材料力学中中性面变形后明显是曲面变形前是直的。明显曲线的长度要大于直线的长度,为什么中性面变形为零? 知乎 Template




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tomski材料力学中中性面变形后明显是曲面变形前是直的。明显曲线的长度要大于直线的长度,为什么中性面变形为零? 知乎 coloring