The problem was reduced to a Hilbert problem, and then closed_form expressions were obtained, respectively, for the complex potentials in piezoelectric media, the electric field inside the inclusion and the tip fields near the inclusion. It is shown that in the media, all field variables near the inclusion_tip show square root singularity and oscillatory singularity, the intensity of which is dependent on the material constants and the strains at infinity. In addition, it is found that the electric field inside the inclusion is singular and oscillatory too, when approaching the inclusion_tips from inside the inclusion.展开更多
文摘以 Na Cl薄液层模拟 LC4CS铝合金的大气腐蚀环境 ,并在实验室空气中、3 .5 % Na Cl溶液中和 Na Cl薄液层作用下研究 LC4CS铝合金的疲劳性能。结果显示 ,在 ΔK小于 40 0 N/mm3/2时 ,薄液层下铝合金的腐蚀疲劳裂纹扩展速率大于 Na Cl溶液中的数值 ,也大于实验室空气中的数值。在ΔK较小时 ,薄液层下腐蚀疲劳裂纹断口的特征与 Na Cl溶液中的较为接近 。
文摘The generalized two_dimensional problem of a dielectric rigid line inclusion, at the interface between two dissimilar piezoelectric media subjected to piecewise uniform loads at infinity, is studied by means of the Stroh theory. The problem was reduced to a Hilbert problem, and then closed_form expressions were obtained, respectively, for the complex potentials in piezoelectric media, the electric field inside the inclusion and the tip fields near the inclusion. It is shown that in the media, all field variables near the inclusion_tip show square root singularity and oscillatory singularity, the intensity of which is dependent on the material constants and the strains at infinity. In addition, it is found that the electric field inside the inclusion is singular and oscillatory too, when approaching the inclusion_tips from inside the inclusion.
