在材料力学的常规拉伸试验中,往往仅关心拉伸失稳而忽视了材料是否失稳。本文从理论上对拉伸试验中的材料失稳和拉伸失稳之间的关系进行了详细深入的探讨,并得出了有益的结论。实验结果也验证了结果的合理性。 In the conventional tensile tests of material mechanics, it is often only concerned with the tensile instability and ignores the material is not stable. In this paper, the relationship between material instability and tensile instability in tension test is theoretically investigated in detail, and some useful conclusions are drawn. The experimental results also verify the rationality of the results.