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Ilia Gotlib Masters Thesis.pdf (4.89 MB)

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An Analysis of High-Speed Impact Nailing for Lightweight Automotive Structures

Gotlib, Ilia
http://rave.ohiolink.edu/etdc/view?acc_num=osu1408718602

Abstract Details

2014, Master of Science, Ohio State University, Mechanical Engineering.
With an increase in demand for ecofriendly vehicles, the automotive industry is pushing towards multi-material manufacturing. The ability to join a variety of materials is becoming an increasing concern and area of focus for many vehicle manufacturers. High-speed, ridged nailing is a possible method for joining these dissimilar materials. The goal of this study was to characterize and quantify joint strength and joining process by studying the effects of the processing parameters on the creation and strength of the joints. The first step in accomplishing this was to create a set of fixtures that facilitated the repeatable creation of ridged nail joints, a measurement system that allowed for accurate qualification of the joints, and a set of procedures to test the strength of the joints in push-out, tension, and shear. Several processing parameter studies were then conducted in order to qualify the joints. SAS was used to analyze the data and it was determined that the significant input parameters governing joint quality and strength were the ridged nail setting tool pressure level, the square of the pressure level, the preload on the tool, the square of the preload, and the interaction between preload and pressure. In addition, a quadratic model was fit to the data in order to characterize the relationship between the input parameters and the joint qualification. A loss function was also created to study the robustness of the processing window. A series of tests were performed on joints created out of various thickness combinations of aluminum disks. These joints were then tested to failure under the 3 loading conditions and the modes of failure were characterized. Joints loaded in push-out and tension failed via the shearing of material with the nail’s ridges. Joints loaded in shear failed via the ridged nails shearing near the head. The material stiffness of the disks was investigated in relation to the failure loads and a relationship between the stiffness of the lower disk and the tensile failure load was found. A final study considered the effects of pre-drilled holes on joint push-out strength and found them to be adverse.
Anthony Luscher (Advisor)
Daniel Mendelsohn (Committee Member)
157 p.
Mechanical Engineering
joining; fastening; structural analysis

Recommended Citations

Citations

  • Gotlib, I. (2014). An Analysis of High-Speed Impact Nailing for Lightweight Automotive Structures [Master's thesis, Ohio State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=osu1408718602

    APA Style (7th edition)

  • Gotlib, Ilia. An Analysis of High-Speed Impact Nailing for Lightweight Automotive Structures. 2014. Ohio State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=osu1408718602.

    MLA Style (8th edition)

  • Gotlib, Ilia. "An Analysis of High-Speed Impact Nailing for Lightweight Automotive Structures." Master's thesis, Ohio State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=osu1408718602

    Chicago Manual of Style (17th edition)

osu1408718602
1,179
© 2014, all rights reserved.
This open access ETD is published by The Ohio State University and OhioLINK.