Interstage

Interstage

Interstage refers to the primary structure of a launch vehicle that serves as an interface between any two stages. It is responsible for maintaining the structural integrity of the rocket during launch and flight. The interstage must meet certain structural requirements, including a minimum axial stiffness, to ensure that the rocket's eigenfrequency is properly trimmed.From: Reliability analysis of composite anisogrid lattice interstage structure [2022], Research and Applications in Structural Engineering, Mechanics and Computation [2019]

Introduction

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Published in Sumit Sharma, Composite Materials, 2021

Sumit Sharma

Composite materials are used in launch vehicle applications for making the following components: Rocket motor caseInterstage structurePayload fairings and dispensersHigh-temperature nozzleNose coneControl surfaces.

Fabrication Processes

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Published in Manas Chanda, Plastics Technology Handbook, 2017

Manas Chanda

Because of high glass content, filament-wound parts have the highest strength-to-weight ratio of any reinforced thermoset. The process is thus highly suited to pressure vessels where reinforcement in the highly stressed hoop direction is important. Pipe installation, storage tanks, large rocket motor cases, interstage shrouds, high-pressure gas bottles, etc., are some of the products made of filament winding. The main limitation on the process is that it can only be used for fabricating objects which have some degree of symmetry about a central axis.

Reliability analysis of composite anisogrid lattice interstage structure

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Journal Information

Published in Mechanics Based Design of Structures and Machines, 2022

N. Raouf, A. Davar, Seid H. Pourtakdoust

The interstage is considered as a primary structure of a launch vehicle that acts as an interface structure between any two stages. This paper deals with reliability analysis of CALIS for a multi-stage launch vehicle subjected to some realistic uncertainties. In this sense, the failure probability of interstage structure conditioned on uncertainties in material, geometry as well as the applied loads is computed using various methods. The proposed scheme is useful for CAL design of any aerospace structure.

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Introduction

Fabrication Processes

Reliability analysis of composite anisogrid lattice interstage structure