Browsing Mechanical and Mechatronics Engineering by Supervisor "Worswick, Michael"
Now showing items 1-20 of 26
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Application of a Rate Dependent Cohesive Zone Model to Predict Impact Response in Adhesively Bonded Ultra-High Strength Steel Tubes
(University of Waterloo, 2019-08-15)The design of multi-material lightweight vehicle (MMLV) structures incorporating structural adhesive joining requires advanced CAE supported by material characterization and computational model validation at the component ... -
Axial Crush Performance of Hot Stamped Tailor Welded Blanks - Experiments and Numerical Simulations
(University of Waterloo, 2019-01-30)This thesis investigates the axial crush performance of hot stamped tailor-welded blanks (TWBs) and their potential for weight reduction in the front crush structure of a vehicle. A baseline demonstrator structure, fabricated ... -
Characterisation and modeling of precipitation kinetics and yield strength in variously treated 7000-series aluminum alloys
(University of Waterloo, 2021-10-01)This thesis investigates the effects of: (a) various aging practices, and (b) deformation during a warm-forming cycle, on the precipitation hardening response and aging kinetics of AA7050 and AA7075, respectively. The ... -
Characterization and microstructure-based modeling of spot weld failure in hot stamped steel
(University of Waterloo, 2022-02-08)The performance of automotive safety components in a crash event depends on the mechanical properties of the sheet metal as well as the failure behavior of the spot welds that are used for sheet metal assembly. Unlike many ... -
Characterization and Modeling of Sheared Edge Failure in Advanced High Strength Steel
(University of Waterloo, 2018-03-07)Edge failure is one of the major problems associated with forming of advanced high strength steels (AHSS) such as dual-phase (DP) steels. The development of ferritic-bainitic steels such as complex-phase (CP) steels have ... -
Characterization and Simulation of Warm Forming of 6xxx and 7xxx Series Aluminum Alloys
(University of Waterloo, 2017-09-12)This thesis investigates warm forming of 6000 and 7000 series aluminum alloys, namely AA6013 T6, AA7075 T6 and a developmental 7000 series alloy (designated AA70XX T76), including characterization and validation of the ... -
Characterization of Spot Weld Failure within Weld Groups under Predominantly Shear Loading
(University of Waterloo, 2020-11-02)This thesis examines the failure behaviour of spot welded connections in components using three different aluminium-silicon coated hot stamped steels, Ductibor® 500-AS, Ductibor® 1000-AS, and Usibor® 1500-AS, with 1.2 mm ... -
Characterizing and Modeling the Effects of Mode Mixity and Bond Line Thickness on the Traction-Separation Response of Structural Adhesive Joints
(University of Waterloo, 2021-04-28)As adhesive bonding continues to become more prevalent in automotive structures, the need for high fidelity characterization and modelling of adhesive joints has gained in importance. In this thesis, new specimen geometry ... -
A Component-Level Study on the Effect of Warm Forming on Formability and Springback of Aluminum Alloy Brazing Sheet
(University of Waterloo, 2018-01-23)This thesis investigates the effect of warm forming (up to 350⁰C) on the formability and springback behavior of AA3003/AA4045 brazing sheet (0.2 mm gauge) for three temper conditions: O-, H22- and H24-tempers. The geometry ... -
Constitutive and Fracture Characterization and Modelling of Monolithic and Tailor-Welded Blanks of Press-Hardening Steels
(University of Waterloo, 2021-04-21)This study investigates the constitutive (flow) and fracture response of two automotive-grade press-hardening steels, Usibor® 1500-AS and Ductibor® 500-AS, as well as their tailor-welded blanks (TWBs), for a range of ... -
Constitutive and Fracture Characterization of an Anisotropic and Asymmetric Alloy Sheet
(University of Waterloo, 2018-02-14)Magnesium alloys can offer significant weight reduction over conventional steel or aluminum alloys. Specifically, rare-earth alloyed magnesium sheets have the potential to be used as light-weight structural alloys since ... -
Constitutive and Friction Characterization and Simulation of AA7075 Aluminum Alloy Sheet under Die Quenching Conditions
(University of Waterloo, 2022-10-31)This thesis investigates the die quench forming of AA7075 aluminum alloy sheet, including the constitutive and friction behaviour at elevated temperatures. Experiments examining characterization of friction behaviour and ... -
Constitutive Behaviour and Formability of Pre-aged AA7075 Sheet in a Warm Forming Process
(University of Waterloo, 2021-10-19)Warm constitutive and formability characterization of a high strength aluminum alloy (AA7075) was performed for a range of pre-aged (i.e. under-aged) tempers, strain rates and temperatures. The pre-aging processes were ... -
Crashworthiness and Material Characterization of Multi-cellular AA6063 Extrusions
(University of Waterloo, 2017-05-17)This thesis investigates the crashworthiness characteristics of the AA6063-T6 aluminum extrusions with two different multi-cellular cross-sections. The profiles under study are referred to as the Omega cross-section which ... -
Development of a Tailor-Welded Hot Stamped Side Frame Member
(University of Waterloo, 2020-01-10)This thesis investigates the application of hot stamped ultra-high strength steel (greater than 1000 MPa tensile strength) tailor-welded blanks in vehicle frontal crash energy management structures, as well as their potential ... -
Dynamic and Quasi-Static Response of Warm and Hot Formed Aluminum Beams Under Three-Point Bending
(University of Waterloo, 2018-01-23)This thesis investigates the effect of elevated temperature forming on the impact resistance of three aluminum alloys, AA6013-T6, AA7075-T6, and a developmental 7000-series alloy (designated AA7xxx-T76). Both die quenching ... -
Effect of Alloy Composition on the Hot Deformation Behavior, Extrudability and Mechanical Properties of AA6XXX Aluminum Alloys
(University of Waterloo, 2017-08-02)As automotive companies adjust to stricter environmental legislations, there is increased interest in the application of high specific strength alloys such as the AA6xxx aluminum alloys. In the near term, light weighting ... -
Effect of Elevated Temperature on Mechanical Behaviour and Springback of Aluminum Alloy Brazing Sheets
(University of Waterloo, 2016-04-29)The current work investigates the effect of warm forming process parameters on springback of AA3003 brazing sheets, comprising a modified AA3003 core with a lower melting point AA4045 clad layer used to promote brazing. ... -
Effect of Surface Treatment on Joint Performance and Fracture Morphology in Adhesively Bonded Al-Si Coated Ultra-High Strength Steel
(University of Waterloo, 2020-06-04)The Corporate average fuel economy (CAFE) standard set by the National Highway Traffic Safety Administration (NHTSA) has prompted automotive manufacturers to produce increasingly fuel efficient vehicles. Lightweighting of ... -
Failure Characterization of Hot Formed Boron Steels with Tailored Mechanical Properties
(University of Waterloo, 2016-04-01)This thesis presents the results from characterization of the failure behaviour of hot stamped USIBOR® 1500-AS steel sheet with tailored properties. A phenomenological approach is used in which failure strain is characterized ...