Faculty Mentor Name

Wahyu Lestari

Format Preference

Poster

Abstract

The increasing use of carbon fiber-reinforced polymer (CFRP) in the aerospace industry requires a better understanding of its damage properties. Many modern aircraft under high loads are utilizing this material for their primary structures due to its high strength to weight ratio. However, CFRPs are sensitive to out-of-plane loading such as low-velocity impact and indentation. These damages can reduce the compressive strength significantly without leaving a visible mark on the surface, which is known as Barely Visible Impact Damage (BVID). The behavior and residual strength of CFRPs after impact damage under compressive loading are still not fully understood. Studies of Compression After Impact (CAI) tests are still very few. The purpose of this research is to use Digital Image Correlation (DIC) to study the failure mechanism and better understand the shear properties of CFRP after impact. To account for variety of CFRP structures and to study the trend in the damages, a series of CAI and shear tests with different impact levels will be performed. The strain values from the DIC method will be validated by conventional measurement using strain gauges that will be collected concurrently. The DIC will capture damage propagation and local behavior of the material under compressive and shear loading. Based on the test results, damage sequence and damage mechanism of different composite layups and damaged will be analyzed.

  • POSTER PRESENTATION
  • ARIZONA SPACE GRANT AWARD

Share

COinS
 

Experimental Study on Compression and Shear Strength of CFRP

The increasing use of carbon fiber-reinforced polymer (CFRP) in the aerospace industry requires a better understanding of its damage properties. Many modern aircraft under high loads are utilizing this material for their primary structures due to its high strength to weight ratio. However, CFRPs are sensitive to out-of-plane loading such as low-velocity impact and indentation. These damages can reduce the compressive strength significantly without leaving a visible mark on the surface, which is known as Barely Visible Impact Damage (BVID). The behavior and residual strength of CFRPs after impact damage under compressive loading are still not fully understood. Studies of Compression After Impact (CAI) tests are still very few. The purpose of this research is to use Digital Image Correlation (DIC) to study the failure mechanism and better understand the shear properties of CFRP after impact. To account for variety of CFRP structures and to study the trend in the damages, a series of CAI and shear tests with different impact levels will be performed. The strain values from the DIC method will be validated by conventional measurement using strain gauges that will be collected concurrently. The DIC will capture damage propagation and local behavior of the material under compressive and shear loading. Based on the test results, damage sequence and damage mechanism of different composite layups and damaged will be analyzed.

  • POSTER PRESENTATION
  • ARIZONA SPACE GRANT AWARD