Senior Mechanical Engineer - Stress Analysis
ZiplineAbout the role
About Zipline
Zipline is the world’s largest and most experienced drone delivery service. We are on a mission to serve all humans equally by ensuring access to food, medicine and essential goods anytime, anywhere. We design, build, and operate the world’s largest autonomous logistics system, delivering critical supplies quickly and reliably. Today, Zipline operates on four continents, makes a delivery somewhere in the world every 30 seconds, and has completed millions of deliveries to date, including blood, vaccines, medical supplies, food, and retail products.
Our customers include the world’s largest and most prominent healthcare systems, governments, retailers, restaurants and global businesses who rely on us to save lives, reduce emissions, increase economic opportunity, and provide delivery from point A to point B as fast as possible. The drone is only 15% of what we’ve built to enable seamless, reliable, global operations.
Our system strengthens supply chains, reduces congestion, and gives people time back. With more than 140 million commercial autonomous miles safely flown, Zipline is redefining access to healthcare, consumer products, and food across the globe.
We operate at a global scale and are looking for practical problem solvers who thrive on real-world challenges and rapid growth. Our team is motivated by building systems that have a direct, meaningful impact on people’s lives and by scaling the future of logistics. We are seeking people who sculpt from first principles, enjoy facing adversity, and can do the impossible at record breaking speeds.
About You and The Role
You enjoy solving complex structural problems using first principles analysis coupled with system level finite element models (FEM). You will be responsible for the structural design and analysis of aircraft primary structure from conceptual architecture phase through qualification testing. In this role you will own the durability and damage tolerance analysis of flight and ground structures including setting and upholding analysis requirements, processes, and standards. This role will work closely with structures and subsystems engineers to design and analyze fracture and fatigue tolerant structures and interfaces that operate in extreme environments for years without inspection or maintenance. You will work closely with Reliability and Test Engineering to identify, investigate, and root cause failures discovered in testing and in the field.
How to know if it's you: You’ve built your own prototypes to get quick answers, pencil and paper calculations are always your first step, you prefer simple and fast over detailed and large, you are on the floor during system testing, you have never presented a FEM plot without adjusting the legend scale . On any given day you could be building test articles in our composites/prototype labs, developing simple models to inform design trade studies, performing structural tests to validate analysis, working across disciplines to tackle complex system level challenges, root causing a test or field failure, or in the field supporting flight tests.
Zipline was founded by engineers dedicated to making the world a better place. We are building a new global industry and are looking for a talented engineer who takes a hands-on approach and will use analysis to drive design. The ideal candidate will be someone who excels in a fast paced, dynamic environment and is excited to own and drive simple, elegant solutions to complex problems that will help save lives every day.
What You'll Do
- Vehicle Structural Analysis
- Evaluate and optimize system (flight and ground) for structural loads, vibration modes, and deflections
- Perform analysis and sizing of airframe primary and secondary structure including static, dynamic, stability and damage tolerance analysis for metallic and non-metallic structures
- Classical stress analysis (Roark/Bruhn) to do initial sizing
- Dynamic analysis, including structural modes, random vibration, and forced harmonic vibration
- Drive design trades with data from lightweight FEMs (Beams/Shells) that can be rapidly updated (daily) to match evolving configurations
- Durability and Damage Tolerance (DADT) Analysis
- Evaluate and optimize metallic, composite, and plastic structures (flight + ground) for resistance to fatigue and fracture
- Own and design elegant structural solutions for fracture critical components
- Define program DADT requirements and methodologies for developing and analyzing damage tolerant designs for composites, metallics, and plastics, including developing fatigue spectra for fracture critical components
- Quantify impact damage limits for metallic and composite structures
- Derive material property requirements and maximum allowa
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