The nature and magnitude of residual stresses affect the performance and service life of the formed components. The state of residual stresses in the axisymmetric shapes have been characterized in Single Point Incremental Sheet Forming (SPIF). However, any study detailing thorough distribution of residual stresses on an asymmetrical shape has not been reported. In the present work, a detailed analysis pertaining to the distribution of residual stresses on an asymmetrical pyramid and stress-parameters relationship (s) are reported. The maximum stresses were induced in the smaller face (or side) of the pyramid followed by the region(s) bordering the edges/corners of the larger face, while the minimum stresses were induced at the bottom of the pyramid. The maximum compressive stresses ranged from −11 MPa to−292 MPa, and the maximum tensile stresses ranged from +6 MPa to +341 MPa. The cause-effect analysis reveals that the diameter and wall angle were the most influential process parameters. Further, as measured on the face center, the stresses varied from +1050 MPa (max tensile) to −650 MPa (max compressive). The results will prove helpful for the process and product design.

残余应力的性质和大小会影响所形成部件的性能和使用寿命。轴对称形状中的残余应力状态已通过单点增量板成形（SPIF）进行了表征。但是，尚未有任何详细研究不对称形状上残余应力的彻底分布的研究。在目前的工作中，报告了有关不对称金字塔上残余应力的分布以及应力-参数关系的详细分析。在金字塔的较小面（或侧面）中诱导出最大应力，然后在与较大面的边缘/角部接壤的区域中诱导出最大应力，而在金字塔的底部则引起了最小应力。最大压缩应力范围为-11 MPa至-292 MPa，最大拉伸应力为+6 MPa至+341 MPa。因果分析表明，直径和壁角是影响最大的工艺参数。此外，如在脸部中央测得的，应力从+1050 MPa（最大拉伸）到-650 MPa（最大压缩）变化。结果将证明对过程和产品设计有帮助。