Pure mode I and pure mode II fracture resistance of modified hot mix asphalt at low and intermediate temperatures

2021 ◽  
Author(s):  
Mohammad Zarei ◽  
Ali Abdi Kordani ◽  
Mohsen Zahedi
Keyword(s):  
Fracture Resistance ◽  
Hot Mix Asphalt ◽  
Mode I ◽  
Mode Ii ◽  
Pure Mode ◽  
Mode Ii Fracture

Mode I and Mode II Fracture Toughness Testing for a Coarse Grain Marble

2006 ◽  
Vol 5-6 ◽  
pp. 181-188 ◽  
Author(s):  
M.R.M. Aliha ◽  
R. Ashtari ◽  
Majid R. Ayatollahi
Keyword(s):  
Fracture Toughness ◽  
Coarse Grain ◽  
Mode I ◽  
Mode Ii ◽  
Pure Mode ◽  
Mode I Fracture ◽  
Mode Ii Fracture ◽  
Mode I Fracture Toughness ◽  
Mode Ii Fracture Toughness ◽  
T Stress

A series of fracture toughness tests have been conducted on a type of coarse grain marble. The tests were carried out either in pure mode I or in pure mode II conditions by using the cracked chevron notched Brazilian disc (CCNBD) specimen. A total number of 44 CCNBD specimens were tested, half in pure mode I and the rest in pure mode II, to obtain reliable values for mode I and mode II fracture toughness (KIc and KIIc) of the tested marble. The average value of KIc for this marble was approximately about 1.12 MPa m showing a good agreement with those reported for similar coarse grain marbles. The mode II fracture toughness was found to be 2.25 MPa m in average which is approximately twice the mode I fracture toughness. However, the conventional fracture criteria suggest that the mode I fracture toughness should be higher than the mode II fracture toughness, (KIc>KIIc). According to these criteria, the ratio of KIIc / KIc is a figure typically between 0.63 and 0.96. It is shown in this paper that enhanced mode II fracture toughness of CCNBD specimen could be due to the effects of highly negative T-stress when the specimen is subjected to mode II. It is also shown that an improved prediction for the ratio KIIc / KIc can be achieved when the effect of T-stress is taken into account.

scholarly journals Mixed-Mode Interlaminar Fracture Toughness of Glass and Carbon Fibre Powder Epoxy Composites—For Design of Wind and Tidal Turbine Blades

Materials ◽  
2021 ◽  
Vol 14 (9) ◽  
pp. 2103
Author(s):  
Christophe Floreani ◽  
Colin Robert ◽  
Parvez Alam ◽  
Peter Davies ◽  
Conchúr M. Ó. Brádaigh
Keyword(s):  
Fracture Toughness ◽  
Carbon Fibre ◽  
Composite Structures ◽  
Mixed Mode ◽  
Epoxy Composites ◽  
Mode I ◽  
Mode Ii ◽  
Pure Mode ◽  
Interlaminar Fracture Toughness ◽  
Interlaminar Fracture

Powder epoxy composites have several advantages for the processing of large composite structures, including low exotherm, viscosity and material cost, as well as the ability to carry out separate melting and curing operations. This work studies the mode I and mixed-mode toughness, as well as the in-plane mechanical properties of unidirectional stitched glass and carbon fibre reinforced powder epoxy composites. The interlaminar fracture toughness is studied in pure mode I by performing Double Cantilever Beam tests and at 25% mode II, 50% mode II and 75% mode II by performing Mixed Mode Bending testing according to the ASTM D5528-13 test standard. The tensile and compressive properties are comparable to that of standard epoxy composites but both the mode I and mixed-mode toughness are shown to be significantly higher than that of other epoxy composites, even when comparing to toughened epoxies. The mixed-mode critical strain energy release rate as a function of the delamination mode ratio is also provided. This paper highlights the potential for powder epoxy composites in the manufacturing of structures where there is a risk of delamination.

scholarly journals The influence of interlayer/epoxy adhesion on the mode-I and mode-II fracture response of carbon fibre/epoxy composites interleaved with thermoplastic veils

2020 ◽  
Vol 192 ◽  
pp. 108781 ◽  
Author(s):  
Dong Quan ◽  
Brian Deegan ◽  
René Alderliesten ◽  
Clemens Dransfeld ◽  
Neal Murphy ◽  
...  
Keyword(s):  
Carbon Fibre ◽  
Epoxy Composites ◽  
Mode I ◽  
Mode Ii ◽  
Mode Ii Fracture

Comparison of mode I and mode II fracture toughness of an 8090 AlLi alloy

1991 ◽  
Vol 149 (1) ◽  
pp. L1-L3 ◽  
Author(s):  
S.V. Kamat ◽  
N. Eswara Prasad ◽  
G. Malakondaiah
Keyword(s):  
Fracture Toughness ◽  
Mode I ◽  
Mode Ii ◽  
Mode Ii Fracture ◽  
Mode Ii Fracture Toughness

Corrigendum to “Mode I and Mode II fracture energy of MWCNT reinforced nanofibrilmats interleaved carbon/epoxy laminates” [Compos. Sci. Technol. 90 (2014) 48–56]

2014 ◽  
Vol 93 ◽  
pp. 114 ◽  
Author(s):  
Shay Hamer ◽  
Herman Leibovich ◽  
Anthony Green ◽  
Ron Avrahami ◽  
Eyal Zussman ◽  
...  
Keyword(s):  
Fracture Energy ◽  
Mode I ◽  
Mode Ii ◽  
Mode Ii Fracture
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