Laser Cutting, Drilling and Piercing

Steen, W. M.; Mazumder, J.

doi:10.1007/978-1-84996-062-5_4

Cited by 10 publications

(5 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This makes Si-NCs, in principle, an excellent candidate for their integration into existing technologies at low cost and with no environmental risk. For these reasons, Si-NCs have been researched widely and have been considered a prime candidate for photovoltaics, bioimaging, novel catalyst designs, and novel types of light-emitting diodes/lasers. − Also, the use of laser-based technologies for processing Si-NCs offers good opportunities as such processes are well-established within manufacturing and their impact on the environment is relatively low . Laser ablation of solid bulk targets in vacuum and/or in liquid solutions has been widely reported, including for the synthesis of Si-NCs. − In particular, laser processes carried out in liquid media (e.g., water) greatly simplify dust and nanoparticulate management, avoiding potential airborne pollution and limiting potential health risks. − …”

Section: Introductionmentioning

confidence: 99%

Environmentally Friendly Processing Technology for Engineering Silicon Nanocrystals in Water with Laser Pulses

et al. 2016

View full text Add to dashboard Cite

Herein, we demonstrate the customized, environmentally friendly tailoring of nanoparticles and their surface chemistry by short pulsed laser irradiation in liquids. This process allows for the formation of crystalline spherical particles exceeding several hundreds of nanometers in water from colloids of electrochemically etched silicon nanocrystals (Si-NCs), which exhibit quantum confinement effects and room-temperature stable luminescence. In particular, nanosecond (ns) pulsed laser irradiation of the Si-NC/water colloids causes the selective heating of the Si-NCs accompanied by the formation of spherical particles. In contrast, femtosecond (fs) laser pulsed irradiation induces the formation of colloidal Si-NCs with peculiar surface chemistry; in particular, fs pulses generate short-lived plasmas with more ionized species in water, which enable the surface engineering of quantum confined Si-NCs, thus limiting Si-NC agglomeration and enhancing their photoluminescent properties.

show abstract

Section: Introductionmentioning

confidence: 99%

Environmentally Friendly Processing Technology for Engineering Silicon Nanocrystals in Water with Laser Pulses

et al. 2016

View full text Add to dashboard Cite

show abstract

“…A theoretical scheme based on a mode-locking process for nanosecond pulses with comb spectra to obtain high enhancement factors in a high-Q resonator has been reported [3]. In addition, square wave pulse is more suitable for high-power applications such as inertial confinement fusion (ICF) [4], inverse Compton scattering (ICS) source [5] and laser material processing [6] than ordinary pulse because of its flat-top characteristics. Hence, the square wave pulses of the comb spectrum are combined with these advantages, thus potentially providing megawatt solutions for SSMB.…”

Section: Introductionmentioning

confidence: 99%

Coherent square pulse generation based on continuous wave phase modulation for SSMB

Yang,

Pan,

Zhang

et al. 2023

3rd International Conference on Laser, Optics, and Optoelectronic Technology (LOPET 2023)

View full text Add to dashboard Cite

Laser square wave pulse plays an important role in the application of high power optical field. In this work, the modulation phase signal corresponding to the square wave pulse is inversely solved by the method of numerical calculation. And a modified modulation method is proposed, which can generate the coherent square pulse train with constant frequency interval in the frequency domain. It has the potential to provide a solution for the application requirements of high power optical field. In addition, the error analysis of the delay time in the double modulation model is carried out, and the influence of different time delay on the generated square wave pulse deformation is considered qualitatively and quantitatively in one cycle, which provides a theoretical basis and feasibility analysis for the experiment implementation.

show abstract

“…In addition, both mechanical and water-jet cutting apply forces to the work piece and can cause delamination, making it difficult to machine thin CFRP parts [ 2 ]. In comparison, laser-based machining has emerged as a promising alternative, offering flexibility in use and operation without contact, making it practically wear-free [ 3 ]. Nevertheless, certain challenges need to be addressed for industrial applications.…”

Section: Introductionmentioning

confidence: 99%

Finite Element Simulation and Experimental Assessment of Laser Cutting Unidirectional CFRP at Cutting Angles of 45° and 90°

Keuntje,

Mrzljak,

Gerdes

et al. 2023

Polymers

View full text Add to dashboard Cite

Laser cutting of carbon fibre-reinforced plastics (CFRP) is a promising alternative to traditional manufacturing methods due to its non-contact nature and high automation potential. To establish the process for an industrial application, it is necessary to predict the temperature fields arising as a result of the laser energy input. Elevated temperatures during the cutting process can lead to damage in the composite’s matrix material, resulting in local changes in the structural properties and reduced material strength. To address this, a three-dimensional finite element model is developed to predict the temporal and spatial temperature evolution during laser cutting. Experimental values are compared with simulated temperatures, and the cutting kerf geometry is examined. Experiments are conducted at 45° and 90° cutting angles relative to the main fibre orientation using a 1.1 mm thick epoxy-based laminate. The simulation accurately captures the overall temperature field expansion caused by multiple laser beam passes over the workpiece. The influence of fibre orientation is evident, with deviations in specific temperature data indicating differences between the estimated and real material properties. The model tends to overestimate the ablation rate in the kerf geometry, attributed to mesh resolution limitations. Within the parameters investigated, hardly any expansion of a heat affected zone (HAZ) is visible, which is confirmed by the simulation results.

show abstract

Laser Cutting, Drilling and Piercing

Cited by 10 publications

References 35 publications

Environmentally Friendly Processing Technology for Engineering Silicon Nanocrystals in Water with Laser Pulses

Environmentally Friendly Processing Technology for Engineering Silicon Nanocrystals in Water with Laser Pulses

Coherent square pulse generation based on continuous wave phase modulation for SSMB

Finite Element Simulation and Experimental Assessment of Laser Cutting Unidirectional CFRP at Cutting Angles of 45° and 90°

Contact Info

Product

Resources

About