Material Analysis
4 조회수
Creep deformation of high impact polystyrene products
문제 현상
Products slowly deform under long-term continuous load, affecting long-term use performance and dimensional stability.
원인 분석
(1) High impact polystyrene is an amorphous material; slow creep still occurs below the glass transition temperature
(2) Products bear continuous load; the longer the time, the greater the deformation
(3) High use environment temperature accelerates creep
(4) Insufficient product wall thickness, large stress per unit area
(5) Low material molecular weight, poor creep resistance
해결 방법
(1) Increase product wall thickness or ribs, reduce stress per unit area
(2) Select high molecular weight grades, improve creep resistance
(3) Reduce use temperature, stay away from the glass transition temperature
(4) Consider creep amount in design, reserve deformation allowance
(5) Add glass fiber reinforcement when necessary
핵심 요약
Creep is the slow deformation of amorphous materials under continuous load.
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