The phrase "a weakening effect on" is correct and usable in written English.
It can be used when discussing the impact or influence that something has in reducing strength, intensity, or effectiveness.
Example: "The new policy has a weakening effect on employee morale, leading to decreased productivity."
Alternatives: "a diminishing impact on" or "a reducing influence on".
The Devil's Quadrangle earned its name from the fact that improving one dimension has a weakening effect on at least one other (Reijers and Liman Mansar 2005).
In addition, increasing the number of layers produces a weakening effect on the overall mechanical performance in terms of critical strain.
Generally, it was found that acetic acid had a weakening effect on the flexural strength of samples sintered at 1700 °C but a beneficial effect on KIC of ceramics sintered at 1600 °C.
Another factor has a weakening effect on tax revenue in many towns: Even in places with some of the highest percentages of internal migrants, a scarcity of new births and internal immigrants has actually meant a net population loss overall.
The diffusion layer has a weakening effect on the suction among the soil particles, which means the increase of initial water content will weaken the matrix suction among the soil particles and reduce the infiltration of water.
At the temperature not higher than 165 °C, PPF has not melt and it presents a weakening effect on flexural strength because of its lower modulus of elasticity (HRPC1 > HRPC2).
As the coupling between the trigeminal nuclei and other pain related brain structures during sumatriptan treatment compared to saline is attenuated, we suggest a weakening effect of sumatriptan on functional brain connectivity during pain.
The spectre of nuclear war has a curiously weakening effect on superpowers.
The Turkish PM's latest foray into monetary policy had a predictably weakening effect on the lira, knocking it to 2.1460 against the US dollar, from 2.1350 beforehand.
The observed differences in DNA polymerase inhibition most likely reflects differences in the weakening effect on DNA-protein interactions [ 157], which in turn suggest a specific change in the DNA-binding domains of the individual polymerase enzymes.
In addition, it is quantitatively shown that any decrease in packing density of fullerenes lessens the weakening effect on the total stability of the nanopeapod.
