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Standard

Standard Test Method for Impact of a Soft Projectile on a Symmetric Leading Edge Assembly

2024-07-08
WIP
AS8990
This document describes a method for measuring deformations, damages, and fragment distribution patterns during an impact between a soft or frangible projectile and a symmetric leading edge assembly. The document describes the hardware, setup, and instrumentation required. In this test method a soft body projectile impacts a leading edge assembly with a symmetric curvature while the apex of the leading edge is oriented with a sweep angle. The load vector of impact is on the symmetry plane. The ductile target is supported by a rigid adapter structure behind. The target must be sufficiently large so that the projectile flows around its curvature and induces an indentation. This test is intended for measuring the remaining plastic deformation and damage of the target after the impact. The projectile breakup pattern data may also be captured during this test. Optionally, a dynamic deformation measurement and / or a force measurement can be included.
Standard

Standard Test Method for Measuring Impact Forces and Pressures of a Soft Projectile on an Inclined Rigid Flat Surface

2024-01-16
CURRENT
AS6999
This document describes methods for measuring dynamic forces, pressures, and projectile fragment distribution patterns during an impact between a soft or frangible projectile and a rigid flat inclined surface. It also describes the hardware, setup, and instrumentation required. In this test method, a soft body projectile impacts a rigid plate inclined at a specified angle to the direction of flight. The rigid target plate is backed up by a rigid structure, and sandwiched between the plate and the structure are force sensors to record reaction loads. Optionally, pressure transducers may be embedded in the target plate to record the pressure-time history of the impact. The target plate shall be sufficiently large so that the projectile flows across the surface without passing behind the plane of the plate impact surface, therefore capturing all of the impact load.
Standard

Standard Test Method for Measuring Forces During Dynamic Slicing of a Soft Projectile

2023-02-07
WIP
AS7254
This document describes a method for measuring transient forces generated by the impact of a soft or frangible projectile on a thin blade oriented in a plane parallel to the direction of the projectile motion. The document describes the hardware and instrumentation required as well as the processing and data reduction required to compute force. In this test a projectile impacts a relatively thin, flat, blade-like object with a sharp leading edge. The direction of motion of the projectile is parallel to the plane of the slicer. The test is designed to mimimize lateral motion in the projectile as a result of the impact. The intended impact velocity range for this test is between approximately 50 m/sec and 300 m/sec. The blade has a length greater than the largest diameter of the projecile and is supported on a fixture instrumented to measure force. The pojectile material is expected to be soft compared with the blade material.
Standard

Standard Test Method for Normal Impact of a Soft Projectile on a Clamped Plate

2021-07-01
WIP
AS7372
This document describes a method for measuring deformations from a normal impact between a soft or frangible projectile and clamped plate. The document describes the hardware, setup, and instrumentation required. In this test method a soft body projectile impacts a square ductile plate clamped on all four sides. This test is intended for measuring the remaining plastic deformation of the target after the impact.The values stated in either SI units or inch-pound units are considered separate standards. The values stated in each system may not be exactly equivalent; therefore, each system must be considered as independent. This standard does not address all of the safety concerns associated with its use. It is the responsibility of each user of this standard to ensure that any safety issues are properly addressed.
Standard

Standard Test Method for Normal Impact of a Soft Projectile on a Hemispherical Leading Edge

2021-05-25
WIP
AS7371
This document describes a method for measuring deformations, and fragment distribution patterns during an impact between a soft or frangible projectile and a regular helispherical leading edge. The document describes the hardware, setup, and instrumentation required. In this test method a soft body projectile impacts a helispherical leading edge symmetric to the curvature and centric in the transversal direction. The ductile target is backup by a rigid adapter structure behind. The target must be sufficiently large so that the projectile flows around its curvature and induces an indentation. This test is intended for measuring the remaining plastic deformation of the target after the impact. The projectile breakup pattern data may also be captured during this test. The values stated in either SI units or inch-pound units are considered separate standards. The values stated in each system may not be exactly equivalent; therefore, each system must be considered as independent.
Standard

Standard Test Method for Measuring Forces During Normal Impact of a Soft Projectile on a Rigid Flat Surface

2021-03-23
CURRENT
AS6940
This document describes a method for measuring forces during an impact between a soft or frangible projectile and a relatively rigid flat normal surface. The document describes the hardware and instrumentation required, as well as the processing and data reduction required to compute force. In this test, a projectile impacts one end of a long cylindrical bar with flat ends, called a Hopkinson bar. The impact occurs on the centerline of the bar in the axial direction. The diameter of the cylindrical bar is large compared to the lateral dimension of the projectile so that, during and after the impact, the projectile material moves radially or backward, rather than extruding around the perimeter of the impact surface. The bar is instrumented with strain gages at some distance from the impacted end to measure the longitudinal strain in the bar.
Standard

Tests Recommended for Qualifying an Artificial Bird for Aircraft Certification Testing

2018-03-27
WIP
ARP6924
This document defines the Level 1 tests required for qualifying an artificial bird for certification testing of aircraft and aircraft engines. Level 1 refers to the lowest level of the test pyramid associated with the building block approach defined in the CMH-17 Composite Materials Handbook. The test pyramid consists of a sequence of 5 levels of testing, ranging from the most basic at the lowest level of the pyramid to the most complex at the apex. Typically the number of tests performed has an inverse relationship to the complexity of the tests. The building block approach is used for defining the tests required to qualify an artificial bird that would be accepted by regulatory agencies for certification testing of aircraft, including rotorcraft, fixed wing fuselages and engines, where bird strike testing is currently required. This document only describes the tests required for Level 1 of the test pyramid. Separate documents define the tests required at higher levels.
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