Fracture toughness for longitudinal compression failure of laminated composites at high loading rate

He, Rui; Gao, Yidi; Cheng, Longfei; Cui, Hao; Li, Yu Long

doi:10.1016/j.compositesa.2022.106834

Cited by 18 publications

(4 citation statements)

References 27 publications

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“…Data collection during the experiments was carried out using a force sensor and a built-in displacement sensor. The indenter velocity for the SENB tests was set to 3 mm/min [ 30 ], and for the CC tests, it was set to 0.5 mm/min [ 23 ].…”

Section: Tensile and Compressive Fracture Toughness Testsmentioning

confidence: 99%

“…Ortega et al [ 22 ] experimentally investigated the tensile and compressive fracture toughness of composite laminates using the compact tension and compression methods. He et al [ 23 ] conducted compact compression experiments on carbon fiber, analyzing the displacement and strain field using the J-integral method to obtain the energy dissipation under different loading rates. The numerical value of the fracture toughness was indirectly obtained through the J-integral method.…”

Section: Introductionmentioning

confidence: 99%

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Experimental Study on the Fracture Toughness of Bamboo Scrimber

Zhang

Hou

et al. 2023

Materials

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In the past decade, bamboo scrimber has developed rapidly in the field of building materials due to its excellent mechanical properties, such as high toughness and high tensile strength. However, when the applied stress exceeds the ultimate strength limit of bamboo scrimber, cracks occur, which affects the performance of bamboo scrimber in structural applications. Due to the propensity of cracks to propagate, it reduces the load-bearing capacity of the bamboo scrimber material. Therefore, research on the fracture toughness of bamboo scrimber contributes to determining the material’s load-bearing capacity and failure mechanisms, enabling its widespread application in engineering failure analysis. The fracture toughness of bamboo scrimber was studied via the single-edge notched beam (SENB) experiment and compact compression (CC) method. Nine groups of longitudinal and transverse samples were selected for experimental investigation. The fracture toughness of longitudinal bamboo scrimber under tensile and compressive loadings was 3.59 MPa·m1/2 and 2.39 MPa·m1/2, respectively. In addition, the fracture toughness of transverse bamboo scrimber under tensile and compressive conditions was 0.38 MPa·m1/2 and 1.79 MPa·m1/2, respectively. The results show that, for this material, there was a significant distinction between longitudinal and transverse. Subsequently, three-point bending tests and simulations were studied. The results show that the failure mode and the force–displacement curve of the numerical simulation were highly consistent compared with the experimental results. It could verify the correctness of the test parameters. Finally, the flexural strength of bamboo scrimber was calculated to be as high as 143.16 MPa. This paper provides data accumulation for the numerical simulation of bamboo scrimber, which can further promote the development of bamboo scrimber parameters in all aspects of the application.

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Section: Tensile and Compressive Fracture Toughness Testsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Fracture Toughness of Bamboo Scrimber

Zhang

Hou

et al. 2023

Materials

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“…Also, the J-integral and R-curves were applied to determine the fracture toughness and the energy dissipation of composites subjected to combined shear and compression stresses. 25 This study characterizes the effect of inserting ABS polymer and 1, 3, 5, and 7 wt. % nanoclay on the structural characteristics of the pure HDPE, the binary HDPE 90 /LDPE-g-MA 10 and the ternary HDPE 90 /LDPE-g-MA 10 /ABS 10 blends.…”

Section: Introductionmentioning

confidence: 99%

Structural and nonlinear J-integral fracture toughness for nanoclay toughened ternary HDPE/LDPE-g-MA/ABS blend nanocomposites

Albdiry

2024

Journal of Composite Materials

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High-density polyethylene (HDPE) has a higher strength-to-density ratio and stiffness but a low branching degree for the packed linear chains that restrict the ability to bond and resist cracking. This study conducts the role of inserting rigid nanoclay (NC) and soft acrylonitrile butadiene styrene (ABS) on the structural, nonlinear fracture toughness and crack resistance of a ternary HDPE/low-density polyethylene-grafted maleic anhydrite (LDPE-g-MA)/ABS blend. Varying additions of 1, 3, 5, and 7 % NC and 5, 10, 15 wt. % ABS were inserted into neat HDPE and HDPE90/LDPE-g-MA10. All materials were hand-mixed before feeding into a single screw extruder and directly melt-blended twice to achieve a good dispersion of nanofiller in the matrix. The structural characteristics and the fracture surfaces of NC/HDPE/LDPE-g-MA and NC/HDPE/LDPE-g-MA/ABS were investigated by TEM, XRD, SEM, and FTIR spectra. Tensile strength and the critical dissipated energy (JIc) determined by quasi-static J-integral fracture mechanic revealed a higher absorbing fracture energy of 75 KJ/m2 for the binary and 85 KJ/m2 for the ternary nanocomposites. The synergistic percolated role of the NC particles and ABS copolymer in front of the crack tip region hinders crack growth for the presence of micro-void coalescence and massive shear-yielding toughening mechanisms.

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“…Although the quasi-static response of syntactic foam has been widely reported, studies on the mechanical response at high strain rates are required for the analysis of impact events [22][23][24][25]. Li et al [26] reported the flow and failure of an epoxy syntactic foam (ESF) from quasi-static to high strain rates using the split Hopkinson pressure bar (SHPB) [27][28][29][30]. In addition to the uniaxial loading, the lateral confinement was found to influence the compressive response of ESF from quasi-static to high strain rates [31].…”

Section: Introductionmentioning

confidence: 99%