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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.

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At least 91 records · Page 5

All sources NASA NTRS DOE OSTI

DOE OSTI2025

Polymers used in 4 mm PV Connectors [Slides]

Polymer cracks are not a new problem in the PV industry. However, the suddenness and severity of the cracking connector model is new and concerning. Some sites are experiencing wide-spread cracking of a specific connector model. The preliminary investigation results are (1) there are potential clearance issues with the O-ring, leading to high mechanical stress; (2) potential use of lubrication yields polymer embrittlement; and (3) clear mechanical or chemical differences between the affected model and other PPE-based models using FTIR and tensile testing could not be demonstrated.

36 MATERIALS SCIENCE↗

DOE OSTI2026

Evaluations of Connectors, Inlets, and Adapters on Side-Load and Withstand Force

This report examines the mechanical forces that direct current fast charging (DCFC) electric vehicle supply equipment (EVSE) connectors and electric vehicle (EV) inlet ports experience during normal usage. As we witness the fast and growing variety of EVs, charge port locations, and bigger and more powerful EVSE configurations including the SAE J3400 North American Charging Standard (NACS), which has increased the use of adapters with J3400 and J1772 compatibility. These new conditions contribute to increased mechanical forces due to their size, weight and lever arm effect, which creates the need to study and compare these forces to the limits on UL2251 and IEC 62196-1 standards. This report focuses solely on high power DC charging EVSE connectors, EV inlets and adapters for the specific compatibility cases on J3400 with J1772. We first describe the details of the 100N and the 750N side-load evaluations as described in the standards, then present the data obtained by replicating these tests to finally go into more detail on the findings and our recommendations.

100N↗

NASA NTRS1964

Connector for vacuum-jacketed lines cuts tubing system cost

A low-cost fitting, fabricated from standard connectors, is used for disconnecting flow lines in cryogenic systems. Utilizing vacuum-jacketed lines made from two sizes of tubing welded at the ends, the connectors are stronger and setup time is reduced.

Calvert, H. F.↗

NASA NTRS1964

Plastic molds reduce cost of encapsulating electric cable connectors

Resin casting of the aluminum master pattern forms a plastic mold for encapsulating a cable connector. An elastomer is injected into the mold and cured. The mold is disassembled leaving an elastomeric encapsulation around the connector.

Knott, D.↗

NASA NTRS1963

DESIGN CRITERIA FOR ZERO-LEAKAGE CONNECTORS FOR LAUNCH VEHICLES, VOLUME 6 - ENVIRONMENTAL EFFECTS

Pressure pulses, shock and vibratory loading on launch vehicle connectors - heat environment, vacuum and radiation effects on connector gaskets

LAUNCH VEHICLE↗

NASA NTRS1965

Gage measures electrical connector pin retention force

The retention force of a female connector pin is measured by observing the action of a calibrated spring in a gage consisting of housing, a plunger terminating in a male subminiature connector pin, and the tension spring.

Source record↗

NASA NTRS1965

Piezoresistive gage tests pin-connector sockets

Connector pin consisting of a piezoresistive crystal, retainer spring and a bridge circuit with voltmeter is used to test connector sockets and may be adapted for multiple socket testing.

Bond, W. W.↗

NASA NTRS1965

Improved solderless connector is easily disconnected

Compression type solderless connector is easily disconnected and reassembled and resists vibration. The connector, which uses a tapered split sleeve that is tightened by a nut into a mating bug, is used in place of standard solder lugs and to connect unsolderable wire.

Source record↗

NASA NTRS1965

Electrical cable connector-clamp has smooth exterior surface

Electrical cable connector-clamp fitted with a collet has a smooth exterior surface that can be easily gripped. The collet clamps a portion of the cable and provides for connecting it to a standard electrical connector.

Source record↗

NASA NTRS1965

Lightweight coaxial cable connector reduces signal loss

Connectors with milled interface surfaces for perfect electrical contact eliminate secondary- emission discharge and low signal loss in RF coaxial cables. the connectors which contain alignment and centering components for proper joint concentricity are used in communications systems designs.

Brejcha, A. G., Jr.↗

NASA NTRS1965

Threaded split ring connector separates structural sections

Threaded split ring connector quickly and cleanly separates two structural members by remote control. The connector is retained in an expanded position by spring plates that are deflected and held by an explosive bolt. Ignition of the bolt effects the separation. This conceptual approach lends itself to various configurations and sizes of structures.

Mayo, J. W.↗

NASA NTRS1966

Single connector provides safety fuses for multiple lines

Fuse-bearing sleeve which is inserted between the male and female members of a multiple-line connector contains a safety fuse for each pin of the connector assembly. The sleeve is easily and quickly opened for fuse replacement.

Weber, G. J.↗

NASA NTRS1966

High-pressure, low temperature electrical connector makes no-leak seal

Flow control of cryogenic liquids is achieved through use of an electrical feed-through connector with a solenoid-type valve. To prevent gas leakage, the connector is designed and structured so that extremely high pressure and low temperatures contribute to its sealing properties.

Weakley, J. F.↗

NASA NTRS1966

Tool enables proper mating of accelerometer and cable connector

Tool supports accelerometer in axial alignment with an accelerometer cable connector and permits tightening of the accelerometer to the cable connector with a torque wrench. This is done without damaging the components or permitting them to work loose under sustained, high-level vibrations.

Steed, C. N.↗

NASA NTRS1966

Diffusion bonding makes strong seal at flanged connector

Copper strip seals a high pressure fluid system connector so that it is insensitive to relaxation of the bolt loads. The copper strip is diffusion bonded to the surfaces of the connector flange by application of high pressure and temperature.

Gitzendanner, L. G.↗

NASA NTRS1966

Polarizing keys prevent mismatch of connector plugs and receptacles

Keying prevents mismatching of plugs and receptacles in connector patching of instrumentation involving several thousand leads. Each receptacle and plug contains three polarizing keys that must mate in a complementary mode before the connector pins and sockets will engage.

Chiapuzio, A.↗

NASA NTRS1966

Plug-in connector socket accepts coaxial cable end

Connector which includes a spring-loaded contact to receive a protruding center conductor and an internal collet to clamp against a collar attached to a woven outer conductor, is used as a receptacle for the end of a coaxial cable. This plug-in connector socket is used successfully with remote manipulators.

Mitchell, D.↗

NASA NTRS1966

Connector acts as quick coupling in coaxial cable application

Quick-coupling connector whose inner shells are threaded to the cable ends and whose outer shells have tracks that register in channels machined in the inner shells are rotated 45 deg to effect a locking of the coupling. This connector faithfully reproduces excellent electrical characteristics no matter how frequently assembled and disassembled.

Brejcha, A. G., Jr.↗