Characterization of tensile damage progress in stitched CFRP laminates

Yoshimura, Akinori; Yashiro, Shigeki; Okabe, Tomonaga; Takeda, Nobuo

doi:10.1163/156855107781393740

Cited by 20 publications

(6 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This damage analysis was performed by a locally developed program in order to allow direct linkage to the optical analysis for the chirped FBG sensor. The validity of the simulation procedure was confirmed in another study (Yoshimura et al, 2006) which compared the simulated crack extension with the fracture mechanics.…”

Section: Damage Analysismentioning

confidence: 81%

Monitoring damage in holed CFRP laminates using embedded chirped FBG sensors

Yashiro

Okabe

Toyama

et al. 2007

International Journal of Solids and Structures

View full text Add to dashboard Cite

This study proposes a new approach to monitoring the damage process in holed CFRP laminates using an embedded chirped fiber Bragg grating (FBG) sensor. To this end, we experimentally and numerically investigated the damage process and the damage-induced changes in the spectrum shape. It was experimentally confirmed that multiple types of damage (e.g., splits, transverse cracks and delamination) appeared near a hole, and that the spectrum shape of the embedded chirped FBG sensor changed as the damage extended. Our proposed simulation for the reflection spectrum considering the damage agreed with the experiments. Furthermore, this study investigated the effect of each damage pattern on the changes in the spectrum shape. Finally, based on these discussions, we present simple damage identifications with the embedded chirped FBG for the holed CFRP laminates under completely unloaded conditions.

show abstract

Section: Damage Analysismentioning

confidence: 81%

Monitoring damage in holed CFRP laminates using embedded chirped FBG sensors

Yashiro

Okabe

Toyama

et al. 2007

International Journal of Solids and Structures

View full text Add to dashboard Cite

show abstract

“…Whether it is stitched or seamless, there is a possibility of delamination and crack expansion, which will eventually lead to failure. The results showed that the tensile properties of the stitched composites decreased under static load and fatigue conditions [7][8][9] [10]. However, different stitch densities can significantly improve tensile properties.…”

Section: Tensile Properties Of Common Stitched Compositesmentioning

confidence: 99%

“…At the same time, the study also found that adding stitches to composite materials can also improve their mechanical properties. Under the tension load perpendicular to the stitch direction, the stitch cannot improve the tensile properties of the material [14] [15]; under the condition that the tensile load is parallel to the stitch line, the stitch line can perform its due function, thereby improving Material properties and tensile properties. A study by Yasser Khalil Kilmasha et al The results showed a 17.1% increase in the tensile strength of the stitche specimen compared to the tensile mechanical test [16].…”

Section: Tensile Properties Of Common Stitched Compositesmentioning

confidence: 99%

A review on mechanical properties and simulation methods of stitched composites

Shi

Yongjie

2023

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

Stitching technology is an effective and advanced textile method to improve the interlayer performance of composites and has broad application prospects in aerospace, military, civil and other fields. In recent years, various aspects of sutured composites have been continuously updated. In this paper, the mechanical properties, failure mechanism and numerical simulation methods of stitched composites are introduced..

show abstract

“…Cohesive elements can eliminate the stress singularity around the crack tip, and express crack extension under the energy criterion. In the present study, we employed the bilinear relation between traction and separation that has been commonly used [21][22][23][24][25][26][27][28], as shown in Fig. 5b.…”

Section: Modified Cohesive Elementmentioning

confidence: 99%

“…For the purpose of this study, the cohesive zone model (CZM) was employed in the analysis. The CZM is a convenient modeling method that simulates interface and interlaminar failures [21][22][23][24][25][26][27][28]. In our previous study, we modified the CZM to simulate a mixedmode interfacial failure of single-fiber composite specimens under a static transverse loading condition [21].…”

Section: Introductionmentioning

confidence: 99%

A Numerical Simulation of Time-Dependent Interface Failure Under Shear and Compressive Loads in Single-Fiber Composites

et al. 2009

Self Cite

View full text Add to dashboard Cite

We performed a numerical simulation of a time-dependent interfacial failure accompanied by a fiber failure, and examined their evolution under shear and compressive loads in single-fiber composites. The compressive load on the interface consists of Poisson's contraction for matrix resin subjected to longitudinal tensile load. As time progresses, compressive stress at the interface in the fiber radial direction relaxes under the constant longitudinal tensile strain condition for the specimen, directly causing the relaxation of the interface frictional stress. This relaxation facilitates the failure of the interface. In this analysis, a specific criterion for interface failure is applied; apparent interfacial shear strength is enhanced by compressive stress, which is referred as quasiparabolic criterion in the present study. The results of the stress recovery profile around the fiber failure and the interfacial debonding length as a function of time simulated by the finite element analysis employing the criterion are very similar to experimental results obtained using micro-Raman spectroscopy.

show abstract

Characterization of tensile damage progress in stitched CFRP laminates

Cited by 20 publications

References 19 publications

Monitoring damage in holed CFRP laminates using embedded chirped FBG sensors

Monitoring damage in holed CFRP laminates using embedded chirped FBG sensors

A review on mechanical properties and simulation methods of stitched composites

A Numerical Simulation of Time-Dependent Interface Failure Under Shear and Compressive Loads in Single-Fiber Composites

Contact Info

Product

Resources

About