Cryogenic Compression Properties and Failure Mechanism of Lightweight 3D MWK Carbon Fabric Reinforced Epoxy Composites

Li, Dian‐sen; Duan, Haohong; Jiang, Lei

doi:10.1007/s12221-019-8639-z

Cited by 6 publications

(1 citation statement)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Many authors have presented the effects of cryogenic temperature on the mechanical response of composites and have reported contradictory results for different materials, indicating that multiple mechanisms are active synchronously [5]. In cryogenic conditions, matrix material manifests a more brittle behavior which is caused by the reduction in polymer chain mobility [6]. Additionally, thermal residual stresses derived from the difference of thermal contractions between fibers and matrix as well as between adjacent plies would generate micro-cracking in the matrix and result in the softening effect [7].…”

Section: Introductionmentioning

confidence: 99%

Study on the effect of environmental exposure on tensile behavior of tapered composite structure

Cao,

Bao,

Chen

et al. 2024

International Conference on Optoelectronic Information and Functional Materials (OIFM 2024)

View full text Add to dashboard Cite

Composite structures used in aircraft need to deal with a wide variety of climatic conditions, such as high temperature, cold temperature, and hydrothermal environment, which probably affects their bearing capability and life expectancy. Additionally, tapered composite laminates are commonly adopted to accommodate the need for varying thicknesses in aircraft structures. Consequently, environmental influence on the tapered composite structures has become a major concern in the utilization of composites. In this work, an experimental program is executed on the tapered composite structures in room temperature atmosphere (RTA), cold temperature dry (CTD), and elevated temperature wet (ETW) conditions separately. The results indicate that the large stress concentration induced by the presence of discontinuous plies in the tapered section motivates the occurrence of delamination at a relatively low load. Environmental exposure does not have a distinct effect on the delamination initiation load. In the hydrothermal environment, the degradation of tensile strength is negligible, and the delamination process as well as the failure pattern of ETW specimens are similar to RTA ones. However, cryogenic conditions result in a severely deteriorating effect on the tensile strength. The failure pattern of CTD specimens exhibits a brittle fracture characteristic and no obvious yield process is observed.

show abstract

Section: Introductionmentioning

confidence: 99%