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首页> 外文期刊>Journal of Materials Engineering and Performance >Uniaxial Ratcheting Behavior of Dual-Phase Steel Sheet
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Uniaxial Ratcheting Behavior of Dual-Phase Steel Sheet

机译：双相钢板的单轴棘轮行为

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摘要

Uniaxial ratcheting behavior of an automotive-grade dual-phase steel sheet of 1.6 mm thickness has been investigated through engineering stress-controlled asymmetric cyclic loading experiments in the elastoplastic regime at ambient temperature (similar to 28A degrees C). Experiments have been performed keeping mean stress, stress amplitude or maximum stress constant. The effect of stress combinations on ratcheting deformation has been rationalized in terms of plastic strain amplitudes, both in loading and in unloading directions. It is found that for all stress combinations the steady-state ratcheting rate follows a perfect power relationship. Scanning electron fractography reveals that failure under asymmetric cyclic loading conditions occurs in a ductile manner through the formation of voids as it happens under tensile loading.
机译：通过在环境温度下的弹性塑料制度中的工程应力控制的不对称循环加载实验研究了1.6mm厚度的汽车级双相钢板的单轴棘轮行为。 已经进行了对平均应力，应力幅度或最大应力常数进行实验。 应力组合对棘轮变形的影响已经在装载和卸载方向上以塑性应变幅度而合理化。 结果发现，对于所有压力组合，稳态棘轮率遵循完美的电力关系。 扫描电子Fractography揭示了不对称循环负载条件下的失败，通过形成空隙，在拉伸载荷下形成空隙。

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