Experimental study of damage propagation in Over-height Compact Tension tests

Rigid low-density closed-cell polyisocyanurate (PIR) foams are used primarily as a thermal insulation material. Traditionally, they are manufactured from constituents produced by petrochemical industry. Introducing renewable materials in PIR formulation brings definite economical and environmental benefits. Fracture toughness of PIR foams obtained from renewable resources (with the polyol system comprising up to 80% of rapeseed oil esters) and petrochemical PIR foams has been characterized experimentally, by compact tension tests, for mode I crack propagation along the rise direction of the foams.

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Effects of the Hygrothermal Conditions on the Fracture Energy of the Concrete

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.711.397 ◽

2016 ◽

Vol 711 ◽

pp. 397-403

Author(s):

Hatem Kallel ◽

Hélène Carré ◽

Christian Laborderie ◽

Benoît Masson ◽

Nhu Cuong Tran

Keyword(s):

Fracture Energy ◽

Mechanical Behaviour ◽

Water Saturation ◽

Compact Tension ◽

Severe Accident ◽

Temperature Level ◽

Accurate Knowledge ◽

Tension Tests ◽

Experimental Apparatus ◽

Temperature Levels

The scenario of a severe accident in the containment building of a nuclear plant results in an increase in pressure, temperature and relative humidity that can reach respectively 5 bars, 140 °C and the saturation of water vapour. As well as the regulatory calculations, accurate knowledge of the thermal and mechanical behaviour of materials and more specifically of concrete is required to carry out more precise numerical simulations. Our study aims to investigate the mechanical behaviour of concrete under homogeneous conditions of moisture and temperature. An experimental apparatus was designed in order to assess the evolutions of the fracture energy of concrete. Different temperature levels up to a maximum of 110 °C and at different values of the controlled moisture content were investigated. The equipment was used to perform DCT (Disk-shape Compact Tension) tests at 30, 90 and 110 °C. Five levels of degree of liquid water saturation (Sw) were investigated for each temperature level.

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An eXtended Finite Element Model for Characterization of Concrete Fracture Properties with Compact Tension Tests

Pavements and Materials ◽

10.1061/41129(385)14 ◽

2010 ◽

Cited By ~ 1

Author(s):

Qingli Dai ◽

Kenny Ng

Keyword(s):

Finite Element ◽

Finite Element Model ◽

Element Model ◽

Compact Tension ◽

Concrete Fracture ◽

Extended Finite Element ◽

Fracture Properties ◽

Tension Tests

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Experimental Study and Simple Failure Analysis of Stitched J-Stiffened Composite Shear Panels

Journal of Reinforced Plastics and Composites ◽

10.1177/073168449601501101 ◽

1996 ◽

Vol 15 (11) ◽

pp. 1070-1087 ◽

Cited By ~ 6

Author(s):

Hsien-Yang Yeh ◽

Victor L. Chen

Keyword(s):

Experimental Study ◽

Failure Analysis ◽

Failure Criterion ◽

Resin Transfer Molding ◽

Failure Criteria ◽

Transfer Molding ◽

Tension Tests ◽

Failure Loads ◽

Composite Shear ◽

Tension Strength

Two fuselage type, stitched composite shear panels with J-shape stiffeners manufactured through the process of Resin Transfer Molding technique were tested. Through the diagonal tension tests, it was found that failure of each panel occurred at approximately 3.5 times its initial buckling load, indicating significant diagonal tension strength. Neither of the panels failed by stiffener “pop-off,” showing that the stitching helps to inhibit this failure mode. No other damage or delamination of the panel was visible as well. The newly developed generalized Yeh-Stratton (Y-S) failure criterion was used to evaluate the failure of these composite panels. Compared with several other failure criteria, the calculated failure loads are quite close to experimental results and all are conservative. The Y-S criterion is the most conservative for this case.

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GFRP sandwich composite with PET core in shell structure of footbridge

Budownictwo i Architektura ◽

10.35784/bud-arch.1894 ◽

2014 ◽

Vol 13 (2) ◽

pp. 183-190

Author(s):

Jacek Chróścielewski ◽

Marian Klasztorny ◽

Mikołaj Miśkiewicz ◽

Łukasz Pyrzowski ◽

Magdalena Rucka ◽

...

Keyword(s):

Experimental Study ◽

Shell Structure ◽

Sandwich Composite ◽

Sandwich Beams ◽

Compression Tests ◽

Bending Tests ◽

Tension Tests

The paper presents experimental study of sandwich composite used for an innovative foot-and-cycle bridge. The footbridge has a U-shaped shell structure made of sandwich consisting GFRP laminate covers and foam PET core. The bridge is manufactured using the infusion technology. Results of one and two directional tension tests of the laminates, compression tests of PET foam samples and 3-point as well as 4-point bending tests of sandwich beams are presented.

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J-Integral Approach to Fracture of Rotating Disk

Journal of Engineering Materials and Technology ◽

10.1115/1.3443460 ◽

1978 ◽

Vol 100 (2) ◽

pp. 128-133 ◽

Cited By ~ 8

Author(s):

M. Sakata ◽

S. Aoki ◽

M. Kanzawa ◽

N. Ogure ◽

K. Tateishi

Keyword(s):

Crack Growth ◽

Fracture Criterion ◽

Rotating Disk ◽

Compact Tension ◽

Nondestructive Inspection ◽

Integral Approach ◽

Plastic Behavior ◽

J Integral ◽

Rotating Disks ◽

Tension Tests

The J-integral has been used as a fracture criterion for elastic-plastic behavior of metals. It may be pertinent to use the JIc concept for design or nondestructive inspection of rotating disks which have crack-like flaws and exhibit some amount of plastic behavior to fracture. JIc for cracked rotating disks of rotor forging steel is determined experimentally and is compared with that obtained using compact specimens. It is shown that prediction based on the compact tension tests agrees well with initiation of crack growth in rotating disks.

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