Variable stiffness polymeric damper
Shock and vibration damping device using temperature sensitive solid amorphous polymers
Lohr, J. J.↗
Engineering topics
Lohr, J. J.
Publications and source records attributed to Lohr, J. J..
Accelerated Testing of the Mechanical and Thermal Integrity of Polymeric Materials
Long time mechanical and thermal stability of polymeric materials predicted from accelerated testing at increased temperature-time relations
Hamaker, F. M.↗
Concept for design of variable stiffness damper
Damping mechanism, containing polymeric-like materials is applicable to a wide range of shock and vibration. The polymeric-like material changes from a relatively stiff material to a relatively soft, rubbery material in the region of their glass transition temperatures. The energy absorption characteristics and stiffness are controllable with temperature.
Lohr, J. J.↗
Accelerated Testing of the Mechanical and Thermal Integrity of Polymeric Materials
Long time mechanical and thermal stability of polymeric materials predicted from accelerated testing at increased temperature-time relations
THERMAL INSTABILITY↗
A concept for design of variable-viscosity, variable-stiffness dampers
Variable viscosity, variable stiffness dampers using polymeric materials near glass transition temperatures for shock and vibration attenuation in space environment
SPACECRAFT INSTRUMENTATION↗
Analysis of ultraviolet radiation effects on yield stress of polymethyl methacrylate.
Yield stress of polymethyl methacrylate subjected to vacuum UV radiation is function of strain rate, tensile test temperature and irradiation dose
ULTRAVIOLET RADIATION↗
Time-temperature-strain rate equivalence for various engineering thermoplastics
Mechanical behavior and time temperature strain rate equivalence for acetal, polycarbonate, polyamide, and fluorocarbon
MECHANICAL PROPERTY↗
Yield stress master curves for various polymers below their glass transition temperatures.
Yield stress master curve for polymers below glass transition temperature
POLYMETHYL METHACRYLATE↗
Glass transition temperatures of poly/methyl methacrylate/ plasticized with low concentrations of monomer and diethyl phthalate.
Glass transition temperature of polymethyl methacrylate as affected by low concentrations of monomer and diethyl phthalate plasticizers
GLASS↗
Time-temperature-strain rate equivalence for various engineering thermoplastics.
Stress relaxation, stress-strain curve and time- temperature-strain rate equivalence for thermoplastic and viscoelastic polymers
STRAIN RATE↗
Time-temperature-strain rate equivalence for various engineering thermoplastics.
Linearity of mechanical behavior and applicability of yield stress master curve analyzed for various crystalline-type polymers
TEMPERATURE EFFECT↗
Mechanical properties of plastics predetermined by empirical method
To predetermine the mechanical properties of rigid plastics as a function of plasticizer content and composition, a set of equations has been empirically derived. These relate strain rate, yield stress, temperature, and weight fraction of the plasticizer.
Lohr, J. J.↗
Some effects of the space environment of the physical integrity of plastics
Weight loss of volatile solids in space environment
WEIGHT ANALYSIS↗
Yield stress master curves for various polymers below their glass transition temperatures
Yield stress master curves for polymethyl methacrylate, polystyrene, polyvinyl chloride and polyethylene terephthalate below glass transition temperature - polymer chemistry
POLYMER CHEMISTRY↗
An analytical method for evaluating the effects of radiation in vacuum on the mechanical properties of rigid plastics
Effects of radiation in vacuum on mechanical properties of rigid plastics
PLASTIC↗