John Joseph Francis Bonnen
Ford Motor Company
Crack growth resistance curveSpot weldingUltimate tensile strengthFatigue limitComposite materialAmplitudeMetallurgyMaterials scienceWeldingSheet metalElectrohydraulic formingTest proceduresHigh strength steelEffective strainMean stressFatigue damageAluminiumCrack tip opening displacementFracture mechanicsStructural engineeringCrack closureFormability
28Publications
9H-index
216Citations
Publications 27
Newest
#1Li Huang (NUAA: Nanjing University of Aeronautics and Astronautics)H-Index: 4
#1Li Huang (NUAA: Nanjing University of Aeronautics and Astronautics)H-Index: 4
Last. Xuming Su (Ford Motor Company)H-Index: 18
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Abstract The fatigue behavior of self-piercing rivet (SPR) joints joining differing thicknesses of AA6111-T4 aluminum and HSLA340 steel sheets in lap shear geometry was investigated in this paper. Crack initiation in the aluminum sheet was the dominant failure mode, while unexpected rivet shank failure tended to occur at high loading levels. Fretting wear was also observed at interface between aluminum and steel sheets as well as between the rivet and sheets under sinusoidal cyclic tension–tensi...
20 CitationsSource
#1Alexander V. Mamutov (Oakland University)H-Index: 5
#2Sergey Fedorovich Golovashchenko (Oakland University)H-Index: 20
Last. John Joseph Francis Bonnen (Ford Motor Company)H-Index: 9
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Abstract Electrohydraulic forming (EHF) is based upon the electro-hydraulic effect: a complex phenomenon related to the high voltage discharge inside the water filled chamber. The resulting shockwave in the liquid is propagated toward the blank, and the mass and momentum of the water in the shock wave accelerates the sheet metal blank toward the die. Methodology of numerical simulation of EHF processes was developed based upon LS-DYNA commercial code using Arbitrary Lagrange–Eulerian (ALE) Multi...
29 CitationsSource
#1Qiuren Chen (NU: Nanjing University)H-Index: 1
#1Qiuren Chen (NU: Nanjing University)H-Index: 1
Last. J.J.F. Bonnen (Ford Motor Company)H-Index: 3
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4 CitationsSource
#1Quochung Le (Ford Motor Company)H-Index: 1
#2James deVries (Ford Motor Company)H-Index: 1
Last. John Joseph Francis Bonnen (Ford Motor Company)H-Index: 9
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Abstract Edge quality produced by shearing processes often leads to reduced material formability which was observed in multiple studies and summarized in the reference literature. The intention to make the sheared edge performance more predictable has motivated development of several experimental techniques such as the hole expansion test and the half dogbone tensile test. The paper presents a detailed review of published results for both of these techniques and illustrates very limited research...
25 CitationsSource
#1John Joseph Francis Bonnen (Ford Motor Company)H-Index: 9
#2Sergey Fedorovich Golovashchenko (Ford Motor Company)H-Index: 20
Last. Alexander V. Mamutov (Oakland University)H-Index: 5
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In this paper, we present results of electrode durability testing and electrode design in a pulsed electrohydraulic discharge environment. Pulsed electrohydraulic forming (EHF) is an electrodynamic process based upon high-voltage discharge of capacitors between two electrodes positioned in a fluid-filled chamber. EHF enables a more uniform distribution of strains, widens the formability window, and reduces elastic springback in the final part when compared to traditional sheet metal stamping. Th...
5 CitationsSource
#1M. El-ZeghayarH-Index: 2
#1M. El-ZeghayarH-Index: 1
Last. R. SohmshettyH-Index: 1
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Dual phase 590 steel belongs to the family of advanced high strength steels (AHSS) that has gained popularity in the automotive industry as lightweight vehicle components. An experimental study on dual phase (DP) 590 as-received steel was conducted to study the effect of variable amplitude loading on the fatigue life and construct the effective strain-life curve for the material. Overloads were applied in the form of large near yield stress cycles that decreased the crack opening stress for the ...
1 Citations
#1Maria El-Zeghayar (UW: University of Waterloo)H-Index: 1
#2Tim Topper (UW: University of Waterloo)H-Index: 31
Last. J.J.F. Bonnen (Ford Motor Company)H-Index: 3
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1 CitationsSource
Mar 12, 2013 in CP (Principles and Practice of Constraint Programming)
#1John Joseph Francis Bonnen (Ford Motor Company)H-Index: 9
#2Tim Topper (UW: University of Waterloo)H-Index: 31
A series of unique long crack da/dN-delta K experiments that employedperiodic overloads to eliminate crack closure were used to determine both the mode I andthe mode II crack closure-free crack propagation behavior of normalized SAE 1045 steel.A good correlation was found between the mode I and mode II crack growth rate curves.Similarly, there was a good correlation between short crack growth rate data taken fromthe literature and the present crack closure-free long crack data. Short and long cr...
1 Citations
Mar 11, 2013 in CP (Principles and Practice of Constraint Programming)
#1John Joseph Francis Bonnen (Ford Motor Company)H-Index: 9
#2Tim Topper (UW: University of Waterloo)H-Index: 31
A series of in-phase axial-torsional smooth tube fatigue experiments wereperformed using regular intermittent overloads in otherwise constant amplitude load historiesto achieve crack-face interference-free (crack closure free) fatigue crack growth.Observations were made of not only the fatigue life but if and when the initial crackgrowth on a plane of maximum shear stress range changed to crack growth on a planeof maximum tensile stress range. Although there was a considerable scatter in the str...
#1John Joseph Francis Bonnen (Ford Motor Company)H-Index: 9
#1J.J.F. Bonnen (Ford Motor Company)H-Index: 3
Last. Tim Topper (UW: University of Waterloo)H-Index: 31
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Abstract Crack-face interference-free mode I and mode II crack-growth data was combined with smooth axial (λ = exy/exx = 0) and torsional (λ = ∞) endurance limit data to develop unified crack growth models that incorporate both shear and tensile cracking. The crack growth models incorporated growth from a slip band (including short crack behavior) size crack until the final failure of a long crack, and the ability to switch between crack growth on shear planes to growth on tensile planes. The mo...
2 CitationsSource