Растяжение кольцевых образцов

Лабораторная работа


Растяжение кольцевых образцов Цель работы: Определить модуль Юнгав окружном направлении и предел прочности. Провести статистическую обработку предела прочности по результатам испытаний всех групп. Приборы и оборудование: Испытательная ма...



61 KB

10 чел.

Растяжение кольцевых образцов

Цель работы:

Определить модуль Юнга в окружном направлении и предел прочности.

Провести статистическую обработку предела прочности по результатам испытаний всех групп.

Приборы и оборудование:

  1.  Испытательная машина
  2.  Штангенциркуль
  3.  Образец из стеклопластика кольцевой формы:

l = 19,6мм; h = 9,5мм; r(вн) = 71,25мм; r(нар)=76мм


Рис. 1 Зависимость перемещения от нагрузки.

Рис. 1 Зависимость деформаций от напряжений.

Модуль упругости:

Предел прочности: 


Статистическая обработка результатов испытаний:

E1, МПа

E2, МПа

E3, МПа




Среднее значение предела прочности   Eср=28,5 МПа

Среднеквадратичное отклонение  Eкв= = 4,69

Дисперсия разброса свойств D== 1,25

Вариация  W==0.044

Доверительный интервал

Верхняя граница Dв= Eср+ D

Dн= Eср D

t – Коэффициент Стьюдента для 3 опытов и вероятностью 0.95

t= 4.30




В ходе выполнения лабораторной работы было проведено знакомство с проведением испытания на растяжение кольцевых образцов, по результатам испытаний построена диаграмма деформирования, определены кольцевой модуль Юнга и предел прочности. Проведена статистическая обработка результатов опытов.


А также другие работы, которые могут Вас заинтересовать

57635. Fast Food (Advantages and disadvantages) 52.5 KB
  On previous lessons we were speaking about favourite recipes, different kinds of food and about ways and methods of cooking. So, let’s revise. Look on the board, please and tell what you have or don’t have in the fridge? Use your home exercise.
57636. You are as many times a man as many foreign languages you know 45.5 KB
  The people of Babylonia were rich and powerful. They were happy. They love each other and enjoyed working together. But one thing was lacking. Man had only the Earth to enjoy. Because God had kept heaven for himself and his evangels.
57637. Моє улюблене зимове свято 66.5 KB
  In Ukraine this tradition is celebrated on 19 December. Young children put their shoes or boots in front of the chimneys and sing songs. On the next morning they will find a small present in their shoe/boots, ranging from a bag of chocolate coins to a bag of marbles or some other small toy.
  Use the correct form of the Infinitive: Speak louder if you want... (to hear, to be heard) Don’t talk too much if you want people...(to listen, to be listened) to you. Ask yourself always: how can this... (do, be done). I am glad... (to take, to be taken) your advice.
57639. Travelling. The Visit to Kyiv 55.5 KB
  What is it? Railway station. Imagine that we will go to a trip to Kyiv. This is the map of the centre of Kyiv. So, the topic of our lesson is “The Visit to Kyiv”. Children, who helps us to know more about interesting places?
57640. Kyiv is the capital of Ukraine. Main cities 11.79 MB
  Good morning! I`m glad to see you Come here, make a circle and say a compliment. Choose a card and choose your team. They are: Tulips, Roses, Daffodils. We shall compete in some tasks and I will give you the scores. I wish you good luck.
57641. Languages of the world 128.5 KB
  You see that the first language in the list is Mandarin (Chinese) and the second is English. 6-й слайд Teacher: What do we know about languages? The oldest written language is Egyptian Mandarin Chinese is spoken by 700 million people. India has 845 languages.
57643. Health and Healthy Living 60 KB
  It’s great when we are well. But sometimes we have problems with our health. What do we feel? Call some symptoms: a headache, a backache, a toothache, a stomach ache, a burn, a bee sting, a cough, a running nose...