【正文】 e the finite element analysis, an actual fouroperation stamping process was conducted with the use of mm thick LZ91 sheet as the blank. The blank dimension and the tooling geometries were designed according to the finite element simulation results. A sound product without fracture and wrinkle was then manufactured, as shown in Fig. 6(a). To further validate the finite element analysis quantitatively, the thickness at the corners around the hinge of the sound product, as shown in Fig. 6(b), were measured and pared with those obtained from the finite element simulations, as listed in Table 1. It is seen in Table 1 that the experimental data and the finite element results were consistent. The fouroperation process design based on the finite element analysis was then confirmed by the experimental data. 13 Fig. 6. The sound product. (a) Without fracture and wrinkle and (b) locations of thickness measured. View thumbnail images Table 1. Comparison of thickness measured A B C D Experiment mm mm mm mm Simulation mm mm mm mm Error % % % % 6. Concluding remarks The press forming of magnesium alloy sheets was studied in the present study using the experimental approach and the finite element analysis. The formability of both AZ31 and LZ sheets was examined first. The research results indicated that the LZ91 sheet has favorable formability at room temperature, which is similar to that of AZ31 sheet at the forming temperature of 200 176。, S. K ? LZ91 magnesium–lithium alloy sheet。研究結(jié)果表明， LZ91板材在室溫下有良好的成形性，類似于 AZ31板材成形溫度在 200176。為了進一步驗證了有限元分析定量，厚度，在完善的產(chǎn)品的鉸鏈周圍的角落，如圖 6（ b）所示，進行測量和對比獲得的有限元模擬，如表 1 所列。最后一步是醒目的過程，是適用于校準所有的圓角半徑設(shè)計值。下一步是修剪外側(cè)壁的空白，并校準所需的圓角半徑 4毫米到 毫米的值。變形板材的最小厚度為 毫米及以上的成形極限圖的菌株。對有限元模擬進行研究的參數(shù)，影響斷裂的發(fā)生以及避免斷裂，提出了幾種方法。從實驗中獲得的材料特性和成形極限圖中使用的有限元模擬。 LZ101 板材在室溫下具有更延性比 LZ91 和 AZ31 在 200176。在本研究中， LZ 鎂合金板的成形性能和最佳的多工序沖壓工藝開發(fā)，以減少同時使用的實驗方法和有限元分析的操作程序。 最近，鎂，鋰（ LZ）合金也已研制成功，以提高鎂合金的室溫成形性。這也 印證了在制造筆記本蓋的情況下，可以用 LZ91 鎂合金板材的沖壓工藝生產(chǎn)。四步工序沖壓工藝的開發(fā)，以消在沖壓頂蓋的工藝的情況下產(chǎn)生裂縫和起皺缺陷。LZ91 鎂鋰合金板材 。 1999]和 [Drozd 等， 2020]）。鎂合金板材的力學(xué)性能 在室溫下進行拉伸試驗，比較其機械性能，在高溫下對 AZ31 張鎂鋰合金板材 LZ61（鋰 6％，鋅 1％）， LZ91， LZ101。以確定是否斷裂將發(fā)生在有限元分析，為 毫米厚的 LZ91 板材成形極限圖還建立了如圖 2（ b）所示。 圖 3 有限元模擬 （ a） 有限元網(wǎng)格和（ b）在角落斷裂。在本研究中，嘗試了 減少 運作程 序。然而，這個過程是產(chǎn)生起皺缺陷的關(guān)鍵，如圖 4（ d）所示，法蘭上的鉸鏈，導(dǎo)致在隨后的修剪操作中出現(xiàn)問題。研究修剪額外的表外側(cè)壁在第二步第三步的效果。相同的設(shè)計概念，然后擴展到完整的頂 蓋的沖壓工藝。 5 圖 6 完善的產(chǎn)品 （ a）無斷裂和皺紋（ b）測量厚度的位置。四步的操作過 程使其本身在筆記本比在目前的實踐中需要較少的操作程序，形成鉸鏈的有效途徑。C. It is noted that the stress–strain curve tends to be lower as the content of lithium increases. It is also observed from Fig. 2(a) that the curves of LZ91 sheet at room temperature and AZ31 sheet at 200 176。 Design Constitutive modeling for anisotropic/asymme... International Journal of Plasticity Improvement of ductility in magnesium alloy ... Materials Letters Simulation of magnesium alloy AZ31 sheet dur... Computational Materials Science Finite element simulation of magnesium alloy... Journal of Materials Processing Technology View more related articles Cited by (9) Quick gas blow forming behavior of AZ31B mag... Zhongguo Youse Jinshu Xuebao/Chinese Journal... Influence of cutting speed on flank temperat... Materials and Manufacturing Processes Influence of environmentally friendly electr... Zhongguo Youse Jinshu Xuebao/Chinese Journal... View details of all 9 citing articles in Scopus Provided by Scopus Related reference work articles . encyclopedias 16 Sintering: Modeling Encyclopedia of Materials: Science and Techn... Computational Modeling of Concrete St... Comprehensive Structural Integrity Finite Element Analysis in Bone Rese... Comprehensive Biomaterials Hard Tissues, Mechanical Properties of Encyclopedia of Materials: Science and Techn... NDT: Support by Modeling Encyclopedia of Materials: Science and Techn... More related reference work articles View Record in Scopus