Thermoplastic composites have important applications in medical, electronics, automotive, and aerospace industries due to their good mechanical properties, easy for processing, recyclability, and low cost. In this work, the mechanical failure behavior of short carbon fiber reinforced PEEK composites is studied systemically using experimental technologies of quasi-static tests and dynamic Hopkinson bar tests. The experimental characterization covers different loading rate from 0.001 s to 1,000 s and temperature ranges from -30°C to 100°C, which provides detailed illustration for the effects of strain rate and temperature on the mechanical failure of short carbon fiber reinforced PEEK composites. The experimental results provide fundamental understandings on the failure mechanism of this material, especially in identifying the main factors affecting the rate-dependent and temperature-dependent behavior, which can facilitate the material design and model development. Based on the experimental data, this paper proposes an improved phenomenological constitutive model to describe the constitutive behavior of PEEK composites under different strain rates and different temperatures conditions.

Access the Conference Proceedings Paper on ASCE Library 

Thermoplastic composites have important applications in medical, electronics, automotive, and aerospace industries due to their good mechanical properties, easy for processing, recyclability, and low cost. In this work, the mechanical failure behavior of short carbon fiber reinforced PEEK composites is studied systemically using experimental technologies of quasi-static tests and dynamic Hopkinson bar tests. The experimental characterization covers different loading rate from 0.001 s to 1,000 s and temperature ranges from -30°C to 100°C, which provides detailed illustration for the effects of strain rate and temperature on the mechanical failure of short carbon fiber reinforced PEEK composites. The experimental results provide fundamental understandings on the failure mechanism of this material, especially in identifying the main factors affecting the rate-dependent and temperature-dependent behavior, which can facilitate the material design and model development. Based on the experimental data, this paper proposes an improved phenomenological constitutive model to describe the constitutive behavior of PEEK composites under different strain rates and different temperatures conditions.

**[Access the Conference Proceedings Paper on ASCE Library](https://doi.org/10.1061/9780784483381.023)** 

Characterization and Constitutive Model for Temperature and Strain-Rate Dependent Tensile Behavior of Short Carbon Fiber Reinforced PEEK Composites

This conference brought the experience and knowledge of experts in the aerospace industry together to share and discuss the latest research and engineering techniques that effect the exploration and settlement of space. Presentations were made in multiple concurrent symposia over three days. Topics included: Granular materials in space exploration, exploration in utilization of extra-terrestrial bodies, advanced materials and designs for aerospace and terrestrial structures under extreme environment, structures in challenging environments, and space engineering, construction, and architecture for the moon, Mars, and beyond.

Due to challenges with COVID-19, this 17th Biennial was moved to April 2021 and was offered in a virtual format.

[Paper Proceedings] (https://ascelibrary.org/doi/book/10.1061/earthandspace2021)