|
钢、灰铸铁与轻金属的平均疲劳极限 |
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|
材 料 |
拉 伸 |
弯 曲 |
扭 转 |
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|
对称 σ-1t |
脉动 σot |
对称 σ-1 |
脉动 σo |
屈服极限σbs |
对称 τ-1 |
脉动 τo |
屈服极限 τts |
|
|
结构钢 |
0.45σb |
1.3σ-1t |
0.49σb |
1.5σ-1 |
1.5σs |
0.35σb |
1.1τ-1 |
0.7σs |
|
调质钢 |
0.41σb |
1.7σ-1t |
0.44σb |
1.7σ-1 |
1.4σs |
0.30σb |
1.6τ-1 |
0.7σs |
|
渗碳钢 |
0.40σb |
1.6σ-1t |
0.41σb |
1.7σ-1 |
1.4σs |
0.30σb |
1.4τ-1 |
0.7σs |
|
灰铸钢 |
0.25σb |
1.6σ-1t |
0.37σb |
1.8σ-1 |
— |
0.36σb |
1.6τ-1 |
— |
|
轻金属 |
0.30σb |
— |
0.4σb |
— |
— |
0.25σb |
— |
— |