Composite material failure analysis
basic introduction
With the development of production and science and technology, more and more composite materials are widely used in our lives. Because composite materials have many advantages such as good thermal stability, high specific strength/specific stiffness, and good fatigue resistance, they are widely used in aerospace, automotive industry, manufacturing, medicine and other fields. However, the new requirements of technology and the high quality of products requirements, but customers have different understandings of high-demand products and processes, so failures such as composite material fractures, cracking, burst plate delamination, corrosion, etc. frequently occur, often causing liability disputes between suppliers and users, thus leading to serious economic losses. At present, more and more companies and units have a comprehensive understanding of composite material failure analysis, because through failure analysis methods, the root causes and mechanisms of product failure can be found, thereby improving product quality, process improvement, and liability arbitration. .
Service objects
Composite material manufacturers: Through failure analysis, find possible causes of product failure in the design, production, process, storage, transportation and other stages, and delve into the product failure mechanism to provide theoretical basis for improving product yield and optimizing production processes.
Distributors or agents: conduct timely and effective control over the quality of their incoming materials to provide a basis for fair definition of product quality responsibilities.
Complete machine users: follow up and provide suggestions for improving product technology and reliability to improve product yield and core competitiveness.
generate benefits
1) Through failure analysis, manufacturers and distributors can promptly understand the product status and provide effective prevention policies for product failure;
2) Provide product and process improvement opinions to improve product yield and product competitiveness;
3) Identify the party responsible for the failure of composite products and provide a basis for judicial arbitration.
Main failure modes (but not limited to)
Cracking, corrosion, panel delamination, open circuits (lines, holes), discoloration and failure, etc.
Commonly used failure analysis techniques
Non-destructive testing:
X-Ray fluoroscopy
Three-dimensional CT examination
C-SAM check

Material composition analysis:
Fourier transform infrared microspectroscopy (FTIR)
Confocal Raman Microscope (Raman)
Scanning electron microscopy and energy dispersive analysis (SEM/EDS)
X-ray fluorescence spectroscopy (XRF)
Gas Chromatography-Mass Spectrometry (GC-MS)
Fragmentation gas chromatography-mass spectrometry (PGC-MS)
Nuclear Magnetic Resonance Analysis (NMR)
Auger Electron Spectroscopy (AES)
X-ray photoelectron spectroscopy (XPS)
X-ray diffractometer (XRD)
Time-of-flight secondary ion mass spectrometry (TOF-SIMS)

Material thermal analysis:
Differential Scanning Calorimetry (DSC)
Thermogravimetric Analysis (TGA)
Thermomechanical Analysis (TMA)
Dynamic Thermomechanical Analysis (DMA)

Material electrical properties:
Breakdown voltage, withstand voltage, dielectric constant, electromigration, etc.

Destructive testing:
Dyeing and Penetrant Testing
Section analysis: metallographic sectioning, focused ion beam (FIB) sample preparation, ion grinding (CP) sample preparation.

Material physical property testing:
Tensile strength, bending strength, etc.