scholarly journals Characterization of Failure Surfaces of Epoxy Adhesive Under Varying Quasi-Static Loading Conditions

2020 ◽  
Vol 26 (S2) ◽  
pp. 1082-1083
Author(s):  
Hafiz Ali ◽  
Abdul Khaliq
Keyword(s):  
Static Loading ◽  
Epoxy Adhesive ◽  
Loading Conditions

scholarly journals Characterization of Failure Surfaces of Epoxy Adhesive Under Various Fatigue Loading Conditions

2020 ◽  
Vol 26 (S2) ◽  
pp. 1414-1416
Author(s):  
Hafiz Ali
Keyword(s):  
Fatigue Loading ◽  
Epoxy Adhesive ◽  
Loading Conditions

Microstructural and fractographic characterization of B4C-Al cermets tested under dynamic and static loading

1989 ◽  
Vol 47 ◽  
pp. 562-563
Author(s):  
Gyeung Ho Kim ◽  
Mehmet Sarikaya ◽  
D. L. Milius ◽  
I. A. Aksay
Keyword(s):  
Thin Film ◽  
Mechanical Properties ◽  
Fracture Toughness ◽  
Static Loading ◽  
Carbon Deposition ◽  
Full Density ◽  
Unique Combination ◽  
Strong Component ◽  
Reaction Products

Cermets are designed to optimize the mechanical properties of ceramics (hard and strong component) and metals (ductile and tough component) into one system. However, the processing of such systems is a problem in obtaining fully dense composite without deleterious reaction products. In the lightweight (2.65 g/cc) B4C-Al cermet, many of the processing problems have been circumvented. It is now possible to process fully dense B4C-Al cermet with tailored microstructures and achieve unique combination of mechanical properties (fracture strength of over 600 MPa and fracture toughness of 12 MPa-m1/2). In this paper, microstructure and fractography of B4C-Al cermets, tested under dynamic and static loading conditions, are described.The cermet is prepared by infiltration of Al at 1150°C into partially sintered B4C compact under vacuum to full density. Fracture surface replicas were prepared by using cellulose acetate and thin-film carbon deposition. Samples were observed with a Philips 3000 at 100 kV.

scholarly journals In situ deformation characterization of density-graded foams in quasi-static and impact loading conditions

2021 ◽  
Vol 150 ◽  
pp. 103820
Author(s):  
Behrad Koohbor ◽  
Suraj Ravindran ◽  
Addis Kidane
Keyword(s):  
Impact Loading ◽  
Loading Conditions ◽  
In Situ Deformation

Dynamic failure characterization of laser welds under combined loading conditions

2014 ◽  
Vol 15 (2) ◽  
pp. 237-252
Author(s):  
J. Ha ◽  
H. Huh
Keyword(s):  
Combined Loading ◽  
Loading Conditions ◽  
Dynamic Failure ◽  
Laser Welds

Characterization of elastic-plastic fracture toughness of AM60 Mg alloy under mixed-mode loading conditions

2018 ◽  
Vol 204 ◽  
pp. 388-403 ◽  
Author(s):  
Abuzar Es'haghi Oskui ◽  
Nasser Soltani
Keyword(s):  
Fracture Toughness ◽  
Mixed Mode ◽  
Mg Alloy ◽  
Loading Conditions ◽  
Mixed Mode Loading ◽  
Elastic Plastic

scholarly journals Rate-dependent ductile fracture under plane strain tension: experiments and simulations

2018 ◽  
Vol 183 ◽  
pp. 02022
Author(s):  
Vincent Grolleau ◽  
Vincent Lafilé ◽  
Christian C. Roth ◽  
Bertrand Galpin ◽  
Laurent Mahéo ◽  
...  
Keyword(s):  
High Strain Rate ◽  
Strain Rate ◽  
Plane Strain ◽  
Static Loading ◽  
High Strain ◽  
Fracture Initiation ◽  
Surface Strain ◽  
Experimental Program ◽  
Loading Conditions ◽  
Plane Strain Tension

Among all other stress states achievable under plane stress conditions, the lowest ductility is consistently observed for plane strain tension. For static loading conditions, V-bending of small sheet coupons is the most reliable way of characterising the strain to fracture for plane strain tension. Different from conventional notched tension specimens, necking is suppressed during V-bending which results in a remarkably constant stress state all the way until fracture initiation. The present DYMAT talk is concerned with the extension of the V-bending technique from low to high strain rate experiments. A new technique is designed with the help of finite element simulations. It makes use of modified Nakazima specimens that are subjected to V-bending. Irrespective of the loading velocity, plane strain tension conditions are maintained throughout the entire loading history up to fracture initiation. Experiments are performed on specimens extracted from aluminum 2024-T3 and dual phase DP450 steel sheets. The experimental program includes quasi static loading conditions which are achieved on a universal testing machine. In addition, high strain rate experiments are performed using a specially-designed drop tower system. In all experiments, images are acquired with two cameras to determine the surface strain history through stereo Digital Image Correlation (DIC). The experimental observations are discussed in detail and also compared with the numerical simulations to validate the proposed experimental technique

Development and fracture toughness characterization of a nylon nanomat epoxy adhesive reinforcement

2018 ◽  
pp. 146442071880773
Author(s):  
TM Brugo ◽  
F Musiari ◽  
A Pirondi ◽  
A Zucchelli ◽  
D Cocchi ◽  
...  
Keyword(s):  
Fracture Toughness ◽  
Epoxy Adhesive

Fatigue Behavior of Adhesive Joints Under Biaxial Loading Conditions

1993 ◽  
Author(s):  
Erol Sancaktar
Keyword(s):  
Biaxial Loading ◽  
Fatigue Behavior ◽  
Epoxy Adhesive ◽  
Steel Beams ◽  
Loading Conditions ◽  
Adhesively Bonded Joints ◽  
Shear Loads ◽  
Bonded Joint ◽  
Solid Film ◽  
Static Shear

Abstract Fatigue data obtained under biaxial loading conditions for adhesively bonded joints are used to plot S-N type diagrams to assess the effects of biaxiality in loading. Independently Loaded Mixed-Mode Specimens (ILM MS) are used for data collection purposes. These specimens are basically two (steel) beams bonded to be fatigue loaded under cantilever (opening) mode while a simultaneous but physically separate in-plane (static) shear load is also induced with the aid of a small hydraulic piston embedded in the specimen. Application of such static shear loads results in different S-N behavior for the bonded joint. The model adhesives used are Metlbond 1113-2 and Metlbond 1113 solid film thermosetting adhesives similar to those commonly used in aircraft and aerospace industries. The former is an elastomer-modified epoxy adhesive and the latter is identical except that it containes a synthetic earner cloth. Thus, the effects of carrier cloth in adhesive’s S-N behavior is also assessed. Analytically, the classical linear log-log representation of the adhesive S-N data is explored and modifications necessary to reflect the effects of biaxiality in loading and also the presence of a carrier cloth are assessed. The fatigue failure results are also compared with results obtained under monotonic biaxial loading conditions.

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