The result mainly shows that: the larger the offset strain is defined the more the subsequent yield surface will expand in the direction no preloading and the less the vertex phenomena will present.

• 若采用平移应变法确定屈服应力，平移应变取值越大，后继屈服面在非预加载方向扩张越大且后继屈服尖点现象越不明显。