An insight into mode II fracture toughness testing using SCB specimen
Bahador Bahrami
Fatigue and Fracture Research Laboratory, Center of Excellence in Experimental Solid Mechanics and Dynamics, School of Mechanical Engineering, Iran University of Science and Technology, Tehran, Iran
Search for more papers by this authorCorresponding Author
Majid R. Ayatollahi
Fatigue and Fracture Research Laboratory, Center of Excellence in Experimental Solid Mechanics and Dynamics, School of Mechanical Engineering, Iran University of Science and Technology, Tehran, Iran
Correspondence
Majid R. Ayatollahi, Fatigue and Fracture Research Laboratory, Center of Excellence in Experimental Solid Mechanics and Dynamics, School of Mechanical Engineering, Iran University of Science and Technology, Narmak, 16846 Tehran, Iran.
Email: [email protected]
Search for more papers by this authorIman Sedighi
Fatigue and Fracture Research Laboratory, Center of Excellence in Experimental Solid Mechanics and Dynamics, School of Mechanical Engineering, Iran University of Science and Technology, Tehran, Iran
Search for more papers by this authorMohd Yazid Yahya
Center for Advanced Composite Materials, Universiti Teknologi Malaysia, Johor Bahru, Malaysia
Search for more papers by this authorBahador Bahrami
Fatigue and Fracture Research Laboratory, Center of Excellence in Experimental Solid Mechanics and Dynamics, School of Mechanical Engineering, Iran University of Science and Technology, Tehran, Iran
Search for more papers by this authorCorresponding Author
Majid R. Ayatollahi
Fatigue and Fracture Research Laboratory, Center of Excellence in Experimental Solid Mechanics and Dynamics, School of Mechanical Engineering, Iran University of Science and Technology, Tehran, Iran
Correspondence
Majid R. Ayatollahi, Fatigue and Fracture Research Laboratory, Center of Excellence in Experimental Solid Mechanics and Dynamics, School of Mechanical Engineering, Iran University of Science and Technology, Narmak, 16846 Tehran, Iran.
Email: [email protected]
Search for more papers by this authorIman Sedighi
Fatigue and Fracture Research Laboratory, Center of Excellence in Experimental Solid Mechanics and Dynamics, School of Mechanical Engineering, Iran University of Science and Technology, Tehran, Iran
Search for more papers by this authorMohd Yazid Yahya
Center for Advanced Composite Materials, Universiti Teknologi Malaysia, Johor Bahru, Malaysia
Search for more papers by this authorAbstract
The effect of friction forces between the test specimen and its bottom supports on the mode II fracture toughness values obtained using the semicircular bend (SCB) specimen is investigated. First, a number of experiments were conducted on SCB specimen in order to determine the mode II fracture toughness of polymethyl methacrylate (PMMA) according to the conventional approaches available in the literature. Three different types of supports that have been frequently employed by researchers in recent years were used to evaluate the effect of support type on the fracture loads. It was found that the friction forces between the supports and the SCB specimen have a significant effect on the value of mode II fracture toughness measured using the SCB samples. Then, the specimen was simulated using finite element method for more detailed investigation on the near crack tip stress field evolution when friction forces increase between the supports and the SCB specimen. The finite element results confirmed that the type of support affects not only the stress intensity factors KI and KII but also the T-stress. The experimental and numerical results showed that the use of the crack tip parameters available in literature for frictionless contact between the supports and the SCB specimen can result in significant errors when the mode II experiments are performed by using the fixed or roller-in-grove types of supports.
REFERENCES
- 1Miao X, Yu Q, Zhou C, Li J, Wang Y, He X. Experimental and numerical investigation on fracture behavior of CTS specimen under I-II mixed mode loading. Eur J Mech - A/Solids. 2018; 72: 235-244.
- 2Noury PM, Shenoi RA, Sinclair I. On mixed-mode fracture of PVC foam. Int J Fract. 1998; 4412: 131-151.
- 3Lee CC, Huang PC. Mixed mode interfacial crack energy estimation of glass interposer and SiNx coatings by using fracture mechanics based computer methods and experimental validations. Theor Appl Fract Mech. 2018; 96: 790-794.
- 4Fakhri M, Amoosoltani E, Aliha MRM. Crack behavior analysis of roller compacted concrete mixtures containing reclaimed asphalt pavement and crumb rubber. Eng Fract Mech. 2017; 180: 43-59.
- 5Wang C, Zhu ZM, Liu HJ. On the I-II mixed mode fracture of granite using four-point bend specimen. Fatigue Fract Eng Mater Struct. 2016; 39(10): 1193-1203.
- 6Aliha MRM, Hosseinpour GR, Ayatollahi MR. Application of cracked triangular specimen subjected to three-point bending for investigating fracture behavior of rock materials. Rock Mech Rock Eng. 2013; 46(5): 1023-1034.
- 7Ayatollahi MR, Aliha MRM. Cracked Brazilian disc specimen subjected to mode II deformation. Eng Fract Mech. 2005; 72(4): 493-503.
- 8Ayatollahi MR, Aliha MRM. On the use of Brazilian disc specimen for calculating mixed mode I-II fracture toughness of rock materials. Eng Fract Mech. 2008; 75(16): 4631-4641.
- 9Hua W, Dong S, Pan X, Wang Q. Mixed mode fracture analysis of CCBD specimens based on the extended maximum tangential strain criterion. Fatigue Fract Eng Mater Struct. 2017; 40(12): 2118-2127.
- 10Ghouli S, Ayatollahi MR, Bushroa AR. Fracture characterization of ceria partially stabilized zirconia using the GMTSN criterion. Eng Fract Mech. 2018; 199: 647-657.
- 11Levesque G, Arakere NK, Mecholsky JJ, Gopalakrishnan K. Numerical and experimental investigation of mixed-mode fracture parameters on silicon nitride using the Brazilian disc test. Fatigue Fract Eng Mater Struct. 2010; 33(8): 490-503.
- 12Ayatollahi MR, Aliha MRM, Hassani MM. Mixed mode brittle fracture in PMMA—an experimental study using SCB specimens. Mater Sci Eng A. 2006; 417(1-2): 348-356.
- 13Ayatollahi MR, Aliha MRM. On determination of mode II fracture toughness using semi-circular bend specimen. Int J Solids Struct. 2006; 43(17): 5217-5227.
- 14Mirsayar MM, Razmi A, Berto F. Tangential strain-based criteria for mixed-mode I/II fracture toughness of cement concrete. Fatigue Fract Eng Mater Struct. 2018; 41(1): 129-137.
- 15Razmi A, Mirsayar MM. On the mixed mode I/II fracture properties of jute fiber-reinforced concrete. Construct Build Mater. 2017; 148: 512-520.
- 16Aliha MRM, Bahmani A, Akhondi S. Mixed mode fracture toughness testing of PMMA with different three-point bend type specimens. Eur J Mech A/Solids. 2016; 58: 148-162.
- 17Aliha MRM. On predicting mode II fracture toughness (KIIc) of hot mix asphalt mixtures using the strain energy density criterion. Theor Appl Fract Mech. 2019; 99: 36-43.
- 18Aliha MRM, Fattahi Amirdehi HR. Fracture toughness prediction using Weibull statistical method for asphalt mixtures containing different air void contents. Fatigue Fract Eng Mater Struct. 2017; 40(1): 55-68.
- 19Torabi AR, Kalantari MH, Aliha MRM. Fracture analysis of dissimilar Al-Al friction stir welded joints under tensile/shear loading. Fatigue Fract Eng Mater Struct. 2018; 41(9): 2040-2053.
- 20Elghazel A, Taktak R, Bouaziz J. Combined numerical and experimental mechanical characterization of a calcium phosphate ceramic using modified Brazilian disc and SCB specimen. Mater Sci Eng A. 2016; 670: 240-251.
- 21Ghasemi-Ghalebahman A, Akbardoost J, Ghaffari Y. Evaluation of size effect on mixed-mode fracture behavior of epoxy/silica nanocomposites. J Strain Anal Eng Des. 2017; 52: 239-248.
- 22Ayatollahi MR, Aliha MRM, Saghafi H. An improved semi-circular bend specimen for investigating mixed mode brittle fracture. Eng Fract Mech. 2011; 78(1): 110-123.
- 23Chavez F, Marcobal J, Gallego J. Laboratory evaluation of the mechanical properties of asphalt mixtures with rubber incorporated by the wet, dry, and semi-wet process. Construct Build Mater. 2019; 205: 164-174.
- 24Aliha MRM, Mousavi SS, Bahmani A, Linul E, Marsavina L. Crack initiation angles and propagation paths in polyurethane foams under mixed modes I/II and I/III loading. Theor Appl Fract Mech. 2019; 101: 152-161.
- 25Ameri M, Nowbakht S, Molayem M, Aliha MRM. Investigation of fatigue and fracture properties of asphalt mixtures modified with carbon nanotubes. Fatigue Fract Eng Mater Struct. 2016; 39(7): 896-906.
- 26Zuo JP, Yao MH, Li YJ, Zhao SK, Jiang YQ, Li ZD. Investigation on fracture toughness and micro-deformation field of SCB sandstone including different inclination angles cracks. Eng Fract Mech. 2019; 208: 27-37.
- 27Lin Q, Ji W-W, Pan P-Z, Wang S, Lu Y. Comments on the mode II fracture from disk-type specimens for rock-type materials. Eng Fract Mech. 2019; 211: 303-320.
- 28Su C, Wu Q, Weng L, Chang X. Experimental investigation of mode I fracture features of steel fiber-reinforced reactive powder concrete using semi-circular bend test. Eng Fract Mech. 2019; 209: 187-199.
- 29Ban H, Im S, Kim YR. Mixed-mode fracture characterization of fine aggregate mixtures using semicircular bend fracture test and extended finite element modeling. Construct Build Mater. 2015; 101: 721-729.
- 30Fathipour Azar H, Choupani N, Afshin H, Hamidzadeh Moghadam R. Effect of mineral admixtures on the mixed-mode (I/II) fracture characterization of cement mortar: CTS, CSTBD and SCB specimens. Eng Fract Mech. 2015; 134: 20-34.
- 31Torabi AR, Bahrami B, Ayatollahi MR. Mixed mode I/II brittle fracture in V-notched Brazilian disk specimens under negative mode I conditions. Phys Mesomech. 2016; 19(3): 332-348.
- 32Meneghetti G, Campagnolo A, Avalle M, et al. Rapid evaluation of notch stress intensity factors using the peak stress method: comparison of commercial finite element codes for a range of mesh patterns. Fatigue Fract Eng Mater Struct. 2018; 49(5):1044-1063.
- 33Campagnolo A, Meneghetti G, Berto F. Rapid finite element evaluation of the averaged strain energy density of mixed-mode (I + II) crack tip fields including the T-stress contribution. Fatigue Fract Eng Mater Struct. 2016; 39(8): 982-998.
- 34Meneghetti G, Campagnolo A, Berto F, Atzori B. Averaged strain energy density evaluated rapidly from the singular peak stresses by FEM: cracked components under mixed-mode (I + II) loading. Theor Appl Fract Mech. 2015; 79: 113-124.
- 35Campagnolo A, Meneghetti G. Rapid estimation of notch stress intensity factors in 3D large-scale welded structures using the peak stress method. MATEC Web Conf. 2018; 165:17004.
10.1051/matecconf/201816517004 Google Scholar
- 36Pook LP, Campagnolo A, Berto F, Lazzarin P. Coupled fracture mode of a cracked plate under anti-plane loading. Eng Fracture Mech. 2015; 134: 391-403.
