The Analysis and Calculation of Shock Track during Laser Shock Forming

2006 ◽  
Vol 315-316 ◽  
pp. 339-343
Author(s):  
Su Min Yin ◽  
C. Jin ◽  
Yong Kang Zhang ◽  
Jian Zhong Zhou ◽  
Ji Chang Yang
Keyword(s):  
New Method ◽  
Large Region ◽  
Laser Shock ◽  
Stl Model ◽  
Laser Shock Forming

In terms of the principle and characteristics, this paper proposes a new method to implement laser shock forming for large region based on the STL model. The method allows the build-up of laser shocking track to be accomplished automatically and therefore resolves the problem of continuous machining in course of the laser shock.

Theoretical Analysis of Laser Shock Bulging Forming

2012 ◽  
Vol 472-475 ◽  
pp. 2480-2483 ◽  
Author(s):  
Guo Fang Zhang ◽  
Zhong Ji ◽  
Jing Liu ◽  
Chao Zheng ◽  
Jian Hua Zhang
Keyword(s):  
High Pressure ◽  
Theoretical Analysis ◽  
Analytical Model ◽  
Pulse Energy ◽  
Shock Pressure ◽  
Laser Shock ◽  
Plastic Response ◽  
Forming Process ◽  
Laser Shock Forming ◽  
Plastic Forming

Laser shock forming (LSF) is a novel plastic forming process which utilizes high-pressure plasma to deform thin metals to 3D configurations. The plastic response of a circular plate in laser shock bulging forming was theoretically studied. A simplified shock pressure model was established and then an analytical model was proposed to calculate the deflection. The results show that the deflection increases with increasing pulse energy and the deformation profiles calculated by the analytical model agree well with those of experiment.

Research on the Finite Element Simulation of the Laser Shock Forming of TC4 Titanium Alloy

2016 ◽  
Vol 693 ◽  
pp. 1121-1128 ◽  
Author(s):  
Guo He Li ◽  
David Mbukwa ◽  
Wei Zhao
Keyword(s):  
Finite Element ◽  
Sheet Metal ◽  
Laser Energy ◽  
Sheet Thickness ◽  
High Amplitude ◽  
Laser Spot ◽  
Laser Shock ◽  
Forming Process ◽  
Element Analysis ◽  
Laser Shock Forming

laser shock forming, which combines the metal forming and material modification, is a non-mode, flexible forming new technology using laser-induced force effect of high amplitude shock waves to obtain the plastic deformation of sheet metal. in this paper, the simulation of laser shock forming process of tc4 sheet metal was carried out through the commercial finite element analysis software abaqus. the influence of the sheet thickness, laser energy, constraints aperture and laser spot spacing on the sheet metal deformation are investigated. the results show that: with the increase of sheet thickness, the deformation range of sheet decreases, and the amplitude of deformation decreases firstly and then increases. the deformation increases linearly with the increase of laser energy. the larger boundary constraint aperture leads to the larger deformation of sheet metal. there are no obvious influence on the forming accuracy when an opposite laser spot spacing is adopted. therefore, under the condition of meeting the accuracy requirement, for improving the efficiency, adopting a certain laser spot spacing to finish the forming should be considered.

Joining similar and dissimilar material combinations by laser shock forming

2020 ◽  
Vol 60 ◽  
pp. 318-327
Author(s):  
Xiangying Wang ◽  
Zhong Ji ◽  
Chao Zheng ◽  
Ren Liu
Keyword(s):  
Dissimilar Material ◽  
Laser Shock ◽  
Laser Shock Forming

Joining by laser shock forming: realization and acting pressures

2013 ◽  
Vol 8 (3) ◽  
pp. 283-290 ◽  
Author(s):  
Stefan Veenaas ◽  
Hanna Wielage ◽  
Frank Vollertsen
Keyword(s):  
Laser Shock ◽  
Laser Shock Forming

Numerical and experimental investigations of laser shock forming aluminum alloy sheet with mold

2016 ◽  
Vol 11 (1) ◽  
pp. 101-112 ◽  
Author(s):  
Xingquan Zhang ◽  
Yan Zhang ◽  
Yiwei Zhang ◽  
Shanbao Pei ◽  
Zhilai Huang ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Alloy Sheet ◽  
Experimental Investigations ◽  
Laser Shock ◽  
Aluminum Alloy Sheet ◽  
Laser Shock Forming

Investigation of Copper Foil Thinning Behavior by Flexible-Pad Laser Shock Forming

2013 ◽  
Vol 535-536 ◽  
pp. 306-309 ◽  
Author(s):  
Balasubramanian Nagarajan ◽  
Sylvie Castagne ◽  
Zhong Ke Wang
Keyword(s):  
Cross Section ◽  
Laser Fluence ◽  
Copper Foil ◽  
Thickness Distribution ◽  
Process Variable ◽  
Laser Shock ◽  
Compressive Stresses ◽  
Laser Shock Forming ◽  
The Cross ◽  
Metallic Foils

This paper reports on a novel microforming technique, Flexible-Pad Laser Shock Forming (FPLSF) which uses laser-induced shock waves and a flexible pad to induce plastic deformation on metallic foils. Thickness distribution at the cross-section of the craters formed by FPLSF is analyzed experimentally with respect to laser fluence, which is a significant process variable that controls the deformation pressure. Furthermore, hardness of the deformed samples at the cross-section is measured by nanoindentation testing. It is found that the thinning of copper foil by FPLSF ranges from 7% to 25% for laser fluence ranging between 7.3 J/cm2 and 20.9 J/cm2. Thinning is maximum at the crater center, which can be attributed to the maximum compressive stresses in the thickness direction, and minimum at the edge portions. With increase in laser fluence, thinning of the foil increases whereas minimum change in hardness is observed. The variation in thinning across different crater locations ranges between 6% and 8% only, which indicates that FDLSF can be developed as a competitive technique to produce components with uniform thickness distribution.

Micro scale laser shock forming of pure copper and titanium sheet with forming/blanking compound die

2015 ◽  
Vol 67 ◽  
pp. 83-93 ◽  
Author(s):  
Xiao Wang ◽  
Di Zhang ◽  
Chunxing Gu ◽  
Zongbao Shen ◽  
Youjuan Ma ◽  
...  
Keyword(s):  
Pure Copper ◽  
Laser Shock ◽  
Titanium Sheet ◽  
Micro Scale ◽  
Laser Shock Forming

scholarly journals Improving Mechanical Property and Microstucture Evolution of 7075 Aluminum Panel Formed by Unequal Alternate Double-sided Laser Shock Forming

2021 ◽  
Author(s):  
Yuqi Yang ◽  
Hongchao Qiao ◽  
Ying Lu ◽  
Jibin Zhao ◽  
boyu sun ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Mechanical Property ◽  
Grain Refinement ◽  
High Strain ◽  
Weight Ratio ◽  
Strengthening Mechanism ◽  
Dislocation Slip ◽  
Laser Shock ◽  
Laser Shock Forming ◽  
Laser Shock Wave

Abstract With thrust weight ratio increasing, integral panel is an important component to reduce the aircraft weight, and it is a great challenges to ensure the forming accuracy and mechanical property in the lager-scale panel. Laser shock forming has a great development prospect in achieving integral panel forming and improving its mechanical properties. This work investigated unequal alternate double-sided laser shock forming, which can make 7075 aluminum panel form and induce harden layer in both panel sides. The improvement in mechanical properties and microstucture evolution of 7074 aluminum panel were analyzed after unequal alternate double-sided laser shock forming. The residual stress and microhardness in surface and subsurface were verified to be enhanced by the laser shock wave. The results of XRD and EBSD provided an evidence of grain refinement. The strengthening mechanism of unequal alternate double-sided laser shock forming was analyzed in this work. The grains are distorted and refined during high strain rate plastic deformation due to dislocation slip and accumulation. The mechanical properties were enhanced by unequal alternate double-sided laser shock forming for harden layers in both panel sides. The harden layers and grain refinement has a great significance in inhibiting the crack generation and growth.

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