Methods and means for failure analysis of composite materials

Date：2023-06-01 16:45:49 Views：610

Composite materials are materials formed by the organic combination of two or more materials with different properties, and their combined performance exceeds the single performance of the raw material. It is widely used in fields such as aerospace, automotive manufacturing, shipbuilding, sports goods, and architecture. In order to better extend the service life of composite materials, it is necessary to analyze and handle the failure of composite materials. This article will introduce the methods and means of composite material failure analysis.

1、 Causes of composite material failure

The failure of composite materials is often caused by the combined action of multiple factors. Generally speaking, the failure of composite materials can be divided into the following types:

Fatigue failure: Fatigue failure is one of the most common types of failure in composite materials. Due to the structure and material characteristics of composite materials, they are susceptible to fatigue factors. During long-term use, composite materials may be subjected to external pressure and vibration, leading to material fatigue damage.

Thermal failure: Thermal failure is another common type of failure in composite materials. In high-temperature environments, the performance of composite materials can be greatly affected. If the high-temperature resistance of composite materials is insufficient, it can easily lead to thermal failure.

Corrosion failure: Corrosion failure is caused by the corrosive effect of the environment on the composite material. In marine, chemical, metallurgical and other environments, composite materials are susceptible to corrosion factors.

Environmental failure: Environmental failure refers to the failure of composite materials caused by external environmental effects. For example, carbon monoxide and nitrogen oxides contained in car exhaust can react chemically with the coating on the surface of composite materials, leading to coating detachment and damage.

2、 Failure Analysis Method for Composite Materials

In order to effectively extend the service life of composite materials, it is necessary to analyze and handle the failure of composite materials. Below are several common failure analysis methods for composite materials:

Macro analysis: Macro analysis refers to the surface observation and analysis of composite materials through visual observation or photography. Macroscopic analysis can preliminarily determine the failure types and causes of composite materials, providing a basis for further analysis.

Micro analysis: Micro analysis refers to the analysis of composite materials by slicing or slicing through physical or chemical methods. Through microscopic analysis, the failure causes and properties of composite materials can be further understood, providing a basis for maintenance and replacement.

Spectral analysis: Spectral analysis is a method that can quickly and accurately analyze the composition of composite materials. Spectral analysis can determine the content of different elements and compounds in composite materials, thereby determining the cause of failure of the composite material.

3、 Treatment Methods for Composite Material Failure

Repair processing: Repair processing refers to repairing or replacing composite materials to restore their functional use. For the occurrence of fatigue cracks, thermal failure, corrosion, etc., welding, filling, coating, and other methods can be used for treatment.

Replacement treatment: If the composite material is severely damaged or fails, a new composite material can be used to solve the problem. When replacing, it is necessary to pay attention to selecting materials with the same material and structure as the original components to ensure that the performance after replacement meets the requirements.

In summary, failure analysis of composite materials is an important step in extending the service life of composite materials and a key means to ensure product quality. Our company has a team of professional engineers and industry elites, with three standardized laboratories covering an area of over 1800 square meters. We can undertake various testing projects such as electronic component testing and verification, IC authenticity identification, product design and material selection, failure analysis, functional testing, factory incoming material inspection, and tape weaving.