English

Shanghai Optical Machinery Institute has made progress in laser assisted connection of metal carbon fiber composite heterojunction materials

95
2023-09-01 14:28:48
See translation

Recently, the research team of Yang Shanglu from the Laser Intelligent Manufacturing Technology R&D Center of the Chinese Academy of Sciences Shanghai Institute of Optics and Fine Mechanics has made new progress in the laser assisted connection of metal carbon fiber composite heterostructure joints.

The team used an adjustable flat top rectangular semiconductor laser as a heat source to achieve the connection between high-strength steel and thermoplastic resin based carbon fiber composite materials. The relationship between the interface thermal history, interface forming mechanism, and joint performance of different materials was elucidated, and a new laser heat input process strategy was proposed.

The relevant research results are published in Composite Structures under the title of "Effect of international thermal history on bonding mechanism of laser assisted joint of QP980-FRTP with adjustable flat top rectangular laser beam".

Developing high-performance multi material hybrid structures is a development trend in the aerospace field. Carbon fiber reinforced thermoplastic composites have ultra-high specific strength and toughness, and can be mixed with metals to meet the requirements of structural lightweight and cost control. There are significant differences in physical and chemical properties between metals and composite materials, and existing methods for connecting dissimilar materials have shortcomings. It is urgent to develop high-quality and efficient new connection processes.

Figure 1. Laser assisted connection process, ultra fast laser surface treatment structure, and interface thermal history monitoring
The team studied the interface thermal history during laser assisted bonding, analyzed the temperature state of the resin matrix and its wetting behavior on the metal surface, and compared the effects of different interface thermal histories on interface bonding defects, chemical composition, joint strength, and failure behavior. By using the interface thermal history design method and laser thermal input process control, the ultimate interface temperature and sufficient insulation time have been achieved, which helps the complete melting and diffusion of the resin matrix on the metal surface, fills the micropores at the interface, promotes chemical bonding, and produces high-quality joints with peak loads above 10kN and shear strengths above 22MPa. The relevant research results have broad application prospects in aerospace and other related fields.

Figure 2. Relationship between interfacial thermal history and resin wetting behavior on metal surfaces

Source: Laser Manufacturing Network

Related Recommendations
  • Bodor Laser has been approved by Shandong Engineering Research Center

    Recently, the Development and Reform Commission of Shandong Province announced the list of Shandong Engineering Research Centers for 2024. bodor Laser has been recognized as the "Advanced Laser High end Intelligent Manufacturing and Application Shandong Engineering Research Center" and is the only enterprise in the laser intelligent manufacturing industry to be listed.As an important component of ...

    2024-07-17
    See translation
  • The LANL Laboratory in the United States has achieved a light source that generates a circularly polarized single photon stream using a quantum light emitter

    Los Alamos National Laboratory (LANL) has developed a method for a quantum light emitter that stacks two different atomically thin materials together to achieve a light source that produces a stream of circularly polarized single photons. These light sources can in turn be used for a variety of quantum information and communication applications.According to Los Alamos researcher Han Htoon, the wor...

    2023-09-02
    See translation
  • 20 million dollars! Undersea fiber optic agreement reached, fully operational by 2026

    Recently, Confluence Networks LLC has announced a long-term partnership agreement with Laser Light Communications Inc., a developer and provider of software controlled optical network services.According to the agreement, Laser Light will adopt Confluence-1 submarine fiber optic network, which Confluence Networks is about to launch, as the core part of its global network. The protocol will last for...

    2024-05-24
    See translation
  • A new method for generating controllable optical pulse pairs using a single fiber laser

    Researchers from Bayreuth University and Konstanz University are developing new methods to control ultra short laser emission using soliton physics and two pulse combs in a single laser. This method has the potential to greatly accelerate and simplify laser applications.Traditionally, the pulse interval of lasers is set by dividing each pulse into two pulses and delaying them at different, mechani...

    2024-01-15
    See translation
  • Assisting Gas Mixing to Promote the Development of Fiber Laser Technology

    Just ten years ago, fiber laser cutting machines were considered experts in thin plates. The stores quickly realized that they had to invest in them to compete, at least by reducing their instrument materials. For high-quality sheet metal cutting, CO2 laser is still the way to go. Of course, fiber lasers can cut thicker blanks, but the quality is not very good, and their speed advantage almost dis...

    2024-01-11
    See translation