The theoretical analysis and experiment outcome indicate that geomagnetic field and testing environment have momentous effect on testing outcome, that specimen should be laid transmeridionally as soon as possible while testing and that the swing value and
The theoretical analysis and experiment outcome indicate that geomagnetic field and testing environment have momentous effect on testing outcome, that specimen should be laid transmeridionally as soon as possible while testing and that the swing value and
理论分析和实验结果表明：地磁场和检测环境对检测结果会产生较大影响，检测时应尽可能将试件东西方向放置；疲劳试件断裂前后的磁记忆信号的幅值和过“0”线将发生变化。