Professional failure analysis organization for common failure modes of composite materials

Date：2023-06-08 16:18:28Views：374

In order to effectively extend the service life of composite materials, it is necessary to analyze and handle the failure of composite materials. The failure modes of composite materials are relatively complex, and common failure modes include ductile failure, creep failure, and stable failure. The following will introduce the characteristics and applications of these three failure modes.

Ductile failure

Ductile failure refers to the elastic deformation of a composite material under external force, and when the external force is removed, the material cannot return to its original state. This failure mode typically occurs during the initial use of composite materials. Ductility failure is caused by the destruction of the internal organizational structure of composite materials. When composite materials are subjected to external forces, the internal organizational structure of the material will change, leading to the loss of elasticity of the material.

Ductile failure is common in the application of composite materials, especially in the aerospace field. For example, the wings and fuselage of aircraft are susceptible to external forces, leading to ductile failure of composite materials.

To reduce the risk of ductile failure of composite materials, the following measures can be taken:

(1) Improve the mechanical properties of composite materials, such as increasing their strength and stiffness.

(2) Adopting advanced composite material manufacturing processes, such as controlling the internal structure and uniformity of the material.

(3) Add specific materials, such as reinforcing agents and catalysts, to composite materials to improve their ductility performance.

Creep failure

Creep failure refers to the physical and mechanical properties of composite materials that change due to external factors during long-term use, resulting in the loss of their original properties. This failure mode typically occurs during the long-term use of composite materials.

Creep failure is caused by changes in the internal structure of composite materials. When the composite is affected by external factors, such as temperature, humidity and pressure, the molecular structure of the material will change, resulting in changes in the mechanical properties of the material.

In the application of composite materials, creep failure usually occurs in applications that require long-term durability, such as marine engineering, shipbuilding, and transportation. To reduce the risk of creep failure of composite materials, the following measures can be taken:

(1) Improve the mechanical properties of composite materials, such as increasing their strength and stiffness.

(2) Adopting advanced composite material manufacturing processes, such as controlling the internal structure and uniformity of the material.

(3) Add specific materials, such as reinforcing agents and catalysts, to composite materials to improve their creep performance.

Stable failure

Stable failure refers to the irreversible deformation of composite materials under external forces, resulting in the loss of their original properties. This failure mode typically occurs during the long-term use of composite materials.

Stable failure is caused by the destruction and destruction of the internal organizational structure of composite materials. When a composite material is subjected to external forces, the internal organizational structure of the material will change, leading to deformation of the material. After the external forces are removed, the material cannot return to its original state.

Stable failure is common in the application of composite materials, especially in fields such as aerospace and automotive manufacturing. For example, structural components of airplanes and car bodies are susceptible to external forces, leading to stable failure of composite materials.

To reduce the risk of stable failure of composite materials, the following measures can be taken:

(1) Improve the mechanical properties of composite materials, such as increasing their strength and stiffness.

(2) Adopting advanced composite material manufacturing processes, such as controlling the internal structure and uniformity of the material.

(3) Add specific materials, such as reinforcing agents and catalysts, to composite materials to improve their strength and stiffness.

For the failure modes of these composites, professional organizations have proposed a variety of failure analysis methods and means, including appearance analysis, thermal analysis, mechanical testing and structural analysis. For example, observing the surface microstructure of materials through a microscope, analyzing material pores, cracks, mechanical and chemical properties, and identifying the root cause of material failure. At the same time, professional failure analysis institutions must have scientific qualification certification and technical strength, such as ISO certification, A2LA certification, CNAS accreditation, etc., to provide efficient and accurate failure analysis services for enterprises.

In the era of rapid development of composite materials, professional failure analysis institutions can provide enterprises with in-depth information about material failure, thus improving quality and performance, and achieving the goal of better using composite materials. So that's all for today's content sharing. If you find it helpful, please follow Chuangxin Testing. We will provide you with more industry information!