激光焊接带口盖加筋壁板剪切性能分析

回丽; 陈晓伟; 周松; 杨文军; 王磊

doi:10.13700/j.bh.1001-5965.2018.0414

激光焊接带口盖加筋壁板剪切性能分析

doi: 10.13700/j.bh.1001-5965.2018.0414

回丽^{1, 2},
陈晓伟¹,
周松^{1, 2, ,},
杨文军^{1, 2},
王磊^{1, 2}

1.
沈阳航空航天大学机电工程学院, 沈阳 110136
2.
沈阳航空航天大学航空制造工艺数字化国防重点学科实验室, 沈阳 110136

基金项目:

辽宁省教育厅高等学校科学研究项目 L201633

沈阳航空航天大学航空制造工艺数字化国防重点学科实验室开放基金 SHSYS2017006

沈阳航空航天大学青年博士科研启动基金 18YB05

详细信息

作者简介:
回丽女, 博士, 教授。主要研究方向:航空材料与结构强度; 周松, 男, 博士, 讲师。主要研究方向:航空材料与结构强度

通讯作者:
周松, E-mail:zhousong23@163.com

中图分类号: V223⁺.3
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- 被引次数: 0
出版历程
- 收稿日期: 2018-07-09
- 录用日期: 2018-11-08
- 网络出版日期: 2019-03-20

Shear property analysis of laser welding stiffened panel with cover

HUI Li^{1, 2},
CHEN Xiaowei¹,
ZHOU Song^{1, 2
, ,},
YANG Wenjun^{1, 2},
WANG Lei^{1, 2}

1.
School of Mechatronics Engineering, Shenyang Aerospace University, Shenyang 110136, China
2.
Key Laboratory of Fundamental Science for National Defence of Aeronautical Digital Manufacturing Process, Shenyang Aerospace University, Shenyang 110136, China

Funds:

Education Department of College Scientific Research Project of Liaoning Province L201633

Key Laboratory of Fundamental Science for National Defence of Aeronautical Digital Manufacturing Process Open Fund of Shenyang Aerospace University SHSYS2017006

Shenyang Aerospace University Young Doctoral Research Fund 18YB05

More Information

Corresponding author: ZHOU Song, E-mail: zhousong23@163.com

摘要

摘要:
针对双光束激光焊接带口盖加筋壁板开展了剪切稳定性试验，分析了带口盖加筋壁板在受剪状态下的屈曲载荷、屈曲形式、后屈曲承载能力及破坏形式。建立了壁板与剪切夹具的有限元模型，对壁板的剪切失稳形式及后屈曲承载能力进行仿真计算，并探究了口盖对加筋壁板的承载能力、应力变化及面外变形的影响。结果表明：带口盖加筋壁板在剪切状态下，当屈曲比达到1.95时，加筋壁板进入后屈曲，最终破坏载荷约为屈曲载荷的2.98倍。仿真与试验得到的载荷-位移曲线较为吻合，有限元法得到的屈曲载荷和破坏载荷与试验平均值误差分别为8.7%、1.02%。开口壁板的承载能力及刚度均下降，螺栓紧固口盖对加筋壁板的应力与面外变形影响较大。
- 加筋壁板 /
- 口盖 /
- 剪切载荷 /
- 有限元 /
- 屈曲性能
Abstract:
Shear stability test was carried out on the dual beam laser welding stiffened panel with cover. The buckling load, buckling form, post-buckling carrying capacity and failure modes of the stiffened panel with cover under shear loading were analyzed. A finite element method was utilized to model the stiffened panel and shear fixture. Simulation calculation of shear instability modes and post-buckling carrying capacity of stiffened panel. Meanwhile, the effects of cover on the carrying capacity, stress distribution and deformation of cutout stiffened panels were investigated. The results show that, in the sheared state of the stiffened panel with cover, when the buckling ratio reaches 1.95, the stiffened panel enters into post-buckling and the final failure load is approximately 2.98 times the buckling load. The load-displacement curves obtained from simulation and test are in good agreement, and the errors for the buckling loads and failure loads obtained from the numerical calculations compared with the test average value are 8.7% and 1.02%, respectively. The rigidity and load-carrying capacity of open stiffened panel reduce, and the bolt fastening cover has a great influence on the stress and out-of-plane deformation.
- stiffened panel /
- cover /
- shear loading /
- finite elements /
- buckling property

HTML全文

图 1 带口盖钛合金加筋壁板示意图

Figure 1. Schematic diagram of titanium alloy stiffened panel with cover

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图 2 隔框、筋条、连接角片、口盖和加强口框尺寸

Figure 2. Size of frame, stiffener, connector gusset, cover and reinforced opening frame

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图 3 剪流分布

Figure 3. Distribution of shearing flow

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图 4 试验系统

Figure 4. Test system

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图 5 应变片粘贴位置与编号

Figure 5. Pasting position and number of strain gauge

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图 6 两件试验件破坏形式

Figure 6. Failure modes of two specimens

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图 7 试验件局部破坏形式

Figure 7. Local failure modes of specimens

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图 8 2#试验件典型云纹图

Figure 8. Typical moire pattern of 2# specimen

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图 9 加强口框和口盖载荷-应变曲线

Figure 9. Load-strain curves of reinforced opening frame and cover

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图 10 加筋壁板有限元模型

Figure 10. Finite element model of stiffened panel

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图 11 有限元法与试验载荷-位移曲线

Figure 11. Load-displacement curves by finite element method and test

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图 12 有限元法载荷-位移曲线

Figure 12. Load-displacement curves by finite element method

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图 13 有限元仿真结果

Figure 13. Finite element simulation results

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图 14 面外位移云图

Figure 14. Out-of-panel displacement contour

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表 1 带口盖钛合金加筋壁板剪切试验结果

Table 1. Test results of titanium alloy stiffened panel with cover under shear loading

kN
试件编号	屈曲载荷	后屈曲载荷	破坏载荷
1#	240	451	687
2#	220	447	685
平均值	230	449	686

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表 2 试验平均值与有限元法计算值比较

Table 2. Comparison of test average values and calculated values by finite element method

方法	屈曲载荷/kN	后屈曲载荷/kN	破坏载荷/kN
试验	230	449	686
有限元法	250	490	693
相对误差/%	8.7	9.1	1.02

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表 3 带口盖加筋壁板与开口加筋壁板对比

Table 3. Comparison of stiffened panel with cover and cutout stiffened panel

壁板	屈曲载荷/kN	后屈曲载荷/kN	破坏载荷/kN
带口盖加筋壁板	250	490	693
开口加筋壁板	220	340	505
下降比/%	12	30.6	27.1

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